Basalt

<h2 id="definition-and-characteristics">Definition and characteristics</h2>

Basalt is composed mostly of oxides of silicon, iron, magnesium, potassium, aluminum, titanium, and calcium. <a href="/facts/Geologists/vGc0tBHB">Geologists</a> classify <a href="/facts/Igneous_rock/xeMJhUah">igneous rock</a> by its mineral content whenever possible; the relative volume percentages of <a href="/facts/Quartz/4n86tE2G">quartz</a> (crystalline <a href="/facts/Silica/A3WILp6J">silica</a> (SiO2)), <a href="/facts/Alkali_feldspar/DVvFnfA9">alkali feldspar</a>, <a href="/facts/Plagioclase/X0XLHGKU">plagioclase</a>, and <a href="/facts/Feldspathoid/a2hPbGCg">feldspathoid</a> (<a href="/facts/QAPF_diagram/HgX5ys5K">QAPF</a>) are particularly important. An <a href="/facts/Aphanitic/nqFPUEjV">aphanitic</a> (fine-grained) igneous rock is classified as basalt when its QAPF fraction is composed of less than 10% feldspathoid and less than 20% quartz, and plagioclase makes up at least 65% of its feldspar content. This places basalt in the basalt/andesite field of the QAPF diagram. Basalt is further distinguished from andesite by its silica content of under 52%.<a class="footnote-ref" id="fnref:4" href="#fn:4">4</a><a class="footnote-ref" id="fnref:5" href="#fn:5">5</a><a class="footnote-ref" id="fnref:6" href="#fn:6">6</a><a class="footnote-ref" id="fnref:7" href="#fn:7">7</a>
It is often not practical to determine the mineral composition of volcanic rocks, due to their very small grain size, in which case geologists instead classify the rocks chemically, with particular emphasis on the total content of alkali metal oxides and silica (<a href="/facts/TAS_classification/rpnG8WBE">TAS</a>); in that context, basalt is defined as volcanic rock with a content of between 45% and 52% silica and no more than 5% alkali metal oxides. This places basalt in the B field of the TAS diagram.<a class="footnote-ref" id="fnref:8" href="#fn:8">8</a><a class="footnote-ref" id="fnref:9" href="#fn:9">9</a><a class="footnote-ref" id="fnref:10" href="#fn:10">10</a> Such a composition is described as <a href="/facts/Mafic/mVL7Ahuw">mafic</a>.<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a>
Basalt is usually dark grey to black in colour, due to a high content of <a href="/facts/Augite/7nq9ugk9">augite</a> or other dark-coloured <a href="/facts/Pyroxene/hWMTLF9o">pyroxene</a> minerals,[9]<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a><a class="footnote-ref" id="fnref:13" href="#fn:13">13</a> but can exhibit a wide range of shading. Some basalts are quite light-coloured due to a high content of plagioclase; these are sometimes described as leucobasalts.<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a><a class="footnote-ref" id="fnref:15" href="#fn:15">15</a> It can be difficult to distinguish between lighter-colored basalt and <a href="/facts/Andesite/AMVbAGJ0">andesite</a>, so <a href="/facts/Field_research/w66x8LQq">field researchers</a> commonly use a rule of thumb for this purpose, classifying it as basalt if it has a <a href="/facts/Color_index_(geology)/4n6vrtQy">color index</a> of 35 or greater.<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a>
The physical properties of basalt result from its relatively low silica content and typically high iron and magnesium content.<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a> The average density of basalt is 2.9 g/cm3, compared, for example, to <a href="/facts/Granite/G2evuVKo">granite</a>’s typical density of 2.7 g/cm3.<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a> The viscosity of basaltic magma is relatively low—around 104 to 105 <a href="/facts/Centipoise/NxFhk46h">cP</a>—similar to the viscosity of <a href="/facts/Ketchup/rDMar5Nt">ketchup</a>, but that is still several orders of magnitude higher than the viscosity of water, which is about 1 cP).<a class="footnote-ref" id="fnref:19" href="#fn:19">19</a>
Basalt is often <a href="/facts/Porphyritic/G81JCEky">porphyritic</a>, containing larger crystals (<a href="/facts/Phenocryst/jPVodoja">phenocrysts</a>) that formed before the extrusion event that brought the magma to the surface, embedded in a finer-grained <a href="/facts/Matrix_(geology)/dDgk5G1H">matrix</a>. These phenocrysts are usually made of augite, <a href="/facts/Olivine/tLLL4rae">olivine</a>, or a calcium-rich plagioclase,<a class="footnote-ref" id="fnref:20" href="#fn:20">20</a> which have <a href="/facts/Bowen%2527s_reaction_series/4BUaJo4h">the highest melting temperatures</a> of any of the <a href="/facts/Mineral/LkUFbNmv">minerals</a> that can typically crystallize from the melt, and which are therefore the first to form solid crystals.<a class="footnote-ref" id="fnref:21" href="#fn:21">21</a><a class="footnote-ref" id="fnref:22" href="#fn:22">22</a>
Basalt often contains <a href="/facts/Vesicular_texture/AGfqwta9">vesicles</a>; they are formed when dissolved gases bubble out of the magma as it decompresses during its approach to the surface; the erupted lava then solidifies before the gases can escape. When vesicles make up a substantial fraction of the volume of the rock, the rock is described as <a href="/facts/Scoria/E0PvzYg0">scoria</a>.<a class="footnote-ref" id="fnref:23" href="#fn:23">23</a><a class="footnote-ref" id="fnref:24" href="#fn:24">24</a>
The term basalt is at times applied to shallow <a href="/facts/Intrusive_rock/Wl6xaY1a">intrusive rocks</a> with a composition typical of basalt, but rocks of this composition with a <a href="/facts/Phaneritic/j5pQSmhr">phaneritic</a> (coarser) groundmass are more properly referred to either as <a href="/facts/Diabase/7XK2Sf8g">diabase</a> (also called dolerite) or—when they are more coarse-grained (having crystals over 2 mm across)—as <a href="/facts/Gabbro/79gTqpyg">gabbro</a>. Diabase and gabbro are thus the <a href="/facts/Hypabyssal/05JQkekt">hypabyssal</a> and <a href="/facts/Plutonic/Wl6xaY1a">plutonic</a> equivalents of basalt.<a class="footnote-ref" id="fnref:25" href="#fn:25">25</a><a class="footnote-ref" id="fnref:26" href="#fn:26">26</a>

During the <a href="/facts/Hadean/j7LWS4ah">Hadean</a>, <a href="/facts/Archean/PHt8Sm8n">Archean</a>, and early <a href="/facts/Proterozoic/sSGXxqUU">Proterozoic</a> <a href="/facts/Eon_(geology)/vBAm0D8Q">eons</a> of Earth's history, the chemistry of erupted magmas was significantly different from what it is today, due to immature crustal and <a href="/facts/Asthenosphere/lXpE97oP">asthenosphere</a> differentiation. The resulting <a href="/facts/Ultramafic_rock/7qAapP1d">ultramafic</a> volcanic rocks, with silica (SiO2) contents below 45% and high magnesium oxide (MgO) content, are usually classified as <a href="/facts/Komatiite/haEtqNaG">komatiites</a>.<a class="footnote-ref" id="fnref:27" href="#fn:27">27</a><a class="footnote-ref" id="fnref:28" href="#fn:28">28</a>

<h3>Etymology</h3>
The word "basalt" is ultimately derived from <a href="/facts/Late_Latin/Ju8RH1es">Late Latin</a> basaltes, a misspelling of Latin basanites "very <a href="/facts/Hardness/PtGn6E20">hard</a> stone", which was imported from <a href="/facts/Ancient_Greek/LIK7NlUh">Ancient Greek</a> βασανίτης (basanites), from βάσανος (basanos, "<a href="/facts/Touchstone_(assaying_tool)/f0tPARCM">touchstone</a>").<a class="footnote-ref" id="fnref:29" href="#fn:29">29</a> The modern petrological term basalt, describing a particular composition of <a href="/facts/Lava/q2an5SVN">lava</a>-derived rock, became standard because of its use by <a href="/facts/Georgius_Agricola/FXprFXAK">Georgius Agricola</a> in 1546, in his work <a href="/facts/De_Natura_Fossilium/dMFveQGf">De Natura Fossilium</a>. Agricola applied the term "basalt" to the volcanic black rock beneath the <a href="/facts/Bishop_of_Dresden-Meissen/kKINVYcH">Bishop of Meissen's</a> <a href="/facts/Stolpen/tYBk6JKR">Stolpen castle</a>, believing it to be the same as the "basaniten" described by <a href="/facts/Pliny_the_Elder/grx67ghR">Pliny the Elder</a> in AD 77 in <a href="/facts/Natural_History_(Pliny)/bMp2te1A">Naturalis Historiae</a>.<a class="footnote-ref" id="fnref:30" href="#fn:30">30</a>

<h3>Types</h3>

On Earth, most basalt is formed by <a href="/facts/Decompression_melting/xeMJhUah">decompression melting</a> of the <a href="/facts/Mantle_(geology)/RpDdtjCr">mantle</a>.<a class="footnote-ref" id="fnref:31" href="#fn:31">31</a> The high pressure in the upper mantle (due to <a href="/facts/Overburden_pressure/zowuttvc">the weight of the overlying rock</a>) raises the melting point of mantle rock, so that almost all of the upper mantle is solid. However, mantle rock is <a href="/facts/Ductile/SBJsahEk">ductile</a> (the solid rock slowly deforms under high stress). When <a href="/facts/Tectonics/jPcFacFP">tectonic forces</a> cause hot mantle rock to creep upwards, pressure on the ascending rock decreases, and this can lower its melting point enough for the rock to <a href="/facts/Partial_melting/2Q1RlczS">partially melt</a>, producing basaltic magma.<a class="footnote-ref" id="fnref:32" href="#fn:32">32</a>
Decompression melting can occur in a variety of tectonic settings, including in continental <a href="/facts/Rift/FAWNKCGF">rift</a> zones, at <a href="/facts/Mid-ocean_ridge/wYdgdSW3">mid-ocean ridges</a>, above <a href="/facts/Hotspot_(geology)/drIyXSLs">geological hotspots</a>,<a class="footnote-ref" id="fnref:33" href="#fn:33">33</a><a class="footnote-ref" id="fnref:34" href="#fn:34">34</a> and in <a href="/facts/Back-arc_basins/px4uAEVE">back-arc basins</a>.<a class="footnote-ref" id="fnref:35" href="#fn:35">35</a> Basalt also forms in <a href="/facts/Subduction_zones/rkasNdTo">subduction zones</a>, where mantle rock rises into a <a href="/facts/Mantle_wedge/KsKDLynK">mantle wedge</a> above the descending slab. The slab releases water vapor and other volatiles as it descends, which further lowers the melting point, further increasing the amount of decompression melting.<a class="footnote-ref" id="fnref:36" href="#fn:36">36</a> Each tectonic setting produces basalt with its own distinctive characteristics.<a class="footnote-ref" id="fnref:37" href="#fn:37">37</a> 

<ul><li><a href="/facts/Tholeiitic_basalt/e93b58Nj">Tholeiitic basalt</a>, which is relatively rich in <a href="/facts/Iron/QK1JYy8E">iron</a> and poor in <a href="/facts/Alkali_metal/IkWbCLk2">alkali metals</a> and <a href="/facts/Aluminium/7wmR8jYE">aluminium</a>,<a class="footnote-ref" id="fnref:38" href="#fn:38">38</a> include most basalts of the <a href="/facts/Ocean/8W8lYgjD">ocean</a> floor, most large <a href="/facts/Oceanic_island/46Apq1bJ">oceanic islands</a>,<a class="footnote-ref" id="fnref:39" href="#fn:39">39</a> and continental <a href="/facts/Flood_basalt/omlPkoyM">flood basalts</a> such as the <a href="/facts/Columbia_River_Basalt_Group/Kgx8Wz9f">Columbia River Plateau</a>.<a class="footnote-ref" id="fnref:40" href="#fn:40">40</a>
<ul><li>High- and low-titanium basalt rocks, which are sometimes classified based on their <a href="/facts/Titanium/53ArnDoy">titanium</a> (Ti) content in High-Ti and Low-Ti varieties. High-Ti and Low-Ti basalt have been distinguished from each other in the <a href="/facts/Paran%25C3%25A1_and_Etendeka_traps/RGo4baun">Paraná and Etendeka traps</a><a class="footnote-ref" id="fnref:41" href="#fn:41">41</a> and the <a href="/facts/Emeishan_Traps/2l6XyoK0">Emeishan Traps</a>.<a class="footnote-ref" id="fnref:42" href="#fn:42">42</a></li>
<li><a href="/facts/Mid-ocean_ridge/wYdgdSW3">Mid-ocean ridge</a> basalt (MORB) is a tholeiitic basalt that has almost exclusively erupted at ocean ridges; it is characteristically low in <a href="/facts/Incompatible_element/RqEMlFUu">incompatible elements</a>.<a class="footnote-ref" id="fnref:43" href="#fn:43">43</a>[9] Although all MORBs are chemically similar, geologists recognize that they vary significantly in how depleted they are in incompatible elements. When they are present in close proximity along mid-ocean ridges, that is seen as evidence for mantle inhomogeneity.<a class="footnote-ref" id="fnref:44" href="#fn:44">44</a>
<ul><li>Enriched MORB (E-MORB) is defined as MORB that is relatively undepleted in incompatible elements. It was once thought to be mostly located in hot spots along mid-ocean ridges, such as Iceland, but it is now known to be located in many other places along those ridges.<a class="footnote-ref" id="fnref:45" href="#fn:45">45</a></li>
<li>Normal MORB (N-MORB) is defined as MORB that has an average amount of incompatible elements.</li>
<li>D-MORB, depleted MORB, is defined as MORB that is highly depleted in incompatible elements.</li></ul></li></ul></li>
<li><a href="/facts/Alkali_basalt/LY6EpsQS">Alkali basalt</a> is relatively rich in alkali metals. It is <a href="/facts/Normative_mineralogy/QpRBM29B">silica-undersaturated</a> and may contain <a href="/facts/Feldspathoid/a2hPbGCg">feldspathoids</a>,<a class="footnote-ref" id="fnref:46" href="#fn:46">46</a> <a href="/facts/Alkali_feldspar/DVvFnfA9">alkali feldspar</a>, <a href="/facts/Phlogopite/rTJ3HeFy">phlogopite</a>, and <a href="/facts/Kaersutite/oc6h6wRj">kaersutite</a>. Augite in alkali basalts is titanium-enriched augite; low-calcium pyroxenes are never present.<a class="footnote-ref" id="fnref:47" href="#fn:47">47</a> They are characteristic of continental rifting and hotspot volcanism.<a class="footnote-ref" id="fnref:48" href="#fn:48">48</a></li>
<li>High-alumina basalt has greater than 17% <a href="/facts/Alumina/wXM9P6pI">alumina</a> (Al2O3) and is intermediate in composition between tholeiitic basalt and alkali basalt. Its relatively alumina-rich composition is based on rocks without phenocrysts of <a href="/facts/Plagioclase/X0XLHGKU">plagioclase</a>. These represent the low-silica end of the <a href="/facts/Calc-alkaline_magma_series/fW9qn0oc">calc-alkaline magma series</a> and are characteristic of <a href="/facts/Volcanic_arc/W2WawWYd">volcanic arcs</a> above subduction zones.<a class="footnote-ref" id="fnref:49" href="#fn:49">49</a></li>
<li><a href="/facts/Boninite/p61vogzy">Boninite</a> is a high-<a href="/facts/Magnesium/XyIhd2FG">magnesium</a> form of basalt that is erupted generally in <a href="/facts/Back-arc_basin/px4uAEVE">back-arc basins</a>; it is distinguished by its low titanium content and trace-element composition.[45]</li>
<li><a href="/facts/Ocean_island_basalt/Druz8GUn">Ocean island basalts</a> include both tholeiites and alkali basalts; the tholeiites predominate early in the eruptive history of the island. These basalts are characterized by elevated concentrations of incompatible elements, which suggests that their source mantle rock has produced little magma in the past (it is undepleted).<a class="footnote-ref" id="fnref:50" href="#fn:50">50</a></li></ul>
<h2 id="petrology">Petrology</h2>

The mineralogy of basalt is characterized by a preponderance of calcic plagioclase <a href="/facts/Feldspar/DVvFnfA9">feldspar</a> and <a href="/facts/Pyroxene/hWMTLF9o">pyroxene</a>. <a href="/facts/Olivine/tLLL4rae">Olivine</a> can also be a significant constituent.<a class="footnote-ref" id="fnref:51" href="#fn:51">51</a> Accessory <a href="/facts/Mineral/LkUFbNmv">minerals</a> present in relatively minor amounts include <a href="/facts/Iron_oxide/KDo8hLWn">iron oxides</a> and iron-titanium oxides, such as <a href="/facts/Magnetite/SVxoGUs2">magnetite</a>, <a href="/facts/Ulv%25C3%25B6spinel/lWTBEd94">ulvöspinel</a>, and <a href="/facts/Ilmenite/fh2eXgpo">ilmenite</a>.<a class="footnote-ref" id="fnref:52" href="#fn:52">52</a> Because of the presence of such <a href="/facts/Oxide/DXtoVe1C">oxide</a> minerals, basalt can acquire strong <a href="/facts/Magnetism/eo75vApl">magnetic</a> signatures as it cools, and <a href="/facts/Paleomagnetism/kDwUXDX5">paleomagnetic</a> studies have made extensive use of basalt.<a class="footnote-ref" id="fnref:53" href="#fn:53">53</a>
In <a href="/facts/Tholeiitic_basalt/e93b58Nj">tholeiitic basalt</a>, pyroxene (<a href="/facts/Augite/7nq9ugk9">augite</a> and <a href="/facts/Orthopyroxene/hWMTLF9o">orthopyroxene</a> or <a href="/facts/Pigeonite/LR6IKpvY">pigeonite</a>) and <a href="/facts/Calcium/hf252CC0">calcium</a>-rich plagioclase are common phenocryst minerals. Olivine may also be a phenocryst, and when present, may have rims of pigeonite. The <a href="/facts/Groundmass/dDgk5G1H">groundmass</a> contains interstitial quartz or <a href="/facts/Tridymite/GKBVUXRe">tridymite</a> or <a href="/facts/Cristobalite/r1rQss4r">cristobalite</a>. Olivine tholeiitic basalt has augite and orthopyroxene or pigeonite with abundant olivine, but olivine may have rims of pyroxene and is unlikely to be present in the <a href="/facts/Matrix_(geology)/dDgk5G1H">groundmass</a>.<a class="footnote-ref" id="fnref:54" href="#fn:54">54</a>
<a href="/facts/Alkali_basalt/LY6EpsQS">Alkali basalts</a> typically have mineral assemblages that lack orthopyroxene but contain olivine. Feldspar phenocrysts typically are <a href="/facts/Labradorite/PyDfR62q">labradorite</a> to <a href="/facts/Andesine/ac8YoY4w">andesine</a> in composition. Augite is rich in titanium compared to augite in tholeiitic basalt. Minerals such as <a href="/facts/Feldspar/DVvFnfA9">alkali feldspar</a>, <a href="/facts/Leucite/l1uVJHtm">leucite</a>, <a href="/facts/Nepheline/2PXytbnE">nepheline</a>, <a href="/facts/Sodalite/asvGHg81">sodalite</a>, <a href="/facts/Phlogopite/rTJ3HeFy">phlogopite</a> mica, and <a href="/facts/Apatite/f5tYvl1n">apatite</a> may be present in the groundmass.<a class="footnote-ref" id="fnref:55" href="#fn:55">55</a>
Basalt has high <a href="/facts/Liquidus/RtXE2d8B">liquidus</a> and <a href="/facts/Solidus_(chemistry)/BLbHPYH8">solidus</a> temperatures—values at the Earth's surface are near or above 1200 °C (liquidus)<a class="footnote-ref" id="fnref:56" href="#fn:56">56</a> and near or below 1000 °C (solidus); these values are higher than those of other common igneous rocks.<a class="footnote-ref" id="fnref:57" href="#fn:57">57</a>
The majority of tholeiitic basalts are formed at approximately 50–100 km depth within the mantle. Many alkali basalts may be formed at greater depths, perhaps as deep as 150–200 km.<a class="footnote-ref" id="fnref:58" href="#fn:58">58</a><a class="footnote-ref" id="fnref:59" href="#fn:59">59</a> The origin of high-alumina basalt continues to be controversial, with disagreement over whether it is a <a href="/facts/Magma/hRotHju9">primary melt</a> or derived from other basalt types by fractionation.<a class="footnote-ref" id="fnref:60" href="#fn:60">60</a>: 65 

<h3>Geochemistry</h3>
Relative to most common igneous rocks, basalt compositions are rich in <a href="/facts/Magnesium_oxide/0GfLn47t">MgO</a> and <a href="/facts/Calcium_oxide/Wh9C8l7j">CaO</a> and low in <a href="/facts/Silicon_dioxide/A3WILp6J">SiO2</a> and the alkali oxides, i.e., <a href="/facts/Sodium_oxide/QbdIGb8u">Na2O</a> + <a href="/facts/Potassium_oxide/mmUVvPef">K2O</a>, consistent with their <a href="/facts/TAS_classification/rpnG8WBE">TAS classification</a>. Basalt contains more silica than <a href="/facts/Picrobasalt/gS0w3bEH">picrobasalt</a> and most <a href="/facts/Basanite/29aUR5Ao">basanites</a> and <a href="/facts/Tephrite/NnLLluTR">tephrites</a> but less than <a href="/facts/Basaltic_andesite/E9oMfpgn">basaltic andesite</a>. Basalt has a lower total content of alkali oxides than <a href="/facts/Trachybasalt/e72S2L3L">trachybasalt</a> and most basanites and tephrites.<a class="footnote-ref" id="fnref:61" href="#fn:61">61</a>
Basalt generally has a composition of 45–52 <a href="/facts/Wt%2525/YMIH9egn">wt%</a> SiO2, 2–5 wt% total alkalis,<a class="footnote-ref" id="fnref:62" href="#fn:62">62</a> 0.5–2.0 wt% <a href="/facts/Titanium_dioxide/T0KWmKcz">TiO2</a>, 5–14 wt% <a href="/facts/Iron(II)_oxide/H9V7S3MG">FeO</a> and 14 wt% or more <a href="/facts/Alumina/wXM9P6pI">Al2O3</a>. Contents of CaO are commonly near 10 wt%, those of MgO commonly in the range 5 to 12 wt%.<a class="footnote-ref" id="fnref:63" href="#fn:63">63</a>
High-alumina basalts have aluminium contents of 17–19 wt% Al2O3; <a href="/facts/Boninite/p61vogzy">boninites</a> have <a href="/facts/Magnesium/XyIhd2FG">magnesium</a> (MgO) contents of up to 15 percent. Rare <a href="/facts/Feldspathoid/a2hPbGCg">feldspathoid</a>-rich <a href="/facts/Mafic/mVL7Ahuw">mafic</a> rocks, akin to alkali basalts, may have Na2O + K2O contents of 12% or more.<a class="footnote-ref" id="fnref:64" href="#fn:64">64</a>
The abundances of the <a href="/facts/Lanthanide/rt3XIRCl">lanthanide</a> or <a href="/facts/Rare-earth_element/PQSUQumk">rare-earth elements</a> (REE) can be a useful diagnostic tool to help explain the history of mineral crystallisation as the melt cooled. In particular, the relative abundance of europium compared to the other REE is often markedly higher or lower, and called the <a href="/facts/Europium_anomaly/vyAl2EaB">europium anomaly</a>. It arises because Eu2+ can substitute for Ca2+ in plagioclase feldspar, unlike any of the other lanthanides, which tend to only form 3+ <a href="/facts/Cation/wrbwhF3z">cations</a>.<a class="footnote-ref" id="fnref:65" href="#fn:65">65</a>
Mid-ocean ridge basalts (MORB) and their intrusive equivalents, gabbros, are the characteristic igneous rocks formed at mid-ocean ridges. They are tholeiitic basalts particularly low in total alkalis and in <a href="/facts/Compatibility_(geochemistry)/hdtG8qt8">incompatible</a> trace elements, and they have relatively flat REE patterns normalized to mantle or <a href="/facts/Chondrite/mbzbGm5A">chondrite</a> values. In contrast, alkali basalts have normalized patterns highly enriched in the light REE, and with greater abundances of the REE and of other incompatible elements. Because MORB basalt is considered a key to understanding <a href="/facts/Plate_tectonics/RtRG5lY4">plate tectonics</a>, its compositions have been much studied. Although MORB compositions are distinctive relative to average compositions of basalts erupted in other environments, they are not uniform. For instance, compositions change with position along the <a href="/facts/Mid-Atlantic_Ridge/q1Fgk4P1">Mid-Atlantic Ridge</a>, and the compositions also define different ranges in different ocean basins.<a class="footnote-ref" id="fnref:66" href="#fn:66">66</a> Mid-ocean ridge basalts have been subdivided into varieties such as normal (NMORB) and those slightly more enriched in incompatible elements (EMORB).<a class="footnote-ref" id="fnref:67" href="#fn:67">67</a>
<a href="/facts/Isotope/KD9B1y6o">Isotope</a> ratios of <a href="/facts/Chemical_element/0jducgWD">elements</a> such as <a href="/facts/Strontium/ABaA5qQK">strontium</a>, <a href="/facts/Neodymium/GzDkTIoI">neodymium</a>, <a href="/facts/Lead/EYljasJN">lead</a>, <a href="/facts/Hafnium/rBNnlxDS">hafnium</a>, and <a href="/facts/Osmium/1TjXD69n">osmium</a> in basalts have been much studied to learn about the evolution of the <a href="/facts/Earth%2527s_mantle/l9DjRLcc">Earth's mantle</a>.<a class="footnote-ref" id="fnref:68" href="#fn:68">68</a> Isotopic ratios of <a href="/facts/Noble_gas/j0yHMEAE">noble gases</a>, such as 3<a href="/facts/Helium/yRul93TG">He</a>/4He, are also of great value: for instance, ratios for basalts range from 6 to 10 for mid-ocean ridge tholeiitic basalt (normalized to atmospheric values), but to 15–24 and more for ocean-island basalts thought to be derived from <a href="/facts/Mantle_plume/wLXJ0Q4a">mantle plumes</a>.<a class="footnote-ref" id="fnref:69" href="#fn:69">69</a>
Source rocks for the partial melts that produce basaltic magma probably include both <a href="/facts/Peridotite/4NRPpWxw">peridotite</a> and <a href="/facts/Pyroxenite/orwgCqVw">pyroxenite</a>.<a class="footnote-ref" id="fnref:70" href="#fn:70">70</a>

<h3>Morphology and textures</h3>

The shape, structure and <a href="/facts/Rock_microstructure/rsR0CG11">texture</a> of a basalt is diagnostic of how and where it erupted—for example, whether into the sea, in an explosive <a href="/facts/Scoria/E0PvzYg0">cinder</a> eruption or as creeping <a href="/facts/P%25C4%2581hoehoe/q2an5SVN">pāhoehoe</a> lava flows, the classic image of <a href="/facts/Hawaii/ImxFefeK">Hawaiian</a> basalt eruptions.[62]

<h4>Subaerial eruptions</h4>
Main article: <a href="/facts/Subaerial_eruption/P4wGgH8T">Subaerial eruption</a>
Basalt that erupts under open air (that is, <a href="/facts/Subaerial/ub07gcRT">subaerially</a>) forms three distinct types of lava or volcanic deposits: <a href="/facts/Scoria/E0PvzYg0">scoria</a>; <a href="/facts/Volcanic_ash/c3cqgBfV">ash</a> or cinder (<a href="/facts/Breccia/fEmNFy8W">breccia</a>);<a class="footnote-ref" id="fnref:71" href="#fn:71">71</a> and lava flows.<a class="footnote-ref" id="fnref:72" href="#fn:72">72</a>
Basalt in the tops of subaerial lava flows and <a href="/facts/Cinder_cone/fE4dGJX7">cinder cones</a> will often be highly <a href="/facts/Vesicular_texture/AGfqwta9">vesiculated</a>, imparting a lightweight "frothy" texture to the rock.<a class="footnote-ref" id="fnref:73" href="#fn:73">73</a> Basaltic cinders are often red, coloured by oxidized <a href="/facts/Iron/QK1JYy8E">iron</a> from weathered iron-rich minerals such as <a href="/facts/Pyroxene/hWMTLF9o">pyroxene</a>.<a class="footnote-ref" id="fnref:74" href="#fn:74">74</a>
<a href="/facts/Lava/q2an5SVN">ʻAʻā</a> types of blocky cinder and breccia flows of thick, viscous basaltic <a href="/facts/Lava/q2an5SVN">lava</a> are common in Hawaiʻi. Pāhoehoe is a highly fluid, hot form of basalt which tends to form thin aprons of molten lava which fill up hollows and sometimes forms <a href="/facts/Lava_lake/m0yp1PtX">lava lakes</a>. <a href="/facts/Lava_tube/UmD2vNro">Lava tubes</a> are common features of pāhoehoe eruptions.<a class="footnote-ref" id="fnref:75" href="#fn:75">75</a>
Basaltic <a href="/facts/Tuff/PhhRoLdJ">tuff</a> or <a href="/facts/Pyroclastic_rock/5Hsu86hQ">pyroclastic</a> rocks are less common than basaltic lava flows. Usually basalt is too hot and fluid to build up sufficient pressure to form explosive lava eruptions but occasionally this will happen by trapping of the lava within the volcanic throat and buildup of <a href="/facts/Volcanic_gas/uu7qYRHS">volcanic gases</a>. Hawaiʻi's <a href="/facts/Mauna_Loa/89RmT52K">Mauna Loa</a> volcano erupted in this way in the 19th century, as did <a href="/facts/Mount_Tarawera/FuJwQMJ3">Mount Tarawera</a>, New Zealand in its violent 1886 eruption. <a href="/facts/Maar/RUgfHD5s">Maar</a> volcanoes are typical of small basalt tuffs, formed by explosive eruption of basalt through the crust, forming an apron of mixed basalt and wall rock breccia and a fan of basalt tuff further out from the volcano.<a class="footnote-ref" id="fnref:76" href="#fn:76">76</a>
Amygdaloidal structure is common in relict <a href="/facts/Vesicle_(geology)/AGfqwta9">vesicles</a> and beautifully <a href="/facts/Crystal/e2R2mk3E">crystallized</a> species of <a href="/facts/Zeolite/SNrXy4v2">zeolites</a>, <a href="/facts/Quartz/4n86tE2G">quartz</a> or <a href="/facts/Calcite/gKMHYQJo">calcite</a> are frequently found.<a class="footnote-ref" id="fnref:77" href="#fn:77">77</a>

<h5>Columnar basalt</h5>
Main article: <a href="/facts/Columnar_jointing/LFqtR5N5">Columnar jointing</a>
See also: <a href="/facts/List_of_places_with_columnar_basalt/YeN5HNWJ">List of places with columnar basalt</a>

During the cooling of a thick lava flow, contractional <a href="/facts/Joint_(geology)/Y78Q9UbK">joints</a> or fractures form.<a class="footnote-ref" id="fnref:78" href="#fn:78">78</a> If a flow cools relatively rapidly, significant <a href="/facts/Thermal_expansion/BP2vjX0N">contraction</a> forces build up. While a flow can shrink in the vertical dimension without fracturing, it cannot easily accommodate shrinking in the horizontal direction unless cracks form; the extensive fracture network that develops results in the formation of <a href="/facts/Columnar_jointing/LFqtR5N5">columns</a>. These structures, or <a href="/facts/Basalt_prism/ongMK9Jv">basalt prisms</a>, are predominantly hexagonal in cross-section, but polygons with three to twelve or more sides can be observed.<a class="footnote-ref" id="fnref:79" href="#fn:79">79</a> The size of the columns depends loosely on the rate of cooling; very rapid cooling may result in very small (<1 cm diameter) columns, while slow cooling is more likely to produce large columns.<a class="footnote-ref" id="fnref:80" href="#fn:80">80</a>

<h4>Submarine eruptions</h4>
Main article: <a href="/facts/Submarine_eruption/kb3Dj7Nx">Submarine eruption</a>

The character of submarine basalt eruptions is largely determined by depth of water, since increased pressure restricts the release of volatile gases and results in effusive eruptions.<a class="footnote-ref" id="fnref:81" href="#fn:81">81</a> It has been estimated that at depths greater than 500 metres (1,600 ft), explosive activity associated with basaltic magma is suppressed.[73] Above this depth, submarine eruptions are often explosive, tending to produce <a href="/facts/Pyroclastic_rock/5Hsu86hQ">pyroclastic rock</a> rather than basalt flows.<a class="footnote-ref" id="fnref:82" href="#fn:82">82</a> These eruptions, described as Surtseyan, are characterised by large quantities of steam and gas and the creation of large amounts of <a href="/facts/Pumice/lWTnk1Tg">pumice</a>.<a class="footnote-ref" id="fnref:83" href="#fn:83">83</a> 

<h5>Pillow basalts</h5>
Main article: <a href="/facts/Pillow_lava/woqCVd2p">Pillow lava</a>
When basalt erupts underwater or flows into the sea, contact with the water quenches the surface and the lava forms a distinctive pillow shape, through which the hot lava breaks to form another pillow. This "pillow" texture is very common in underwater basaltic flows and is diagnostic of an underwater eruption environment when found in ancient rocks. Pillows typically consist of a fine-grained core with a glassy crust and have radial jointing. The size of individual pillows varies from 10 cm up to several metres.<a class="footnote-ref" id="fnref:84" href="#fn:84">84</a>
When <a href="/facts/Pahoehoe/q2an5SVN">pāhoehoe</a> lava enters the sea it usually forms pillow basalts. However, when ʻaʻā enters the ocean it forms a <a href="/facts/Littoral_cone/w2g3Gt0A">littoral cone</a>, a small cone-shaped accumulation of tuffaceous debris formed when the blocky ʻaʻā lava enters the water and explodes from built-up steam.[77]
The island of <a href="/facts/Surtsey/EcAcFgI9">Surtsey</a> in the <a href="/facts/Atlantic_Ocean/EI4uChIb">Atlantic Ocean</a> is a basalt volcano which breached the ocean surface in 1963. The initial phase of Surtsey's eruption was highly explosive, as the magma was quite fluid, causing the rock to be blown apart by the boiling steam to form a tuff and cinder cone. This has subsequently moved to a typical pāhoehoe-type behaviour.<a class="footnote-ref" id="fnref:85" href="#fn:85">85</a><a class="footnote-ref" id="fnref:86" href="#fn:86">86</a>
<a href="/facts/Volcanic_glass/MFmUlyad">Volcanic glass</a> may be present, particularly as rinds on rapidly chilled surfaces of lava flows, and is commonly (but not exclusively) associated with underwater eruptions.<a class="footnote-ref" id="fnref:87" href="#fn:87">87</a>
Pillow basalt is also produced by some <a href="/facts/Subglacial_eruption/IMf1x6b9">subglacial</a> volcanic eruptions.<a class="footnote-ref" id="fnref:88" href="#fn:88">88</a>

<h2 id="distribution">Distribution</h2>
<h3>Earth</h3>
Basalt is the most common volcanic rock type on Earth, making up over 90% of all volcanic rock on the planet.<a class="footnote-ref" id="fnref:89" href="#fn:89">89</a> The <a href="/facts/Crust_(geology)/FYG1kP4F">crustal</a> portions of <a href="/facts/Ocean/8W8lYgjD">oceanic</a> <a href="/facts/Tectonic_plate/CvbfSfeC">tectonic plates</a> are composed predominantly of basalt, produced from upwelling mantle below the <a href="/facts/Ocean_ridge/wYdgdSW3">ocean ridges</a>.<a class="footnote-ref" id="fnref:90" href="#fn:90">90</a> Basalt is also the principal volcanic rock in many <a href="/facts/Oceanic_island/46Apq1bJ">oceanic islands</a>, including the islands of <a href="/facts/Hawaii_(island)/6CeBU0t6">Hawaiʻi</a>,<a class="footnote-ref" id="fnref:91" href="#fn:91">91</a> the <a href="/facts/Faroe_Islands/HMJ3bfmN">Faroe Islands</a>,<a class="footnote-ref" id="fnref:92" href="#fn:92">92</a> and <a href="/facts/R%25C3%25A9union/8088YvSY">Réunion</a>.<a class="footnote-ref" id="fnref:93" href="#fn:93">93</a> The eruption of basalt lava is observed by geologists at about 20 volcanoes per year.<a class="footnote-ref" id="fnref:94" href="#fn:94">94</a>

Basalt is the rock most typical of <a href="/facts/Large_igneous_province/qFBmvU4z">large igneous provinces</a>. These include <a href="/facts/Continental_flood_basalt/qFBmvU4z">continental flood basalts</a>, the most voluminous basalts found on land.<a class="footnote-ref" id="fnref:95" href="#fn:95">95</a> Examples of continental flood basalts included the <a href="/facts/Deccan_Traps/HdvPLMuQ">Deccan Traps</a> in <a href="/facts/India/1kKHcnxM">India</a>,<a class="footnote-ref" id="fnref:96" href="#fn:96">96</a> the <a href="/facts/Chilcotin_Group/t3QCnV5G">Chilcotin Group</a> in <a href="/facts/British_Columbia/Ty3e3g1Q">British Columbia</a>,<a class="footnote-ref" id="fnref:97" href="#fn:97">97</a> <a href="/facts/Canada/cWWFM8oc">Canada</a>, the <a href="/facts/Paran%25C3%25A1_Traps/RGo4baun">Paraná Traps</a> in Brazil,<a class="footnote-ref" id="fnref:98" href="#fn:98">98</a> the <a href="/facts/Siberian_Traps/KBT2LmFh">Siberian Traps</a> in <a href="/facts/Russia/jfkCwyxn">Russia</a>,<a class="footnote-ref" id="fnref:99" href="#fn:99">99</a> the <a href="/facts/Karoo/ANscNmls">Karoo</a> <a href="/facts/Flood_basalt/omlPkoyM">flood basalt</a> province in South Africa,<a class="footnote-ref" id="fnref:100" href="#fn:100">100</a> and the <a href="/facts/Columbia_River_Plateau/GENPnXvM">Columbia River Plateau</a> of <a href="/facts/Washington_(state)/7tCrTFnN">Washington</a> and <a href="/facts/Oregon/4Uq446Ko">Oregon</a>.<a class="footnote-ref" id="fnref:101" href="#fn:101">101</a> Basalt is also prevalent across extensive regions of the Eastern <a href="/facts/Galilee_earthquake_of_1837/1bKQXLkk">Galilee</a>, <a href="/facts/Golan_Heights/KtqR6nDN">Golan</a>, and <a href="/facts/Bashan/TRpFRQT9">Bashan</a> in <a href="/facts/Israel/dEe3IcaY">Israel</a> and <a href="/facts/Syria/7pDXGzq8">Syria</a>.<a class="footnote-ref" id="fnref:102" href="#fn:102">102</a>
Basalt also is common around volcanic arcs, specially those on thin <a href="/facts/Crust_(geology)/FYG1kP4F">crust</a>.<a class="footnote-ref" id="fnref:103" href="#fn:103">103</a>
Ancient <a href="/facts/Precambrian/zjF3N3Rx">Precambrian</a> basalts are usually only found in fold and thrust belts, and are often heavily metamorphosed. These are known as <a href="/facts/Greenstone_belt/BVHGpXJG">greenstone belts</a>,<a class="footnote-ref" id="fnref:104" href="#fn:104">104</a><a class="footnote-ref" id="fnref:105" href="#fn:105">105</a> because low-grade <a href="/facts/Metamorphism/8eWHgy6K">metamorphism</a> of basalt produces <a href="/facts/Chlorite_group/1jzSNrwH">chlorite</a>, <a href="/facts/Actinolite/Xql9k08e">actinolite</a>, <a href="/facts/Epidote/v5dMC97J">epidote</a> and other green minerals.<a class="footnote-ref" id="fnref:106" href="#fn:106">106</a>

<h3>Other bodies in the Solar System</h3>
As well as forming large parts of the Earth's crust, basalt also occurs in other parts of the Solar System. Basalt commonly erupts on <a href="/facts/Io_(moon)/p3Uc8FmK">Io</a> (the third largest moon of <a href="/facts/Jupiter/95m7XjMT">Jupiter</a>),<a class="footnote-ref" id="fnref:107" href="#fn:107">107</a> and has also formed on the <a href="/facts/Moon/zKHqEMPb">Moon</a>, <a href="/facts/Mars/AQGtVvz0">Mars</a>, <a href="/facts/Venus/pADnueP6">Venus</a>, and the asteroid <a href="/facts/4_Vesta/xnQ8acw1">Vesta</a>.

<h4>The Moon</h4>

The dark areas visible on Earth's <a href="/facts/Moon/zKHqEMPb">moon</a>, the <a href="/facts/Lunar_mare/g606GphC">lunar maria</a>, are plains of <a href="/facts/Flood_basalt/omlPkoyM">flood basaltic</a> lava flows. These rocks were sampled both by the crewed American <a href="/facts/Apollo_program/IC1Ek1Ao">Apollo program</a> and the robotic Russian <a href="/facts/Luna_program/9zjH1plI">Luna program</a>, and are represented among the <a href="/facts/Lunar_meteorite/gpq02Hsf">lunar meteorites</a>.<a class="footnote-ref" id="fnref:108" href="#fn:108">108</a>
Lunar basalts differ from their Earth counterparts principally in their high iron contents, which typically range from about 17 to 22 wt% FeO. They also possess a wide range of titanium concentrations (present in the mineral <a href="/facts/Ilmenite/fh2eXgpo">ilmenite</a>),<a class="footnote-ref" id="fnref:109" href="#fn:109">109</a><a class="footnote-ref" id="fnref:110" href="#fn:110">110</a> ranging from less than 1 wt% TiO2, to about 13 wt.%. Traditionally, lunar basalts have been classified according to their titanium content, with classes being named high-Ti, low-Ti, and very-low-Ti. Nevertheless, global geochemical maps of titanium obtained from the <a href="/facts/Clementine_mission/XXUnPkpG">Clementine mission</a> demonstrate that the lunar maria possess a continuum of titanium concentrations, and that the highest concentrations are the least abundant.<a class="footnote-ref" id="fnref:111" href="#fn:111">111</a>
Lunar basalts show exotic textures and mineralogy, particularly <a href="/facts/Shock_metamorphism/5X0Ub069">shock metamorphism</a>, lack of the <a href="/facts/Redox/Pyd5RVcj">oxidation</a> typical of terrestrial basalts, and a complete lack of <a href="/facts/Mineral_hydration/YJ1NEwVP">hydration</a>.<a class="footnote-ref" id="fnref:112" href="#fn:112">112</a> Most of the <a href="/facts/Geology_of_the_Moon/vhIu0V7k">Moon</a>'s basalts erupted between about 3 and 3.5 billion years ago, but the oldest samples are 4.2 billion years old, and the youngest flows, based on the age dating method of <a href="/facts/Crater_counting/raDlCEtg">crater counting</a>, are estimated to have erupted only 1.2 billion years ago.<a class="footnote-ref" id="fnref:113" href="#fn:113">113</a>

<h4>Venus</h4>
From 1972 to 1985, five <a href="/facts/Venera/quSQDDDM">Venera</a> and two <a href="/facts/Vega_program/dlUY7oYv">VEGA</a> landers successfully reached the surface of Venus and carried out geochemical measurements using X-ray fluorescence and gamma-ray analysis. These returned results consistent with the rock at the landing sites being basalts, including both tholeiitic and highly alkaline basalts. The landers are thought to have landed on plains whose radar signature is that of basaltic lava flows. These constitute about 80% of the surface of Venus. Some locations show high reflectivity consistent with unweathered basalt, indicating basaltic volcanism within the last 2.5 million years.<a class="footnote-ref" id="fnref:114" href="#fn:114">114</a>

<h4>Mars</h4>
Basalt is also a common rock on the surface of <a href="/facts/Mars/AQGtVvz0">Mars</a>, as determined by data sent back from the planet's surface,<a class="footnote-ref" id="fnref:115" href="#fn:115">115</a> and by <a href="/facts/Martian_meteorite/kp9vW6RM">Martian meteorites</a>.<a class="footnote-ref" id="fnref:116" href="#fn:116">116</a><a class="footnote-ref" id="fnref:117" href="#fn:117">117</a>

<h4>Vesta</h4>
Analysis of <a href="/facts/Hubble_Space_Telescope/NQeIf0vw">Hubble Space Telescope</a> images of Vesta suggests this <a href="/facts/Asteroid/g7Ulr1VB">asteroid</a> has a basaltic crust covered with a brecciated <a href="/facts/Regolith/EdXuHK56">regolith</a> derived from the crust.<a class="footnote-ref" id="fnref:118" href="#fn:118">118</a> Evidence from Earth-based telescopes and the <a href="/facts/Dawn_(spacecraft)/z4JeyNQB">Dawn mission</a> suggest that Vesta is the source of the <a href="/facts/HED_meteorite/5W2K84zC">HED meteorites</a>, which have basaltic characteristics.<a class="footnote-ref" id="fnref:119" href="#fn:119">119</a> Vesta is the main contributor to the inventory of basaltic asteroids of the main Asteroid Belt.<a class="footnote-ref" id="fnref:120" href="#fn:120">120</a>

<h4>Io</h4>
Lava flows represent a major volcanic terrain on <a href="/facts/Io_(moon)/p3Uc8FmK">Io</a>.<a class="footnote-ref" id="fnref:121" href="#fn:121">121</a> Analysis of the Voyager images led scientists to believe that these flows were composed mostly of various compounds of molten sulfur. However, subsequent Earth-based <a href="/facts/Infrared/44XdJNcc">infrared</a> studies and measurements from the Galileo spacecraft indicate that these flows are composed of basaltic lava with mafic to ultramafic compositions.<a class="footnote-ref" id="fnref:122" href="#fn:122">122</a> This conclusion is based on temperature measurements of Io's "hotspots", or thermal-emission locations, which suggest temperatures of at least 1,300 K and some as high as 1,600 K.<a class="footnote-ref" id="fnref:123" href="#fn:123">123</a> Initial estimates suggesting eruption temperatures approaching 2,000 K<a class="footnote-ref" id="fnref:124" href="#fn:124">124</a> have since proven to be overestimates because the wrong thermal models were used to model the temperatures.<a class="footnote-ref" id="fnref:125" href="#fn:125">125</a><a class="footnote-ref" id="fnref:126" href="#fn:126">126</a>

<h2 id="alteration-of-basalt">Alteration of basalt</h2>
<h3>Weathering</h3>
See also: <a href="/facts/Weathering/uSYGlv0H">Weathering</a>

Compared to granitic rocks exposed at the Earth's surface, basalt <a href="/facts/Outcrop/3MC1NG4y">outcrops</a> weather relatively rapidly. This reflects their content of minerals that crystallized at higher temperatures and in an environment poorer in water vapor than granite. These minerals are less stable in the colder, wetter environment at the Earth's surface. The finer grain size of basalt and the <a href="/facts/Volcanic_glass/MFmUlyad">volcanic glass</a> sometimes found between the grains also hasten weathering. The high iron content of basalt causes weathered surfaces in humid climates to accumulate a thick crust of <a href="/facts/Hematite/716YBzGr">hematite</a> or other iron oxides and hydroxides, staining the rock a brown to rust-red colour.<a class="footnote-ref" id="fnref:127" href="#fn:127">127</a><a class="footnote-ref" id="fnref:128" href="#fn:128">128</a><a class="footnote-ref" id="fnref:129" href="#fn:129">129</a><a class="footnote-ref" id="fnref:130" href="#fn:130">130</a> Because of the low potassium content of most basalts, weathering converts the basalt to calcium-rich <a href="/facts/Clay/xnwouEkB">clay</a> (<a href="/facts/Montmorillonite/PxKtefgA">montmorillonite</a>) rather than potassium-rich clay (<a href="/facts/Illite/m4u7Ee4X">illite</a>). Further weathering, particularly in tropical climates, converts the montmorillonite to <a href="/facts/Kaolinite/N7D6K65q">kaolinite</a> or <a href="/facts/Gibbsite/MdBYjXPW">gibbsite</a>. This produces the distinctive tropical <a href="/facts/Soil/5Ddpr3QM">soil</a> known as <a href="/facts/Laterite/3FYFwspo">laterite</a>.<a class="footnote-ref" id="fnref:131" href="#fn:131">131</a> The ultimate weathering product is <a href="/facts/Bauxite/CJ10QPc6">bauxite</a>, the principal ore of aluminium.<a class="footnote-ref" id="fnref:132" href="#fn:132">132</a>
Chemical weathering also releases readily water-soluble cations such as <a href="/facts/Calcium/hf252CC0">calcium</a>, <a href="/facts/Sodium/eYuSPu2V">sodium</a> and <a href="/facts/Magnesium/XyIhd2FG">magnesium</a>, which give basaltic areas a strong <a href="/facts/Buffer_capacity/zrLz9eaa">buffer capacity</a> against <a href="/facts/Soil_acidification/az27kN26">acidification</a>.<a class="footnote-ref" id="fnref:133" href="#fn:133">133</a> Calcium released by basalts binds <a href="/facts/Carbon_dioxide/xGzpppEp">CO2</a> from the atmosphere forming <a href="/facts/Calcium_carbonate/UQ1wLFna">CaCO3</a> acting thus as a CO2 trap.<a class="footnote-ref" id="fnref:134" href="#fn:134">134</a>

<h3>Metamorphism</h3>

Intense heat or great pressure transforms basalt into its <a href="/facts/Metamorphic_rock/JRp6dsCm">metamorphic rock</a> equivalents. Depending on the temperature and pressure of metamorphism, these may include <a href="/facts/Greenschist/YPfK0NVk">greenschist</a>, <a href="/facts/Amphibolite/eIbMHC0J">amphibolite</a>, or <a href="/facts/Eclogite/H2Yy5PhD">eclogite</a>. Basalts are important rocks within metamorphic regions because they can provide vital information on the conditions of <a href="/facts/Metamorphism/8eWHgy6K">metamorphism</a> that have affected the region.<a class="footnote-ref" id="fnref:135" href="#fn:135">135</a>
Metamorphosed basalts are important hosts for a variety of <a href="/facts/Hydrothermal/hqwwksSm">hydrothermal</a> <a href="/facts/Ore/kgc9DssX">ores</a>, including deposits of gold, copper and <a href="/facts/Volcanogenic_massive_sulfide_ore_deposit/XT014hIu">volcanogenic massive sulfides</a>.<a class="footnote-ref" id="fnref:136" href="#fn:136">136</a>

<h2 id="life-on-basaltic-rocks">Life on basaltic rocks</h2>
The common corrosion features of underwater volcanic basalt suggest that microbial activity may play a significant role in the chemical exchange between basaltic rocks and seawater. The significant amounts of reduced iron, Fe(II), and manganese, Mn(II), present in basaltic rocks provide potential energy sources for <a href="/facts/Bacteria/wC8xSCsU">bacteria</a>. Some Fe(II)-oxidizing bacteria cultured from iron-sulfide surfaces are also able to grow with basaltic rock as a source of Fe(II).<a class="footnote-ref" id="fnref:137" href="#fn:137">137</a> Fe- and Mn- oxidizing bacteria have been cultured from weathered submarine basalts of <a href="/facts/Kama%25CA%25BBehuakanaloa_Seamount/4QRcmJHM">Kamaʻehuakanaloa Seamount</a> (formerly Loihi).<a class="footnote-ref" id="fnref:138" href="#fn:138">138</a> The impact of bacteria on altering the chemical composition of basaltic glass (and thus, the <a href="/facts/Oceanic_crust/0lGjI7jN">oceanic crust</a>) and seawater suggest that these interactions may lead to an application of <a href="/facts/Hydrothermal_vents/0xPqNUkY">hydrothermal vents</a> to the <a href="/facts/Origin_of_life/BvAmLPQP">origin of life</a>.<a class="footnote-ref" id="fnref:139" href="#fn:139">139</a>

<h2 id="uses">Uses</h2>

Basalt is used in construction (e.g. as building blocks or in the <a href="/facts/Foundation_(engineering)/ACVkQsDy">groundwork</a>),<a class="footnote-ref" id="fnref:140" href="#fn:140">140</a> making <a href="/facts/Cobblestone/G6KFpSsV">cobblestones</a> (from columnar basalt)<a class="footnote-ref" id="fnref:141" href="#fn:141">141</a> and in making <a href="/facts/Statue/kgahNmpN">statues</a>.<a class="footnote-ref" id="fnref:142" href="#fn:142">142</a><a class="footnote-ref" id="fnref:143" href="#fn:143">143</a> Heating and <a href="/facts/Extrusion/wM2kJ6wc">extruding</a> basalt yields <a href="/facts/Stone_wool/NzLte52T">stone wool</a>, which has potential to be an excellent <a href="/facts/Thermal_insulation/j7tVT4uv">thermal insulator</a>.<a class="footnote-ref" id="fnref:144" href="#fn:144">144</a><a class="footnote-ref" id="fnref:145" href="#fn:145">145</a><a class="footnote-ref" id="fnref:146" href="#fn:146">146</a><a class="footnote-ref" id="fnref:147" href="#fn:147">147</a>
<a href="/facts/Carbon_sequestration/WDBvr9eU">Carbon sequestration</a> in basalt has been studied as a means of removing carbon dioxide, produced by human industrialization, from the atmosphere. Underwater basalt deposits, scattered in seas around the globe, have the added benefit of the water serving as a barrier to the re-release of CO2 into the atmosphere.<a class="footnote-ref" id="fnref:148" href="#fn:148">148</a><a class="footnote-ref" id="fnref:149" href="#fn:149">149</a>

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Basalt_fan_structure/olhaTc6K">Basalt fan structure</a> – Rock formation</li>
<li><a href="/facts/Basalt_fiber/tfFcB3X2">Basalt fiber</a> – Structural fibres spun from melted basalt</li>
<li><a href="/facts/Bimodal_volcanism/bwmtXfxk">Bimodal volcanism</a> – Eruption of both mafic and felsic lavas from a single volcanic centre</li>
<li><a href="/facts/Plutonism/XtAmajwq">Plutonism</a> – Geological theory that Earth's igneous rocks formed by solidification of molten material</li>
<li><a href="/facts/Polybaric_melting/wmUbUY2N">Polybaric melting</a> – A mode of origin of basaltic magma</li>
<li><a href="/facts/Shield_volcano/e9LE47vh">Shield volcano</a> – Low-profile volcano usually formed almost entirely of fluid lava flows</li>
<li><a href="/facts/Spilite/3IJUVHat">Spilite</a> – Fine-grained igneous rock, resulting from alteration of oceanic basalt</li>
<li><a href="/facts/Sideromelane/8treodjp">Sideromelane</a> – Vitreous basaltic volcanic glass</li>
<li><a href="/facts/Volcano/c2M5upml">Volcano</a> – Rupture in a planet's crust where material escapes</li>
<li> Geology portal</li></ul>

<h2 id="sources">Sources</h2>
<ul><li>Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-7167-2438-4.</li>
<li>Blatt, Harvey; Middleton, Gerard; Murray, Raymond (1980). Origin of sedimentary rocks (2d ed.). Englewood Cliffs, N.J.: Prentice-Hall. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-13-642710-0.</li>
<li>Crawford, A.J. (1989). Boninites. London: Unwin Hyman. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-04-445003-0.</li>
<li>Hyndman, Donald W. (1985). Petrology of igneous and metamorphic rocks (2nd ed.). McGraw-Hill. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-07-031658-4.</li>
<li>Klein, Cornelis; Hurlbut, Cornelius S. Jr. (1993). Manual of mineralogy : (after James D. Dana) (21st ed.). New York: Wiley. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-471-57452-1.</li>
<li>Levin, Harold L. (2010). The earth through time (9th ed.). Hoboken, N.J.: J. Wiley. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-470-38774-0.</li>
<li>Lillie, Robert J. (2005). Parks and plates : the geology of our national parks, monuments, and seashores (1st ed.). New York: W.W. Norton. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-393-92407-7.</li>
<li>Macdonald, Gordon A.; Abbott, Agatin T.; Peterson, Frank L. (1983). Volcanoes in the sea : the geology of Hawaii (2nd ed.). Honolulu: University of Hawaii Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-8248-0832-7.</li>
<li>McBirney, Alexander R. (1984). Igneous petrology. San Francisco, Calif.: Freeman, Cooper. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-19-857810-9.</li>
<li>Parfitt, Elisabeth Ann; Parfitt, Liz; Wilson, Lionel (2008). Fundamentals of Physical Volcanology. Wiley. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-632-05443-5.</li>
<li>Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-521-88006-0.</li>
<li>Schmincke, Hans-Ulrich (2003). Volcanism. Berlin: Springer. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-3-540-43650-8.</li></ul>
<h2 id="further-reading">Further reading</h2>

<ul><li>Francis, Peter; Oppenheimer, Clive (2003). Volcanoes (2nd ed.). Oxford: Oxford University Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-19-925469-9.</li>
<li>Gill, Robin (2010). <a href="https://archive.org/details/Igneous_Rocks_and_Processes_A_Practical_Guide_by_R_Gill">Igneous rocks and processes: a practical guide</a>. Chichester, West Sussex, UK: Wiley-Blackwell. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-1-4443-3065-6.</li>
<li>Hall, Anthony (1996). Igneous petrology. Harlow: Longman Scientific & Technical. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-582-23080-4.</li>
<li>Siegesmund, Siegfried; Snethlage, Rolf, eds. (2013). Stone in architecture properties, durability (3rd ed.). Springer Science & Business Media. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-3-662-10070-7.</li>
<li>Young, Davis A. (2003). Mind over magma : the story of igneous petrology. Princeton, N.J.: Princeton University Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-691-10279-5.</li></ul>

<h2 id="external-links">External links</h2>

Wikimedia Commons has media related to Basalt.

<a href="/facts/Wikisource/TrMdylNf">Wikisource</a> has the text of the <a href="/facts/Encyclop%25C3%25A6dia_Britannica_Eleventh_Edition/mPElbCRY">1911 Encyclopædia Britannica</a> article "Basalt".

<ul><li><a href="https://web.archive.org/web/20071107063242/http://giantcrystals.strahlen.org/europe/basalt.htm">Basalt Columns</a></li>
<li><a href="http://geographyinaction.co.uk//Geology%20files/Basalt.html">Basalt in Northern Ireland</a> <a href="https://web.archive.org/web/20210224191248/http://geographyinaction.co.uk//Geology%20files/Basalt.html">Archived</a> 24 February 2021 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a></li>
<li><a href="https://web.archive.org/web/20070913025149/http://www.geology.sdsu.edu/how_volcanoes_work/lava_water.html">Lava–water interface</a></li>
<li><a href="https://web.archive.org/web/20080820010048/http://www.petdb.org/">PetDB, the Petrological Database</a></li>
<li><a href="https://web.archive.org/web/20080607121825/http://www.union.edu/PUBLIC/GEODEPT/COURSES/petrology/moon_rocks/">Petrology of Lunar Rocks and Mare Basalts</a></li>
<li><a href="https://web.archive.org/web/20080916123604/http://volcanoes.usgs.gov/images/pglossary/PillowLava.php">Pillow lava USGS</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">"basalt". Cambridge Dictionary. Cambridge University Press. Retrieved 4 December 2024. <a href="https://dictionary.cambridge.org/dictionary/english/basalt" target="_blank">https://dictionary.cambridge.org/dictionary/english/basalt</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">"basalt". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 3 February 2020. <a href="https://web.archive.org/web/20200203123653/https://www.lexico.com/definition/basalt" target="_blank">https://web.archive.org/web/20200203123653/https://www.lexico.com/definition/basalt</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">"basalt". Merriam-Webster.com Dictionary. Merriam-Webster. <a href="https://www.merriam-webster.com/dictionary/basalt" target="_blank">https://www.merriam-webster.com/dictionary/basalt</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">Le Bas, M. J.; Streckeisen, A. L. (1991). "The IUGS systematics of igneous rocks". Journal of the Geological Society. 148 (5): 825–833. Bibcode:1991JGSoc.148..825L. CiteSeerX 10.1.1.692.4446. doi:10.1144/gsjgs.148.5.0825. S2CID 28548230. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">"Rock Classification Scheme - Vol 1 - Igneous" (PDF). British Geological Survey: Rock Classification Scheme. 1: 1–52. 1999. Archived (PDF) from the original on 29 March 2018. <a href="http://nora.nerc.ac.uk/id/eprint/3223/1/RR99006.pdf" target="_blank">http://nora.nerc.ac.uk/id/eprint/3223/1/RR99006.pdf</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">"CLASSIFICATION OF IGNEOUS ROCKS". Archived from the original on 30 September 2011. <a href="https://web.archive.org/web/20110930102012/http://geology.csupomona.edu/alert/igneous/igclass.htm" target="_blank">https://web.archive.org/web/20110930102012/http://geology.csupomona.edu/alert/igneous/igclass.htm</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">Philpotts & Ague 2009, pp. 139–143. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Le Bas, M. J.; Streckeisen, A. L. (1991). "The IUGS systematics of igneous rocks". Journal of the Geological Society. 148 (5): 825–833. Bibcode:1991JGSoc.148..825L. CiteSeerX 10.1.1.692.4446. doi:10.1144/gsjgs.148.5.0825. S2CID 28548230. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">"Rock Classification Scheme - Vol 1 - Igneous" (PDF). British Geological Survey: Rock Classification Scheme. 1: 1–52. 1999. Archived (PDF) from the original on 29 March 2018. <a href="http://nora.nerc.ac.uk/id/eprint/3223/1/RR99006.pdf" target="_blank">http://nora.nerc.ac.uk/id/eprint/3223/1/RR99006.pdf</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Philpotts & Ague 2009, pp. 139–143. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">"Oilfield Glossary". Schlumberger Ltd. 2021. <a href="http://www.glossary.oilfield.slb.com/en/Terms/m/mafic.aspx" target="_blank">http://www.glossary.oilfield.slb.com/en/Terms/m/mafic.aspx</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">Blatt & Tracy 1996, p. 57. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">Levin 2010, p. 63. - Levin, Harold L. (2010). The earth through time (9th ed.). Hoboken, N.J.: J. Wiley. ISBN 978-0-470-38774-0. <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">Wilson, F. H. (1985). "The Meshik Arc – an eocene to earliest miocene magmatic arc on the Alaska Peninsula". Alaska Division of Geological & Geophysical Surveys Professional Report. 88: PR 88. Bibcode:1985usgs.rept....1W. doi:10.14509/2269. <a href="https://doi.org/10.14509%2F2269" target="_blank">https://doi.org/10.14509%2F2269</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">Nozhkin, A.D.; Turkina, O.M.; Likhanov, I.I.; Dmitrieva, N.V. (February 2016). "Late Paleoproterozoic volcanic associations in the southwestern Siberian craton (Angara-Kan block)". Russian Geology and Geophysics. 57 (2): 247–264. Bibcode:2016RuGG...57..247N. doi:10.1016/j.rgg.2016.02.003. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">Philpotts & Ague 2009, p. 139. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
<li id="fn:17">"Basalt". USGS Volcano Hazards program – Glossary. USGS. 8 April 2015. Retrieved 27 July 2018. <a href="https://volcanoes.usgs.gov/vsc/glossary/basalt.html" target="_blank">https://volcanoes.usgs.gov/vsc/glossary/basalt.html</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></li>
<li id="fn:18">Philpotts & Ague 2009, p. 22. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:18" class="footnote-back-ref">↩</a></li>
<li id="fn:19">Philpotts & Ague 2009, pp. 23–25. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:19" class="footnote-back-ref">↩</a></li>
<li id="fn:20">Blatt & Tracy 1996, p. 57. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:20" class="footnote-back-ref">↩</a></li>
<li id="fn:21">Klein & Hurlbut 1993, pp. 558–560. - Klein, Cornelis; Hurlbut, Cornelius S. Jr. (1993). Manual of mineralogy : (after James D. Dana) (21st ed.). New York: Wiley. ISBN 978-0-471-57452-1. <a href="#fnref:21" class="footnote-back-ref">↩</a></li>
<li id="fn:22">Nave, R. "Bowen's Reaction Series". Hyperphysics. Georgia State University. Retrieved 24 March 2021. <a href="http://hyperphysics.phy-astr.gsu.edu/hbase/Geophys/Bowen.html" target="_blank">http://hyperphysics.phy-astr.gsu.edu/hbase/Geophys/Bowen.html</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></li>
<li id="fn:23">Blatt & Tracy 1996, pp. 27, 42–44. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:23" class="footnote-back-ref">↩</a></li>
<li id="fn:24">Jones, C.E. "Scoria and Pumice". Department of Geology & Planetary Science. University of Pittsburgh. Retrieved 24 March 2021. <a href="https://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousTextures/8PumiceScoria.html" target="_blank">https://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousTextures/8PumiceScoria.html</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></li>
<li id="fn:25">"Rock Classification Scheme - Vol 1 - Igneous" (PDF). British Geological Survey: Rock Classification Scheme. 1: 1–52. 1999. Archived (PDF) from the original on 29 March 2018. <a href="http://nora.nerc.ac.uk/id/eprint/3223/1/RR99006.pdf" target="_blank">http://nora.nerc.ac.uk/id/eprint/3223/1/RR99006.pdf</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></li>
<li id="fn:26">Levin 2010, pp. 58–60. - Levin, Harold L. (2010). The earth through time (9th ed.). Hoboken, N.J.: J. Wiley. ISBN 978-0-470-38774-0. <a href="#fnref:26" class="footnote-back-ref">↩</a></li>
<li id="fn:27">Philpotts & Ague 2009, pp. 399–400. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:27" class="footnote-back-ref">↩</a></li>
<li id="fn:28">"Komatiite". Atlas of Magmatic Rocks. Comenius University in Bratislava. Retrieved 24 March 2021. <a href="http://www.atlas-hornin.sk/en/record/54/komatiite" target="_blank">http://www.atlas-hornin.sk/en/record/54/komatiite</a> <a href="#fnref:28" class="footnote-back-ref">↩</a></li>
<li id="fn:29">Tietz, O.; Büchner, J. (29 December 2018). "The origin of the term 'basalt'". Journal of Geosciences: 295–298. doi:10.3190/jgeosci.273. <a href="https://doi.org/10.3190%2Fjgeosci.273" target="_blank">https://doi.org/10.3190%2Fjgeosci.273</a> <a href="#fnref:29" class="footnote-back-ref">↩</a></li>
<li id="fn:30">Tietz, Olaf; Büchner, Joerg (2018). "The origin of the term 'basalt'" (PDF). Journal of Geosciences. 63 (4): 295–298. doi:10.3190/jgeosci.273. Archived (PDF) from the original on 28 April 2019. Retrieved 19 August 2020. <a href="http://www.jgeosci.org/content/jgeosci.273_tietz.pdf" target="_blank">http://www.jgeosci.org/content/jgeosci.273_tietz.pdf</a> <a href="#fnref:30" class="footnote-back-ref">↩</a></li>
<li id="fn:31">Philpotts & Ague 2009, pp. 16–17. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:31" class="footnote-back-ref">↩</a></li>
<li id="fn:32">Green, D. H.; Ringwood, A. E. (2013). "The Origin of Basalt Magmas". The Earth's Crust and Upper Mantle. Geophysical Monograph Series. Vol. 13. pp. 489–495. Bibcode:1969GMS....13..489G. doi:10.1029/GM013p0489. ISBN 978-1-118-66897-9. <a href="978-1-118-66897-9" target="_blank">978-1-118-66897-9</a> <a href="#fnref:32" class="footnote-back-ref">↩</a></li>
<li id="fn:33">Blatt & Tracy 1996, pp. 151–156, 191–195, 162–163, 200. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:33" class="footnote-back-ref">↩</a></li>
<li id="fn:34">Philpotts & Ague 2009, pp. 236, 593–595. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:34" class="footnote-back-ref">↩</a></li>
<li id="fn:35">Stern, Robert J. (2002). "Subduction zones". Reviews of Geophysics. 40 (4): 1012. Bibcode:2002RvGeo..40.1012S. doi:10.1029/2001RG000108. S2CID 15347100. <a href="https://doi.org/10.1029%2F2001RG000108" target="_blank">https://doi.org/10.1029%2F2001RG000108</a> <a href="#fnref:35" class="footnote-back-ref">↩</a></li>
<li id="fn:36">Stern 2002, p. 22–24. - Stern, Robert J. (2002). "Subduction zones". Reviews of Geophysics. 40 (4): 1012. Bibcode:2002RvGeo..40.1012S. doi:10.1029/2001RG000108. S2CID 15347100. <a href="https://doi.org/10.1029%2F2001RG000108" target="_blank">https://doi.org/10.1029%2F2001RG000108</a> <a href="#fnref:36" class="footnote-back-ref">↩</a></li>
<li id="fn:37">Philpotts & Ague 2009, pp. 356–361. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:37" class="footnote-back-ref">↩</a></li>
<li id="fn:38">Philpotts & Ague 2009, pp. 143–146. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:38" class="footnote-back-ref">↩</a></li>
<li id="fn:39">Philpotts & Ague 2009, pp. 365–370. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:39" class="footnote-back-ref">↩</a></li>
<li id="fn:40">Philpotts & Ague 2009, pp. 52–59. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:40" class="footnote-back-ref">↩</a></li>
<li id="fn:41">Gibson, S. A.; Thompson, R. N.; Dickin, A. P.; Leonardos, O. H. (December 1995). "High-Ti and low-Ti mafic potassic magmas: Key to plume-lithosphere interactions and continental flood-basalt genesis". Earth and Planetary Science Letters. 136 (3–4): 149–165. Bibcode:1995E&PSL.136..149G. doi:10.1016/0012-821X(95)00179-G. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:41" class="footnote-back-ref">↩</a></li>
<li id="fn:42">Hou, Tong; Zhang, Zhaochong; Kusky, Timothy; Du, Yangsong; Liu, Junlai; Zhao, Zhidan (October 2011). "A reappraisal of the high-Ti and low-Ti classification of basalts and petrogenetic linkage between basalts and mafic–ultramafic intrusions in the Emeishan Large Igneous Province, SW China". Ore Geology Reviews. 41 (1): 133–143. Bibcode:2011OGRv...41..133H. doi:10.1016/j.oregeorev.2011.07.005. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:42" class="footnote-back-ref">↩</a></li>
<li id="fn:43">Blatt & Tracy 1996, pp. 156–158. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:43" class="footnote-back-ref">↩</a></li>
<li id="fn:44">Waters, Christopher L.; Sims, Kenneth W. W.; Perfit, Michael R.; Blichert-Toft, Janne; Blusztajn, Jurek (March 2011). "Perspective on the Genesis of E-MORB from Chemical and Isotopic Heterogeneity at 9–10°N East Pacific Rise". Journal of Petrology. 52 (3): 565–602. doi:10.1093/petrology/egq091. <a href="/wiki/Janne_Blichert-Toft" target="_blank">/wiki/Janne_Blichert-Toft</a> <a href="#fnref:44" class="footnote-back-ref">↩</a></li>
<li id="fn:45">Donnelly, Kathleen E.; Goldstein, Steven L.; Langmuir, Charles H.; Spiegelman, Marc (October 2004). "Origin of enriched ocean ridge basalts and implications for mantle dynamics". Earth and Planetary Science Letters. 226 (3–4): 347–366. Bibcode:2004E&PSL.226..347D. doi:10.1016/j.epsl.2004.07.019. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:45" class="footnote-back-ref">↩</a></li>
<li id="fn:46">Philpotts & Ague 2009, pp. 143–146. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:46" class="footnote-back-ref">↩</a></li>
<li id="fn:47">Blatt & Tracy 1996, p. 75. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:47" class="footnote-back-ref">↩</a></li>
<li id="fn:48">Philpotts & Ague 2009, pp. 368–370, 390–394. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:48" class="footnote-back-ref">↩</a></li>
<li id="fn:49">Philpotts & Ague 2009, pp. 375–376. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:49" class="footnote-back-ref">↩</a></li>
<li id="fn:50">Philpotts & Ague 2009, pp. 368–370. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:50" class="footnote-back-ref">↩</a></li>
<li id="fn:51">Levin 2010, p. 62. - Levin, Harold L. (2010). The earth through time (9th ed.). Hoboken, N.J.: J. Wiley. ISBN 978-0-470-38774-0. <a href="#fnref:51" class="footnote-back-ref">↩</a></li>
<li id="fn:52">Blatt & Tracy 1996, p. 75. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:52" class="footnote-back-ref">↩</a></li>
<li id="fn:53">Levin 2010, p. 185. - Levin, Harold L. (2010). The earth through time (9th ed.). Hoboken, N.J.: J. Wiley. ISBN 978-0-470-38774-0. <a href="#fnref:53" class="footnote-back-ref">↩</a></li>
<li id="fn:54">Blatt & Tracy 1996, p. 75. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:54" class="footnote-back-ref">↩</a></li>
<li id="fn:55">Blatt & Tracy 1996, p. 75. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:55" class="footnote-back-ref">↩</a></li>
<li id="fn:56">McBirney 1984, pp. 366–367. - McBirney, Alexander R. (1984). Igneous petrology. San Francisco, Calif.: Freeman, Cooper. ISBN 978-0-19-857810-9. <a href="#fnref:56" class="footnote-back-ref">↩</a></li>
<li id="fn:57">Philpotts & Ague 2009, p. 252. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:57" class="footnote-back-ref">↩</a></li>
<li id="fn:58">Condie, Kent C. (1997). "Tectonic settings". Plate Tectonics and Crustal Evolution. pp. 69–109. doi:10.1016/B978-075063386-4/50003-3. ISBN 978-0-7506-3386-4. <a href="978-0-7506-3386-4" target="_blank">978-0-7506-3386-4</a> <a href="#fnref:58" class="footnote-back-ref">↩</a></li>
<li id="fn:59">Kushiro, Ikuo (2007). "Origin of magmas in subduction zones: a review of experimental studies". Proceedings of the Japan Academy, Series B. 83 (1): 1–15. Bibcode:2007PJAB...83....1K. doi:10.2183/pjab.83.1. PMC 3756732. PMID 24019580. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3756732" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3756732</a> <a href="#fnref:59" class="footnote-back-ref">↩</a></li>
<li id="fn:60">Ozerov, Alexei Y (January 2000). "The evolution of high-alumina basalts of the Klyuchevskoy volcano, Kamchatka, Russia, based on microprobe analyses of mineral inclusions" (PDF). Journal of Volcanology and Geothermal Research. 95 (1–4): 65–79. Bibcode:2000JVGR...95...65O. doi:10.1016/S0377-0273(99)00118-3. Archived (PDF) from the original on 6 March 2020. <a href="http://repo.kscnet.ru/2569/1/my_2000_f_en_JVGR.pdf" target="_blank">http://repo.kscnet.ru/2569/1/my_2000_f_en_JVGR.pdf</a> <a href="#fnref:60" class="footnote-back-ref">↩</a></li>
<li id="fn:61">Philpotts & Ague 2009, pp. 139–143. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:61" class="footnote-back-ref">↩</a></li>
<li id="fn:62">Philpotts & Ague 2009, pp. 139–143. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:62" class="footnote-back-ref">↩</a></li>
<li id="fn:63">Irvine, T. N.; Baragar, W. R. A. (1 May 1971). "A Guide to the Chemical Classification of the Common Volcanic Rocks". Canadian Journal of Earth Sciences. 8 (5): 523–548. Bibcode:1971CaJES...8..523I. doi:10.1139/e71-055. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:63" class="footnote-back-ref">↩</a></li>
<li id="fn:64">Irvine & Baragar 1971. - Irvine, T. N.; Baragar, W. R. A. (1 May 1971). "A Guide to the Chemical Classification of the Common Volcanic Rocks". Canadian Journal of Earth Sciences. 8 (5): 523–548. Bibcode:1971CaJES...8..523I. doi:10.1139/e71-055. <a href="https://ui.adsabs.harvard.edu/abs/1971CaJES...8..523I" target="_blank">https://ui.adsabs.harvard.edu/abs/1971CaJES...8..523I</a> <a href="#fnref:64" class="footnote-back-ref">↩</a></li>
<li id="fn:65">Philpotts & Ague 2009, p. 359. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:65" class="footnote-back-ref">↩</a></li>
<li id="fn:66">Hofmann, A.W. (2014). "Sampling Mantle Heterogeneity through Oceanic Basalts: Isotopes and Trace Elements". Treatise on Geochemistry. pp. 67–101. doi:10.1016/B978-0-08-095975-7.00203-5. ISBN 978-0-08-098300-4. <a href="978-0-08-098300-4" target="_blank">978-0-08-098300-4</a> <a href="#fnref:66" class="footnote-back-ref">↩</a></li>
<li id="fn:67">Philpotts & Ague 2009, p. 312. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:67" class="footnote-back-ref">↩</a></li>
<li id="fn:68">Philpotts & Ague 2009, Chapter 13. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:68" class="footnote-back-ref">↩</a></li>
<li id="fn:69">Class, Cornelia; Goldstein, Steven L. (August 2005). "Evolution of helium isotopes in the Earth's mantle". Nature. 436 (7054): 1107–1112. Bibcode:2005Natur.436.1107C. doi:10.1038/nature03930. PMID 16121171. S2CID 4396462. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:69" class="footnote-back-ref">↩</a></li>
<li id="fn:70">Alexander V. Sobolev; Albrecht W. Hofmann; Dmitry V. Kuzmin; Gregory M. Yaxley; Nicholas T. Arndt; Sun-Lin Chung; Leonid V. Danyushevsky; Tim Elliott; Frederick A. Frey; Michael O. Garcia; Andrey A. Gurenko; Vadim S. Kamenetsky; Andrew C. Kerr; Nadezhda A. Krivolutskaya; Vladimir V. Matvienkov; Igor K. Nikogosian; Alexander Rocholl; Ingvar A. Sigurdsson; Nadezhda M. Sushchevskaya & Mengist Teklay (20 April 2007). "The Amount of Recycled Crust in Sources of Mantle-Derived Melts" (PDF). Science. 316 (5823): 412–417. Bibcode:2007Sci...316..412S. doi:10.1126/science.x. PMID 17395795. <a href="/wiki/Sun-Lin_Chung" target="_blank">/wiki/Sun-Lin_Chung</a> <a href="#fnref:70" class="footnote-back-ref">↩</a></li>
<li id="fn:71">Blatt & Tracy 1996, pp. 27–28. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:71" class="footnote-back-ref">↩</a></li>
<li id="fn:72">Blatt & Tracy 1996, pp. 22–23. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:72" class="footnote-back-ref">↩</a></li>
<li id="fn:73">Blatt & Tracy 1996, pp. 43–44. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:73" class="footnote-back-ref">↩</a></li>
<li id="fn:74">Lillie 2005, p. 41. - Lillie, Robert J. (2005). Parks and plates : the geology of our national parks, monuments, and seashores (1st ed.). New York: W.W. Norton. ISBN 978-0-393-92407-7. <a href="#fnref:74" class="footnote-back-ref">↩</a></li>
<li id="fn:75">Blatt & Tracy 1996, pp. 22–23. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:75" class="footnote-back-ref">↩</a></li>
<li id="fn:76">Schmincke 2003, Chapter 12. - Schmincke, Hans-Ulrich (2003). Volcanism. Berlin: Springer. ISBN 978-3-540-43650-8. <a href="#fnref:76" class="footnote-back-ref">↩</a></li>
<li id="fn:77">Philpotts & Ague 2009, p. 64. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:77" class="footnote-back-ref">↩</a></li>
<li id="fn:78">Smalley, I. J. (April 1966). "Contraction Crack Networks in Basalt Flows". Geological Magazine. 103 (2): 110–114. Bibcode:1966GeoM..103..110S. doi:10.1017/S0016756800050482. S2CID 131237003. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:78" class="footnote-back-ref">↩</a></li>
<li id="fn:79">Weaire, D.; Rivier, N. (January 1984). "Soap, cells and statistics—random patterns in two dimensions". Contemporary Physics. 25 (1): 59–99. Bibcode:1984ConPh..25...59W. doi:10.1080/00107518408210979. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:79" class="footnote-back-ref">↩</a></li>
<li id="fn:80">Spry, Alan (January 1962). "The origin of columnar jointing, particularly in basalt flows". Journal of the Geological Society of Australia. 8 (2): 191–216. Bibcode:1962AuJES...8..191S. doi:10.1080/14400956208527873. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:80" class="footnote-back-ref">↩</a></li>
<li id="fn:81">Francis, P. (1993) Volcanoes: A Planetary Perspective, Oxford University Press. <a href="#fnref:81" class="footnote-back-ref">↩</a></li>
<li id="fn:82">Head, James W.; Wilson, Lionel (2003). "Deep submarine pyroclastic eruptions: theory and predicted landforms and deposits". Journal of Volcanology and Geothermal Research. 121 (3–4): 155–193. Bibcode:2003JVGR..121..155H. doi:10.1016/S0377-0273(02)00425-0. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:82" class="footnote-back-ref">↩</a></li>
<li id="fn:83">[1], Smithsonian Institution National Museum of Natural History Global Volcanism Program (2013). <a href="http://www.volcano.si.edu/galleries.cfm?p=11" target="_blank">http://www.volcano.si.edu/galleries.cfm?p=11</a> <a href="#fnref:83" class="footnote-back-ref">↩</a></li>
<li id="fn:84">Schmincke 2003, p. 64. - Schmincke, Hans-Ulrich (2003). Volcanism. Berlin: Springer. ISBN 978-3-540-43650-8. <a href="#fnref:84" class="footnote-back-ref">↩</a></li>
<li id="fn:85">Kokelaar, B.Peter; Durant, Graham P. (December 1983). "The submarine eruption and erosion of Surtla (Surtsey), Iceland". Journal of Volcanology and Geothermal Research. 19 (3–4): 239–246. Bibcode:1983JVGR...19..239K. doi:10.1016/0377-0273(83)90112-9. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:85" class="footnote-back-ref">↩</a></li>
<li id="fn:86">Moore, James G. (November 1985). "Structure and eruptive mechanisms at Surtsey Volcano, Iceland". Geological Magazine. 122 (6): 649–661. Bibcode:1985GeoM..122..649M. doi:10.1017/S0016756800032052. S2CID 129242411. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:86" class="footnote-back-ref">↩</a></li>
<li id="fn:87">Blatt & Tracy 1996, pp. 24–25. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:87" class="footnote-back-ref">↩</a></li>
<li id="fn:88">Blatt & Tracy 1996, pp. 24–25. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:88" class="footnote-back-ref">↩</a></li>
<li id="fn:89">"Basalt". Geology: rocks and minerals. The University of Auckland. 2005. Retrieved 27 July 2018. <a href="https://flexiblelearning.auckland.ac.nz/rocks_minerals/rocks/basalt.html" target="_blank">https://flexiblelearning.auckland.ac.nz/rocks_minerals/rocks/basalt.html</a> <a href="#fnref:89" class="footnote-back-ref">↩</a></li>
<li id="fn:90">Philpotts & Ague 2009, pp. 366–368. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:90" class="footnote-back-ref">↩</a></li>
<li id="fn:91">Philpotts & Ague 2009, pp. 365–370. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:91" class="footnote-back-ref">↩</a></li>
<li id="fn:92">Schmincke 2003, p. 91. - Schmincke, Hans-Ulrich (2003). Volcanism. Berlin: Springer. ISBN 978-3-540-43650-8. <a href="#fnref:92" class="footnote-back-ref">↩</a></li>
<li id="fn:93">Upton, B. G. J.; Wadsworth, W. J. (July 1965). "Geology of Réunion Island, Indian Ocean". Nature. 207 (4993): 151–154. Bibcode:1965Natur.207..151U. doi:10.1038/207151a0. S2CID 4144134. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:93" class="footnote-back-ref">↩</a></li>
<li id="fn:94">Walker, G.P.L. (1993). "Basaltic-volcano systems". In Prichard, H.M.; Alabaster, T.; Harris, N.B.W.; Neary, C.R. (eds.). Magmatic Processes and Plate Tectonics. Geological Society Special Publication 76. The Geological Society. pp. 3–38. ISBN 978-0-903317-94-8. <a href="978-0-903317-94-8" target="_blank">978-0-903317-94-8</a> <a href="#fnref:94" class="footnote-back-ref">↩</a></li>
<li id="fn:95">Philpotts & Ague 2009, pp. 52–59. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:95" class="footnote-back-ref">↩</a></li>
<li id="fn:96">Mahoney, John J. (1988). "Deccan Traps". Continental Flood Basalts. Petrology and Structural Geology. Vol. 3. pp. 151–194. doi:10.1007/978-94-015-7805-9_5. ISBN 978-90-481-8458-3. <a href="978-90-481-8458-3" target="_blank">978-90-481-8458-3</a> <a href="#fnref:96" class="footnote-back-ref">↩</a></li>
<li id="fn:97">Bevier, Mary Lou (1 April 1983). "Regional stratigraphy and age of Chilcotin Group basalts, south-central British Columbia". Canadian Journal of Earth Sciences. 20 (4): 515–524. Bibcode:1983CaJES..20..515B. doi:10.1139/e83-049. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:97" class="footnote-back-ref">↩</a></li>
<li id="fn:98">Renne, P. R.; Ernesto, M.; Pacca, I. G.; Coe, R. S.; Glen, J. M.; Prevot, M.; Perrin, M. (6 November 1992). "The Age of Parana Flood Volcanism, Rifting of Gondwanaland, and the Jurassic-Cretaceous Boundary". Science. 258 (5084): 975–979. Bibcode:1992Sci...258..975R. doi:10.1126/science.258.5084.975. PMID 17794593. S2CID 43246541. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:98" class="footnote-back-ref">↩</a></li>
<li id="fn:99">Renne, P. R.; Basu, A. R. (12 July 1991). "Rapid Eruption of the Siberian Traps Flood Basalts at the Permo-Triassic Boundary". Science. 253 (5016): 176–179. Bibcode:1991Sci...253..176R. doi:10.1126/science.253.5016.176. PMID 17779134. S2CID 6374682. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:99" class="footnote-back-ref">↩</a></li>
<li id="fn:100">Jourdan, F.; Féraud, G.; Bertrand, H.; Watkeys, M. K. (February 2007). "From flood basalts to the inception of oceanization: Example from the 40 Ar/ 39 Ar high-resolution picture of the Karoo large igneous province". Geochemistry, Geophysics, Geosystems. 8 (2): n/a. Bibcode:2007GGG.....8.2002J. doi:10.1029/2006GC001392. <a href="https://doi.org/10.1029%2F2006GC001392" target="_blank">https://doi.org/10.1029%2F2006GC001392</a> <a href="#fnref:100" class="footnote-back-ref">↩</a></li>
<li id="fn:101">Hooper, P. R. (19 March 1982). "The Columbia River Basalts". Science. 215 (4539): 1463–1468. Bibcode:1982Sci...215.1463H. doi:10.1126/science.215.4539.1463. PMID 17788655. S2CID 6182619. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:101" class="footnote-back-ref">↩</a></li>
<li id="fn:102">Reich, Ronny; Katzenstein, Hannah (1992). "Glossary of Archaeological Terms". In Kempinski, Aharon; Reich, Ronny (eds.). The Architecture of Ancient Israel. Jerusalem: Israel Exploration Society. p. 312. ISBN 978-965-221-013-5. <a href="978-965-221-013-5" target="_blank">978-965-221-013-5</a> <a href="#fnref:102" class="footnote-back-ref">↩</a></li>
<li id="fn:103">Philpotts & Ague 2009, pp. 374–380. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:103" class="footnote-back-ref">↩</a></li>
<li id="fn:104">Philpotts & Ague 2009, pp. 398–399. - Philpotts, Anthony R.; Ague, Jay J. (2009). Principles of igneous and metamorphic petrology (2nd ed.). Cambridge, UK: Cambridge University Press. ISBN 978-0-521-88006-0. <a href="#fnref:104" class="footnote-back-ref">↩</a></li>
<li id="fn:105">Smithies, R. Hugh; Ivanic, Tim J.; Lowrey, Jack R.; Morris, Paul A.; Barnes, Stephen J.; Wyche, Stephen; Lu, Yong-Jun (April 2018). "Two distinct origins for Archean greenstone belts". Earth and Planetary Science Letters. 487: 106–116. Bibcode:2018E&PSL.487..106S. doi:10.1016/j.epsl.2018.01.034. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:105" class="footnote-back-ref">↩</a></li>
<li id="fn:106">Blatt & Tracy 1996, pp. 366–367. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:106" class="footnote-back-ref">↩</a></li>
<li id="fn:107">Lopes, Rosaly M. C.; Gregg, Tracy K. P. (2004). Volcanic Worlds: Exploring The Solar System's Volcanoes. Springer-Praxis. p. 135. ISBN 978-3-540-00431-8. <a href="978-3-540-00431-8" target="_blank">978-3-540-00431-8</a> <a href="#fnref:107" class="footnote-back-ref">↩</a></li>
<li id="fn:108">Lucey, P. (1 January 2006). "Understanding the Lunar Surface and Space-Moon Interactions". Reviews in Mineralogy and Geochemistry. 60 (1): 83–219. Bibcode:2006RvMG...60...83L. doi:10.2138/rmg.2006.60.2. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:108" class="footnote-back-ref">↩</a></li>
<li id="fn:109">Bhanoo, Sindya N. (28 December 2015). "New Type of Rock Is Discovered on Moon". The New York Times. Retrieved 29 December 2015. <a href="https://www.nytimes.com/2015/12/29/science/new-type-of-rock-is-discovered-on-moon.html" target="_blank">https://www.nytimes.com/2015/12/29/science/new-type-of-rock-is-discovered-on-moon.html</a> <a href="#fnref:109" class="footnote-back-ref">↩</a></li>
<li id="fn:110">Ling, Zongcheng; Jolliff, Bradley L.; Wang, Alian; Li, Chunlai; Liu, Jianzhong; Zhang, Jiang; Li, Bo; Sun, Lingzhi; Chen, Jian; Xiao, Long; Liu, Jianjun; Ren, Xin; Peng, Wenxi; Wang, Huanyu; Cui, Xingzhu; He, Zhiping; Wang, Jianyu (December 2015). "Correlated compositional and mineralogical investigations at the Chang'e-3 landing site". Nature Communications. 6 (1): 8880. Bibcode:2015NatCo...6.8880L. doi:10.1038/ncomms9880. PMC 4703877. PMID 26694712. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4703877" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4703877</a> <a href="#fnref:110" class="footnote-back-ref">↩</a></li>
<li id="fn:111">Giguere, Thomas A.; Taylor, G. Jeffrey; Hawke, B. Ray; Lucey, Paul G. (January 2000). "The titanium contents of lunar mare basalts". Meteoritics & Planetary Science. 35 (1): 193–200. Bibcode:2000M&PS...35..193G. doi:10.1111/j.1945-5100.2000.tb01985.x. <a href="https://doi.org/10.1111%2Fj.1945-5100.2000.tb01985.x" target="_blank">https://doi.org/10.1111%2Fj.1945-5100.2000.tb01985.x</a> <a href="#fnref:111" class="footnote-back-ref">↩</a></li>
<li id="fn:112">Lucey 2006. - Lucey, P. (1 January 2006). "Understanding the Lunar Surface and Space-Moon Interactions". Reviews in Mineralogy and Geochemistry. 60 (1): 83–219. Bibcode:2006RvMG...60...83L. doi:10.2138/rmg.2006.60.2. <a href="https://ui.adsabs.harvard.edu/abs/2006RvMG...60...83L" target="_blank">https://ui.adsabs.harvard.edu/abs/2006RvMG...60...83L</a> <a href="#fnref:112" class="footnote-back-ref">↩</a></li>
<li id="fn:113">Hiesinger, Harald; Jaumann, Ralf; Neukum, Gerhard; Head, James W. (25 December 2000). "Ages of mare basalts on the lunar nearside". Journal of Geophysical Research: Planets. 105 (E12): 29239–29275. Bibcode:2000JGR...10529239H. doi:10.1029/2000JE001244. <a href="https://doi.org/10.1029%2F2000JE001244" target="_blank">https://doi.org/10.1029%2F2000JE001244</a> <a href="#fnref:113" class="footnote-back-ref">↩</a></li>
<li id="fn:114">Gilmore, Martha; Treiman, Allan; Helbert, Jörn; Smrekar, Suzanne (November 2017). "Venus Surface Composition Constrained by Observation and Experiment". Space Science Reviews. 212 (3–4): 1511–1540. Bibcode:2017SSRv..212.1511G. doi:10.1007/s11214-017-0370-8. S2CID 126225959. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:114" class="footnote-back-ref">↩</a></li>
<li id="fn:115">Grotzinger, J. P. (26 September 2013). "Analysis of Surface Materials by the Curiosity Mars Rover". Science. 341 (6153): 1475. Bibcode:2013Sci...341.1475G. doi:10.1126/science.1244258. PMID 24072916. <a href="https://doi.org/10.1126%2Fscience.1244258" target="_blank">https://doi.org/10.1126%2Fscience.1244258</a> <a href="#fnref:115" class="footnote-back-ref">↩</a></li>
<li id="fn:116">Choi, Charles Q. (11 October 2012). "Meteorite's Black Glass May Reveal Secrets of Mars". Space.com. Future US, Inc. Retrieved 24 March 2021. <a href="http://www.space.com/18014-mars-meteorites-black-glass.html" target="_blank">http://www.space.com/18014-mars-meteorites-black-glass.html</a> <a href="#fnref:116" class="footnote-back-ref">↩</a></li>
<li id="fn:117">Gattacceca, Jérôme; Hewins, Roger H.; Lorand, Jean-Pierre; Rochette, Pierre; Lagroix, France; Cournède, Cécile; Uehara, Minoru; Pont, Sylvain; Sautter, Violaine; Scorzelli, Rosa. B.; Hombourger, Chrystel; Munayco, Pablo; Zanda, Brigitte; Chennaoui, Hasnaa; Ferrière, Ludovic (October 2013). "Opaque minerals, magnetic properties, and paleomagnetism of the Tissint Martian meteorite". Meteoritics & Planetary Science. 48 (10): 1919–1936. Bibcode:2013M&PS...48.1919G. doi:10.1111/maps.12172. <a href="/wiki/Violaine_Sautter" target="_blank">/wiki/Violaine_Sautter</a> <a href="#fnref:117" class="footnote-back-ref">↩</a></li>
<li id="fn:118">Binzel, Richard P; Gaffey, Michael J; Thomas, Peter C; Zellner, Benjamin H; Storrs, Alex D; Wells, Eddie N (July 1997). "Geologic Mapping of Vesta from 1994 Hubble Space Telescope Images". Icarus. 128 (1): 95–103. Bibcode:1997Icar..128...95B. doi:10.1006/icar.1997.5734. <a href="https://doi.org/10.1006%2Ficar.1997.5734" target="_blank">https://doi.org/10.1006%2Ficar.1997.5734</a> <a href="#fnref:118" class="footnote-back-ref">↩</a></li>
<li id="fn:119">Mittlefehldt, David W. (June 2015). "Asteroid (4) Vesta: I. The howardite-eucrite-diogenite (HED) clan of meteorites". Geochemistry. 75 (2): 155–183. Bibcode:2015ChEG...75..155M. doi:10.1016/j.chemer.2014.08.002. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:119" class="footnote-back-ref">↩</a></li>
<li id="fn:120">Moskovitz, Nicholas A.; Jedicke, Robert; Gaidos, Eric; Willman, Mark; Nesvorný, David; Fevig, Ronald; Ivezić, Željko (November 2008). "The distribution of basaltic asteroids in the Main Belt". Icarus. 198 (1): 77–90. arXiv:0807.3951. Bibcode:2008Icar..198...77M. doi:10.1016/j.icarus.2008.07.006. S2CID 38925782. <a href="/wiki/ArXiv_(identifier)" target="_blank">/wiki/ArXiv_(identifier)</a> <a href="#fnref:120" class="footnote-back-ref">↩</a></li>
<li id="fn:121">Keszthelyi, L.; McEwen, A. S.; Phillips, C. B.; Milazzo, M.; Geissler, P.; Turtle, E. P.; Radebaugh, J.; Williams, D. A.; Simonelli, D. P.; Breneman, H. H.; Klaasen, K. P.; Levanas, G.; Denk, T. (25 December 2001). "Imaging of volcanic activity on Jupiter's moon Io by Galileo during the Galileo Europa Mission and the Galileo Millennium Mission". Journal of Geophysical Research: Planets. 106 (E12): 33025–33052. Bibcode:2001JGR...10633025K. doi:10.1029/2000JE001383. <a href="/wiki/Cynthia_B._Phillips" target="_blank">/wiki/Cynthia_B._Phillips</a> <a href="#fnref:121" class="footnote-back-ref">↩</a></li>
<li id="fn:122">Battaglia, Steven M. (March 2019). A Jökulhlaup-like Model for Secondary Sulfur Flows on Io (PDF). 50th Lunar and Planetary Science Conference. 18–22 March 2019. The Woodlands, Texas. Bibcode:2019LPI....50.1189B. LPI Contribution No. 1189. <a href="https://www.hou.usra.edu/meetings/lpsc2019/pdf/1189.pdf" target="_blank">https://www.hou.usra.edu/meetings/lpsc2019/pdf/1189.pdf</a> <a href="#fnref:122" class="footnote-back-ref">↩</a></li>
<li id="fn:123">Keszthelyi, Laszlo; Jaeger, Windy; Milazzo, Moses; Radebaugh, Jani; Davies, Ashley Gerard; Mitchell, Karl L. (December 2007). "New estimates for Io eruption temperatures: Implications for the interior". Icarus. 192 (2): 491–502. Bibcode:2007Icar..192..491K. doi:10.1016/j.icarus.2007.07.008. <a href="https://zenodo.org/record/1259031" target="_blank">https://zenodo.org/record/1259031</a> <a href="#fnref:123" class="footnote-back-ref">↩</a></li>
<li id="fn:124">McEwen, A. S.; et al. (1998). "High-temperature silicate volcanism on Jupiter's moon Io". Science. 281 (5373): 87–90. Bibcode:1998Sci...281...87M. doi:10.1126/science.281.5373.87. PMID 9651251. S2CID 28222050. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:124" class="footnote-back-ref">↩</a></li>
<li id="fn:125">Keszthelyi, Laszlo; Jaeger, Windy; Milazzo, Moses; Radebaugh, Jani; Davies, Ashley Gerard; Mitchell, Karl L. (December 2007). "New estimates for Io eruption temperatures: Implications for the interior". Icarus. 192 (2): 491–502. Bibcode:2007Icar..192..491K. doi:10.1016/j.icarus.2007.07.008. <a href="https://zenodo.org/record/1259031" target="_blank">https://zenodo.org/record/1259031</a> <a href="#fnref:125" class="footnote-back-ref">↩</a></li>
<li id="fn:126">Battaglia 2019. - Battaglia, Steven M. (March 2019). A Jökulhlaup-like Model for Secondary Sulfur Flows on Io (PDF). 50th Lunar and Planetary Science Conference. 18–22 March 2019. The Woodlands, Texas. Bibcode:2019LPI....50.1189B. LPI Contribution No. 1189. <a href="https://www.hou.usra.edu/meetings/lpsc2019/pdf/1189.pdf" target="_blank">https://www.hou.usra.edu/meetings/lpsc2019/pdf/1189.pdf</a> <a href="#fnref:126" class="footnote-back-ref">↩</a></li>
<li id="fn:127">Blatt, Middleton & Murray 1980, pp. 254–257. - Blatt, Harvey; Middleton, Gerard; Murray, Raymond (1980). Origin of sedimentary rocks (2d ed.). Englewood Cliffs, N.J.: Prentice-Hall. ISBN 978-0-13-642710-0. <a href="#fnref:127" class="footnote-back-ref">↩</a></li>
<li id="fn:128">Mackin, J.H. (1961). "A stratigraphic section in the Yakima Basalt and the Ellensburg Formation in south-central Washington" (PDF). Washington Division of Mines and Geology Report of Investigations. 19. Archived (PDF) from the original on 24 January 2010. <a href="https://www.dnr.wa.gov/Publications/ger_ri19_strat_yakima_basalt_ellensburg_form.pdf" target="_blank">https://www.dnr.wa.gov/Publications/ger_ri19_strat_yakima_basalt_ellensburg_form.pdf</a> <a href="#fnref:128" class="footnote-back-ref">↩</a></li>
<li id="fn:129">"Holyoke Basalt". USGS Mineral Resources Program. United States Geological Survey. Retrieved 13 August 2020. <a href="https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=CTJho%3B0" target="_blank">https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=CTJho%3B0</a> <a href="#fnref:129" class="footnote-back-ref">↩</a></li>
<li id="fn:130">Anderson, J. L. (1987). "Geologic map of the Goldendale 15' quadrangle, Washington" (PDF). Washington Division of Geology and Earth Resources Open File Report. 87–15. Archived (PDF) from the original on 20 December 2009. Retrieved 13 August 2020. <a href="https://www.dnr.wa.gov/Publications/ger_ofr87-15_goldendale_39k.pdf" target="_blank">https://www.dnr.wa.gov/Publications/ger_ofr87-15_goldendale_39k.pdf</a> <a href="#fnref:130" class="footnote-back-ref">↩</a></li>
<li id="fn:131">Blatt, Middleton & Murray 1980, pp. 254–257. - Blatt, Harvey; Middleton, Gerard; Murray, Raymond (1980). Origin of sedimentary rocks (2d ed.). Englewood Cliffs, N.J.: Prentice-Hall. ISBN 978-0-13-642710-0. <a href="#fnref:131" class="footnote-back-ref">↩</a></li>
<li id="fn:132">Blatt, Middleton & Murray 1980, pp. 263–264. - Blatt, Harvey; Middleton, Gerard; Murray, Raymond (1980). Origin of sedimentary rocks (2d ed.). Englewood Cliffs, N.J.: Prentice-Hall. ISBN 978-0-13-642710-0. <a href="#fnref:132" class="footnote-back-ref">↩</a></li>
<li id="fn:133">Gillman, G. P.; Burkett, D. C.; Coventry, R. J. (August 2002). "Amending highly weathered soils with finely ground basalt rock". Applied Geochemistry. 17 (8): 987–1001. Bibcode:2002ApGC...17..987G. doi:10.1016/S0883-2927(02)00078-1. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:133" class="footnote-back-ref">↩</a></li>
<li id="fn:134">McGrail, B. Peter; Schaef, H. Todd; Ho, Anita M.; Chien, Yi-Ju; Dooley, James J.; Davidson, Casie L. (December 2006). "Potential for carbon dioxide sequestration in flood basalts: Sequestration in flood basalts". Journal of Geophysical Research: Solid Earth. 111 (B12): n/a. doi:10.1029/2005JB004169. <a href="https://doi.org/10.1029%2F2005JB004169" target="_blank">https://doi.org/10.1029%2F2005JB004169</a> <a href="#fnref:134" class="footnote-back-ref">↩</a></li>
<li id="fn:135">Blatt & Tracy 1996, chapter 22. - Blatt, Harvey; Tracy, Robert J. (1996). Petrology: igneous, sedimentary, and metamorphic (2nd ed.). New York: W.H. Freeman. ISBN 978-0-7167-2438-4. <a href="#fnref:135" class="footnote-back-ref">↩</a></li>
<li id="fn:136">Yardley, Bruce W. D.; Cleverley, James S. (2015). "The role of metamorphic fluids in the formation of ore deposits". Geological Society, London, Special Publications. 393 (1): 117–134. Bibcode:2015GSLSP.393..117Y. doi:10.1144/SP393.5. ISSN 0305-8719. S2CID 130626915. <a href="https://doi.org/10.1144%2FSP393.5" target="_blank">https://doi.org/10.1144%2FSP393.5</a> <a href="#fnref:136" class="footnote-back-ref">↩</a></li>
<li id="fn:137">Edwards, Katrina J.; Bach, Wolfgang; Rogers, Daniel R. (April 2003). "Geomicrobiology of the Ocean Crust: A Role for Chemoautotrophic Fe-Bacteria". Biological Bulletin. 204 (2): 180–185. doi:10.2307/1543555. JSTOR 1543555. PMID 12700150. S2CID 1717188. <a href="https://www.biodiversitylibrary.org/part/9233" target="_blank">https://www.biodiversitylibrary.org/part/9233</a> <a href="#fnref:137" class="footnote-back-ref">↩</a></li>
<li id="fn:138">Templeton, Alexis S.; Staudigel, Hubert; Tebo, Bradley M. (April 2005). "Diverse Mn(II)-Oxidizing Bacteria Isolated from Submarine Basalts at Loihi Seamount". Geomicrobiology Journal. 22 (3–4): 127–139. Bibcode:2005GmbJ...22..127T. doi:10.1080/01490450590945951. S2CID 17410610. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:138" class="footnote-back-ref">↩</a></li>
<li id="fn:139">Martin, William; Baross, John; Kelley, Deborah; Russell, Michael J. (November 2008). "Hydrothermal vents and the origin of life". Nature Reviews Microbiology. 6 (11): 805–814. Bibcode:2008NRvM....6..805M. doi:10.1038/nrmicro1991. PMID 18820700. S2CID 1709272. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:139" class="footnote-back-ref">↩</a></li>
<li id="fn:140">Raj, Smriti; Kumar, V Ramesh; Kumar, B H Bharath; Iyer, Nagesh R (January 2017). "Basalt: structural insight as a construction material". Sādhanā. 42 (1): 75–84. doi:10.1007/s12046-016-0573-9. <a href="https://doi.org/10.1007%2Fs12046-016-0573-9" target="_blank">https://doi.org/10.1007%2Fs12046-016-0573-9</a> <a href="#fnref:140" class="footnote-back-ref">↩</a></li>
<li id="fn:141">Yıldırım, Mücahit (January 2020). "Shading in the outdoor environments of climate-friendly hot and dry historical streets: The passageways of Sanliurfa, Turkey". Environmental Impact Assessment Review. 80: 106318. Bibcode:2020EIARv..8006318Y. doi:10.1016/j.eiar.2019.106318. <a href="https://doi.org/10.1016%2Fj.eiar.2019.106318" target="_blank">https://doi.org/10.1016%2Fj.eiar.2019.106318</a> <a href="#fnref:141" class="footnote-back-ref">↩</a></li>
<li id="fn:142">Aldred, Cyril (December 1955). "A Statue of King Neferkarē c Ramesses IX". The Journal of Egyptian Archaeology. 41 (1): 3–8. doi:10.1177/030751335504100102. S2CID 192232554. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:142" class="footnote-back-ref">↩</a></li>
<li id="fn:143">Roobaert, Arlette (1996). "A Neo-Assyrian Statue from Til Barsib". Iraq. 58: 79–87. doi:10.2307/4200420. JSTOR 4200420. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:143" class="footnote-back-ref">↩</a></li>
<li id="fn:144">"Research surveys for basalt rock quarries". Basalt Projects. <a href="http://basalt.pro/activities/materials/" target="_blank">http://basalt.pro/activities/materials/</a> <a href="#fnref:144" class="footnote-back-ref">↩</a></li>
<li id="fn:145">De Fazio, Piero. "Basalt fiber: from earth an ancient material for innovative and modern application". Italian national agency for new technologies, energy and sustainable economic development (in English and Italian). Archived from the original on 17 May 2019. Retrieved 17 December 2018. <a href="https://web.archive.org/web/20190517081412/http://www.enea.it/it/seguici/pubblicazioni/EAI/anno-2011/indice-world-view-3-2011/basalt-fiber-from-earth-an-ancient-material-for-innovative-and-modern-application/" target="_blank">https://web.archive.org/web/20190517081412/http://www.enea.it/it/seguici/pubblicazioni/EAI/anno-2011/indice-world-view-3-2011/basalt-fiber-from-earth-an-ancient-material-for-innovative-and-modern-application/</a> <a href="#fnref:145" class="footnote-back-ref">↩</a></li>
<li id="fn:146">Schut, Jan H. (August 2008). "Composites: Higher Properties, Lower Cost". www.ptonline.com. Retrieved 10 December 2017. <a href="http://www.ptonline.com/articles/composites-higher-properties-lower-cost" target="_blank">http://www.ptonline.com/articles/composites-higher-properties-lower-cost</a> <a href="#fnref:146" class="footnote-back-ref">↩</a></li>
<li id="fn:147">Ross, Anne (August 2006). "Basalt Fibers: Alternative To Glass?". www.compositesworld.com. Retrieved 10 December 2017. <a href="http://www.compositesworld.com/articles/basalt-fibers-alternative-to-glass" target="_blank">http://www.compositesworld.com/articles/basalt-fibers-alternative-to-glass</a> <a href="#fnref:147" class="footnote-back-ref">↩</a></li>
<li id="fn:148">Hance, Jeremy (5 January 2010). "Underwater rocks could be used for massive carbon storage on America's East Coast". Mongabay. Retrieved 4 November 2015. <a href="http://news.mongabay.com/2010/0104-hance_ccs.html" target="_blank">http://news.mongabay.com/2010/0104-hance_ccs.html</a> <a href="#fnref:148" class="footnote-back-ref">↩</a></li>
<li id="fn:149">Goldberg, D. S.; Takahashi, T.; Slagle, A. L. (22 July 2008). "Carbon dioxide sequestration in deep-sea basalt". Proceedings of the National Academy of Sciences. 105 (29): 9920–9925. Bibcode:2008PNAS..105.9920G. doi:10.1073/pnas.0804397105. PMC 2464617. PMID 18626013. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2464617" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2464617</a> <a href="#fnref:149" class="footnote-back-ref">↩</a></li>
</ol>

Basalt open-in-new

Basalt