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Ol Doinyo Lengai
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<h2 id="name">Name</h2> <p>The <a href="/facts/Maasai_people/35lLI3zL">Maasai</a> and <a href="/facts/Sonjo_people/EBBQHbjI">Sonjo</a> people refer to the volcano as "The Mountain of God", associated with a myth of the abode of the god <a href="/facts/Engai/PD18N1na">Engai</a>, who withdrew there after being hit by a hunter with an arrow.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> Other names are Basanjo, Donjo Ngai, Duenjo Ngai, Mongogogura, Mungogo wa Bogwe, and Oldonyo L'Engai.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> <h2 id="geography-and-geomorphology">Geography and geomorphology</h2> <p>Ol Doinyo Lengai lies in the <a href="/facts/Arusha/0lBPIC8x">Arusha</a> region of Tanzania,<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> 16 kilometres (9.9 mi) south of <a href="/facts/Lake_Natron/VAjwXTTg">Lake Natron</a><a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> and 120 kilometres (75 mi) northwest of the city of Arusha.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> The summit was first explored between 1904 and 1915.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> As of 2012, about 300,000 people live in the region, and livestock farming is the most important economic activity, although <a href="/facts/Tourism/x47vNhHj">tourism</a> is increasingly important.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> </p><p>Ol Doinyo Lengai is a symmetric cone<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> that rises more than 1,800 metres (5,900 ft) above the surrounding rift valley.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> It has two craters on either side of the mountain summit,<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a> which is formed by a 110-metre (360-foot) high ridge.<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a> The floor of the northern crater is covered with <a href="/facts/Lava_flow/q2an5SVN">lava flows</a> that resemble <a href="/facts/Pahoehoe/q2an5SVN">pahoehoe</a> lavas. Small cones<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a> with sizes ranging from 2 metres (6 ft 7 in) to over 10 metres (33 ft) occur in the crater and produce lava flows from their summits and, when they collapse, from their flanks.<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a> The southern crater is inactive and sometimes filled with water.<a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a> White <a href="/facts/Volcanic_ash/c3cqgBfV">volcanic ash</a> deposits cover the slopes of the volcano,<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a> which have large fractures on the western flank.<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a> There are <a href="/facts/Parasitic_vent/X6Ljtp8c">parasitic vents</a> on Ol Doinyo Lengai's flanks,<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a> such as Kirurum Crater on the western, the Nasira cones on the northern, Dorobo crater on the northeastern, and Oltatwa Crater on the eastern flank.<a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a> </p><p>There are deposits of past <a href="/facts/Debris_avalanche/sXSzA31e">debris avalanches</a> around the volcano, especially on its northern flank;<a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a> one such event has left a scar on the volcano's flanks.<a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a> Their occurrence may have been influenced by regional <a href="/facts/Fault_(geology)/0Fw2ladx">fault</a> systems.<a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a> </p> <h2 id="geology">Geology</h2> <p>Ol Doinyo Lengai is part of the <a href="/facts/Gregory_Rift/ajgxLsGk">Gregory Rift</a>,<a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a> which is part of the active <a href="/facts/East_African_Rift/o82Q47Uc">East African Rift</a>. The East African Rift is a <a href="/facts/Continental_rifting/FAWNKCGF">continental rift</a> extending from eastern to southern Africa over a length of 4,000 kilometres (2,500 mi),<a class="footnote-ref" id="fnref:24" href="#fn:24"><sup>24</sup></a> where there is high heat flow through a thinner <a href="/facts/Crust_(geology)/FYG1kP4F">crust</a>.<a class="footnote-ref" id="fnref:25" href="#fn:25"><sup>25</sup></a> In the Gregory Rift, spreading began about 1.2 million years ago<a class="footnote-ref" id="fnref:26" href="#fn:26"><sup>26</sup></a> and is ongoing at a rate of about 3 millimetres per year (0.12 in/year).<a class="footnote-ref" id="fnref:27" href="#fn:27"><sup>27</sup></a> The Natron <a href="/facts/Fault_(geology)/0Fw2ladx">Fault</a>, the western boundary of the Gregory Rift in the area, passes just southwest of the volcano.<a class="footnote-ref" id="fnref:28" href="#fn:28"><sup>28</sup></a> </p><p>The volcano is part of the <a href="/facts/Crater_Highlands/yQuw9reU">Ngorongoro volcanic highland</a>, a system of volcanoes that were active from the <a href="/facts/Miocene/cBRRzq4g">Miocene</a> to present, and which includes the <a href="/facts/Ngorongoro/yo9krX6Y">Ngorongoro</a> and other volcanoes.<a class="footnote-ref" id="fnref:29" href="#fn:29"><sup>29</sup></a> Over time, volcanic activity shifted northeastward to the present-day Ol Doinyo Lengai.<a class="footnote-ref" id="fnref:30" href="#fn:30"><sup>30</sup></a> Other volcanoes in the area are <a href="/facts/Gelai/H9XKtLPp">Gelai</a> to the northeast<a class="footnote-ref" id="fnref:31" href="#fn:31"><sup>31</sup></a> and Ketumbeine southeast of Ol Doinyo Lengai; further away are the <a href="/facts/Olduvai_Gorge/0bnoQHm5">Olduvai Gorge</a> to the west and <a href="/facts/Kilimanjaro/82wb2Xy0">Kilimanjaro</a> mountain east of the volcano.<a class="footnote-ref" id="fnref:32" href="#fn:32"><sup>32</sup></a> </p> <h3>Composition</h3> <p>Most of the volcanic cone is formed by <a href="/facts/Melilite/u9UrMaFf">melilite</a>, <a href="/facts/Nephelinite/C8VLgdF7">nephelinite</a>, and <a href="/facts/Phonolite/YEGwrroG">phonolite</a>.<a class="footnote-ref" id="fnref:33" href="#fn:33"><sup>33</sup></a><a class="footnote-ref" id="fnref:34" href="#fn:34"><sup>34</sup></a> Ol Doinyo Lengai is the only volcano on Earth known to have erupted <a href="/facts/Carbonatite/FQXo0Td3">carbonatitic</a> lavas<a class="footnote-ref" id="fnref:35" href="#fn:35"><sup>35</sup></a> during historical times,<a class="footnote-ref" id="fnref:36" href="#fn:36"><sup>36</sup></a> although these rocks make up only a small fraction of the volcano<a class="footnote-ref" id="fnref:37" href="#fn:37"><sup>37</sup></a> and only occur in the northern crater;<a class="footnote-ref" id="fnref:38" href="#fn:38"><sup>38</sup></a><a class="footnote-ref" id="fnref:39" href="#fn:39"><sup>39</sup></a> they only recently appeared on the volcano.<a class="footnote-ref" id="fnref:40" href="#fn:40"><sup>40</sup></a> The properties of Ol Doinyo Lengai's magmas have been used as an analogue for the conditions on <a href="/facts/Carbon_planet/KlAfSDWD">carbon planets</a>; these are planets which are rich in carbon.<a class="footnote-ref" id="fnref:41" href="#fn:41"><sup>41</sup></a> </p><p>Chemical composition: </p> <ul><li>The carbonatites contain a <a href="/facts/Groundmass/dDgk5G1H">groundmass</a> of <a href="/facts/Fluorite/y2G7C8zk">fluorite</a> and <a href="/facts/Sylvite/1q1ym0bQ">sylvite</a>, while <a href="/facts/Apatite/f5tYvl1n">apatite</a>, <a href="/facts/Galena/eSaK62FA">galena</a>, <a href="/facts/Magnetite/SVxoGUs2">magnetite</a>, <a href="/facts/Monticellite/FbkTx8tq">monticellite</a>, <a href="/facts/Sellaite/UFXFXcoT">sellaite</a>, and <a href="/facts/Sphalerite/5NumvnzR">sphalerite</a> form accessory components.<a class="footnote-ref" id="fnref:42" href="#fn:42"><sup>42</sup></a></li> <li>The silicic lavas contain <a href="/facts/Combeite/qHEt6cy9">combeite</a>, <a href="/facts/Ijolite/upc1mIYK">ijolites</a>, <a href="/facts/Melanite/pqYo9sBw">melanite</a>, <a href="/facts/Nepheline/2PXytbnE">nepheline</a>, <a href="/facts/Phlogopite/rTJ3HeFy">phlogopite</a>, and <a href="/facts/Pyroxene/hWMTLF9o">pyroxene</a>, as well as <a href="/facts/Apatite/f5tYvl1n">apatite</a>, <a href="/facts/Garnet/kqh2lWQI">garnet</a>, <a href="/facts/Sphene/h9l6Xqt8">sphene</a>, and <a href="/facts/Wollastonite/lgGWmUNQ">wollastonite</a>.<a class="footnote-ref" id="fnref:43" href="#fn:43"><sup>43</sup></a></li> <li><a href="/facts/Xenolith/nP1MlHvG">Xenoliths</a> from the <a href="/facts/Basement/kcYKBHUK">basement</a> have been found and consist of <a href="/facts/Gneiss/rUJYgBHu">gneiss</a> and other <a href="/facts/Metamorphic/JRp6dsCm">metamorphic</a> rocks,<a class="footnote-ref" id="fnref:44" href="#fn:44"><sup>44</sup></a> as well as <a href="/facts/Ijolite/upc1mIYK">ijolites</a>, <a href="/facts/Pyroxenite/orwgCqVw">pyroxenites</a>, and urtites.<a class="footnote-ref" id="fnref:45" href="#fn:45"><sup>45</sup></a></li></ul> <p>The carbonatite lavas are rapidly <a href="/facts/Weathering/uSYGlv0H">chemically modified</a> by rainfall<a class="footnote-ref" id="fnref:46" href="#fn:46"><sup>46</sup></a> or covered by deposits condensing from <a href="/facts/Fumarolic/BX3XEkj5">fumarolic</a> gases,<a class="footnote-ref" id="fnref:47" href="#fn:47"><sup>47</sup></a> yielding secondary minerals like <a href="/facts/Calcite/gKMHYQJo">calcite</a>, <a href="/facts/Gaylussite/L152P2er">gaylussite</a>, <a href="/facts/Nahcolite/IuPhA8BU">nahcolite</a>, pirssonite, <a href="/facts/Shortite/9KzydCTl">shortite</a>, <a href="/facts/Thermonatrite/5vhr7Up3">thermonatrite</a>, and <a href="/facts/Trona/lnkhuQAW">trona</a>,<a class="footnote-ref" id="fnref:48" href="#fn:48"><sup>48</sup></a> including various <a href="/facts/Chloride/m9NUaUDR">chlorides</a>, <a href="/facts/Fluoride/LpqNMzwa">fluorides</a>,<a class="footnote-ref" id="fnref:49" href="#fn:49"><sup>49</sup></a> and <a href="/facts/Sulfate/yuWVxsUf">sulfates</a>.<a class="footnote-ref" id="fnref:50" href="#fn:50"><sup>50</sup></a> These rocks form crusts on the lava flows and within <a href="/facts/Lava_tube/UmD2vNro">lava tubes</a>.<a class="footnote-ref" id="fnref:51" href="#fn:51"><sup>51</sup></a> Weathering on the silicic rocks has yielded <a href="/facts/Zeolith/SNrXy4v2">zeoliths</a>.<a class="footnote-ref" id="fnref:52" href="#fn:52"><sup>52</sup></a> </p><p>The chemical composition of the erupted rocks is not steady, with an increase of <a href="/facts/Silicic/x0Ulwsa9">silicic</a> magma emplacement noted after 2007–2008, after an episode of increased spreading in the Gregory Rift.<a class="footnote-ref" id="fnref:53" href="#fn:53"><sup>53</sup></a> The carbonatitic <a href="/facts/Magma/hRotHju9">magmas</a> appear to form through the separation of carbon-rich phases; the original magma is variously interpreted to be either <a href="/facts/Nephelinite/C8VLgdF7">nephelinitic</a> or silicic.<a class="footnote-ref" id="fnref:54" href="#fn:54"><sup>54</sup></a> The phonolites appear to have a separate origin from the other volcanic rocks.<a class="footnote-ref" id="fnref:55" href="#fn:55"><sup>55</sup></a> There appear to be two magma reservoirs under the volcano,<a class="footnote-ref" id="fnref:56" href="#fn:56"><sup>56</sup></a> and its plumbing system is complex, involving regional tectonic structures.<a class="footnote-ref" id="fnref:57" href="#fn:57"><sup>57</sup></a> </p> <h4>Volcanic gases</h4> <p><a href="/facts/Volcanic_gas/uu7qYRHS">Volcanic gas</a> sampled at Ol Doinyo Lengai consists mostly of water vapor and <a href="/facts/Carbon_dioxide/xGzpppEp">carbon dioxide</a> and originates in the <a href="/facts/Mantle_(geology)/RpDdtjCr">mantle</a>.<a class="footnote-ref" id="fnref:58" href="#fn:58"><sup>58</sup></a> The volcano is a major source of volcanic carbon dioxide, producing about 80 kilograms per second (11,000 lb/min) of CO2.<a class="footnote-ref" id="fnref:59" href="#fn:59"><sup>59</sup></a> </p> <h2 id="eruption-history">Eruption history</h2> <p><a href="/facts/Radiometric_date/bDFjdPqV">Radiometric dates</a> obtained by geologists for the start of volcanic eruptions at Ol Doinyo Lengai range from more than 500,000 to 22,000 years ago.<a class="footnote-ref" id="fnref:60" href="#fn:60"><sup>60</sup></a><a class="footnote-ref" id="fnref:61" href="#fn:61"><sup>61</sup></a> It formed in two stages, Lengai I consisting of phonolite that forms about 60% of the volume of Ol Doinyo Lengai and crops out in its southern part, and Lengai II formed by nephelinitic rocks;<a class="footnote-ref" id="fnref:62" href="#fn:62"><sup>62</sup></a><a class="footnote-ref" id="fnref:63" href="#fn:63"><sup>63</sup></a><a class="footnote-ref" id="fnref:64" href="#fn:64"><sup>64</sup></a> growth of the volcanic cone was complete about 15,000 years ago,<a class="footnote-ref" id="fnref:65" href="#fn:65"><sup>65</sup></a> when the Naisiusiu Beds were emplaced in the Olduvai Gorge.<a class="footnote-ref" id="fnref:66" href="#fn:66"><sup>66</sup></a> The volcano collapsed several times, including once between 850,000 and 135,000 years ago and another time between 50,000 and 10,000 years ago.<a class="footnote-ref" id="fnref:67" href="#fn:67"><sup>67</sup></a> The oldest natrocarbonatite lavas date to 1,250 years <a href="/facts/Before_present/BywUcMvW">before present</a>.<a class="footnote-ref" id="fnref:68" href="#fn:68"><sup>68</sup></a> An eruption 3,000-2,500 years <a href="/facts/Before_present/BywUcMvW">before present</a> produced a tephra fallout west of Ol Doinyo Lengai, that is presently being eroded by wind and forming <a href="/facts/Dune/Hq26h9hh">dunes</a> including the Shifting Sands of the Olduvai Gorge.<a class="footnote-ref" id="fnref:69" href="#fn:69"><sup>69</sup></a> A large eruption deposited the Namorod Ash in the gorge, about 1,250 years ago,<a class="footnote-ref" id="fnref:70" href="#fn:70"><sup>70</sup></a> and another about 600 years ago formed the so-called "Footprint Tuff".<a class="footnote-ref" id="fnref:71" href="#fn:71"><sup>71</sup></a> Ol Doinyo Lengai is the only presently active volcano of the Gregory Rift.<a class="footnote-ref" id="fnref:72" href="#fn:72"><sup>72</sup></a> </p><p>Records of eruptions go back to the 1880s.<a class="footnote-ref" id="fnref:73" href="#fn:73"><sup>73</sup></a><a class="footnote-ref" id="fnref:74" href="#fn:74"><sup>74</sup></a> The volcano is continually active, but there are seldom observations of its activity.<a class="footnote-ref" id="fnref:75" href="#fn:75"><sup>75</sup></a> It erupts <a href="/facts/Tephra/fYHmdLu1">tephra</a> and <a href="/facts/Lava_flow/q2an5SVN">lava flows</a><a class="footnote-ref" id="fnref:76" href="#fn:76"><sup>76</sup></a> from within the northern crater.<a class="footnote-ref" id="fnref:77" href="#fn:77"><sup>77</sup></a> During the middle 20th century, the crater was about 200 metres (660 ft) deep; subsequently, lava flows filled it, and by 1998, lava was overflowing its rims.<a class="footnote-ref" id="fnref:78" href="#fn:78"><sup>78</sup></a> The lava flows issue from cones within the crater and form lava ponds and lakes.<a class="footnote-ref" id="fnref:79" href="#fn:79"><sup>79</sup></a> <a href="/facts/Explosive_eruption/NkCmmgQG">Explosive eruptions</a> are less common, having been reported in 1917, 1940, 1966,<a class="footnote-ref" id="fnref:80" href="#fn:80"><sup>80</sup></a> 1983 and 1993.<a class="footnote-ref" id="fnref:81" href="#fn:81"><sup>81</sup></a><a class="footnote-ref" id="fnref:82" href="#fn:82"><sup>82</sup></a> Oversteepened slopes produce <a href="/facts/Landslide/sXSzA31e">landslides</a>,<a class="footnote-ref" id="fnref:83" href="#fn:83"><sup>83</sup></a> and erosion has cut <a href="/facts/Gullies/hXJlBneY">gullies</a> into volcanic deposits.<a class="footnote-ref" id="fnref:84" href="#fn:84"><sup>84</sup></a> Steam jets have also been observed.<a class="footnote-ref" id="fnref:85" href="#fn:85"><sup>85</sup></a> </p><p>There is evidence of underground <a href="/facts/Magma/hRotHju9">magma</a> intrusions.<a class="footnote-ref" id="fnref:86" href="#fn:86"><sup>86</sup></a> Satellite observations have shown deformation of the volcano during eruptions,<a class="footnote-ref" id="fnref:87" href="#fn:87"><sup>87</sup></a> and ground-based observations have identified movement in neighboring <a href="/facts/Fault_(geology)/0Fw2ladx">fault</a> systems such as the Natron Fault caused by magma originating at Ol Doinyo Lengai.<a class="footnote-ref" id="fnref:88" href="#fn:88"><sup>88</sup></a> </p> <h3>Recent eruptive period: 1983 and subsequent</h3> <p>After a phase of quiescence,<a class="footnote-ref" id="fnref:89" href="#fn:89"><sup>89</sup></a> renewed activity commenced in 1983 and continues<a class="footnote-ref" id="fnref:90" href="#fn:90"><sup>90</sup></a> with several interruptions to this day.<a class="footnote-ref" id="fnref:91" href="#fn:91"><sup>91</sup></a> During the 1983 eruption, ashfall occurred at tens of kilometers from the volcano.<a class="footnote-ref" id="fnref:92" href="#fn:92"><sup>92</sup></a> The emission of a lava flow onto the western flank of Ol Doinyo Lengai in 2006 was accompanied by the formation of a <a href="/facts/Pit_crater/RA5BXBk7">pit crater</a> on the summit.<a class="footnote-ref" id="fnref:93" href="#fn:93"><sup>93</sup></a> </p><p>A large <a href="/facts/Explosive_eruption/NkCmmgQG">explosive eruption</a> began on the 4 September 2007, producing a 3-kilometre (1.9 mi)-high <a href="/facts/Eruption_column/KouHPD3E">eruption column</a><a class="footnote-ref" id="fnref:94" href="#fn:94"><sup>94</sup></a> and a new crater 100 metres (330 ft) deep and 300 metres (980 ft) wide.<a class="footnote-ref" id="fnref:95" href="#fn:95"><sup>95</sup></a> The explosive activity continued into 2008, when the volcano settled back into the effusion of lava flows;<a class="footnote-ref" id="fnref:96" href="#fn:96"><sup>96</sup></a> a <a href="/facts/Cinder_cone/fE4dGJX7">cinder cone</a> formed in the northern crater during the eruption.<a class="footnote-ref" id="fnref:97" href="#fn:97"><sup>97</sup></a> <a href="/facts/Aerosol/X1jXFLp2">Aerosol</a> clouds from the eruption<a class="footnote-ref" id="fnref:98" href="#fn:98"><sup>98</sup></a> extended over east Africa.<a class="footnote-ref" id="fnref:99" href="#fn:99"><sup>99</sup></a> The 2007 eruptions forced the evacuation of three villages<a class="footnote-ref" id="fnref:100" href="#fn:100"><sup>100</sup></a> and disturbed <a href="/facts/Air_travel/unbhGQTk">air travel</a> in the touristically important area;<a class="footnote-ref" id="fnref:101" href="#fn:101"><sup>101</sup></a> livestock fatalities and injuries to people led to requests that the <a href="/facts/Government_of_Tanzania/8yR8fUQo">government of Tanzania</a> enact access restrictions to the volcano<a class="footnote-ref" id="fnref:102" href="#fn:102"><sup>102</sup></a> and to increased awareness of the threat formed by the volcano.<a class="footnote-ref" id="fnref:103" href="#fn:103"><sup>103</sup></a> Wild animals such as <a href="/facts/Flamingo/l97N685y">flamingos</a> were also impacted by the eruption.<a class="footnote-ref" id="fnref:104" href="#fn:104"><sup>104</sup></a> The eruption was preceded in July by <a href="/facts/Seismic/Lony1LYX">seismic</a> activity, which was frequently mistaken for renewed eruptions,<a class="footnote-ref" id="fnref:105" href="#fn:105"><sup>105</sup></a> and the intrusion of a <a href="/facts/Dike_(geology)/jf8vsEHx">dyke</a> less than 20 kilometres (12 mi) from Ol Doinyo Lengai.<a class="footnote-ref" id="fnref:106" href="#fn:106"><sup>106</sup></a> </p> <h3>General appearance of lava flows</h3> <p>Lavas erupted by Ol Doinyo Lengai initially have brown or black colors, but within days<a class="footnote-ref" id="fnref:107" href="#fn:107"><sup>107</sup></a> to hours become white like snow.<a class="footnote-ref" id="fnref:108" href="#fn:108"><sup>108</sup></a> The lavas of Ol Doinyo Lengai have temperatures of 540–593 °C (1,004–1,099 °F);<a class="footnote-ref" id="fnref:109" href="#fn:109"><sup>109</sup></a> they are so cold that during the day they look like <a href="/facts/Mudflow/Ko4Hf2F7">mudflows</a><a class="footnote-ref" id="fnref:110" href="#fn:110"><sup>110</sup></a> or oil and glow only during the night.<a class="footnote-ref" id="fnref:111" href="#fn:111"><sup>111</sup></a> They are highly fluid (reaching flow speeds of 1–5 metres per second (3.3–16.4 ft/s),<a class="footnote-ref" id="fnref:112" href="#fn:112"><sup>112</sup></a> making them the most liquid of all known lavas, and form short (few tens of meters) and thin (few centimeters thick) lava flows.<a class="footnote-ref" id="fnref:113" href="#fn:113"><sup>113</sup></a> More viscous flows containing silicic rocks have also been observed, for example during the 1993 eruption.<a class="footnote-ref" id="fnref:114" href="#fn:114"><sup>114</sup></a> </p> <h3>Hazards</h3> <p>Potential threats from Ol Doinyo Lengai eruptions are scarcely established.<a class="footnote-ref" id="fnref:115" href="#fn:115"><sup>115</sup></a> Threats from eruptions at Ol Doinyo Lengai include <a href="/facts/Lahar/WM2kUufP">lahars</a>, <a href="/facts/Landslide/sXSzA31e">landslides</a>, <a href="/facts/Lava_flow/q2an5SVN">lava flows</a>, <a href="/facts/Pyroclastic_flow/72eP2PtH">pyroclastic flows</a>, <a href="/facts/Volcanic_bomb/HoA9ACDR">volcanic bombs</a>, <a href="/facts/Volcanic_gas/uu7qYRHS">volcanic gas</a>, and <a href="/facts/Volcanic_ash/c3cqgBfV">volcanic ash</a> fall.<a class="footnote-ref" id="fnref:116" href="#fn:116"><sup>116</sup></a><a class="footnote-ref" id="fnref:117" href="#fn:117"><sup>117</sup></a> Beginning in 2016, the volcano is being monitored by a <a href="/facts/Seismometer/CCc9vwqf">seismometer</a> and <a href="/facts/GNSS/lVgPlF5v">GNSS</a> stations.<a class="footnote-ref" id="fnref:118" href="#fn:118"><sup>118</sup></a> </p> <h2 id="climate-and-vegetation">Climate and vegetation</h2> <p>Vegetation in the area consists mostly of grassland, which reaches an elevation of 1,750 metres (5,740 ft) above sea level.<a class="footnote-ref" id="fnref:119" href="#fn:119"><sup>119</sup></a> <a href="/facts/Volcanic_ash/c3cqgBfV">Volcanic ash</a> from Ol Doinyo Lengai influences the surrounding landscape, favoring the growth of nutrient-rich plants.<a class="footnote-ref" id="fnref:120" href="#fn:120"><sup>120</sup></a> Precipitation falls during two <a href="/facts/Wet_season/k3xU5RU4">wet seasons</a> in March–May and October–December.<a class="footnote-ref" id="fnref:121" href="#fn:121"><sup>121</sup></a> </p> <h2 id="gallery">Gallery</h2> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/List_of_volcanoes_in_Tanzania/a52pNGMs">List of volcanoes in Tanzania</a></li></ul> <h2 id="notes">Notes</h2> <h3>Sources</h3> <ul><li>Bernbaum, Edwin (10 March 2022). <a href="https://www.cambridge.org/core/product/identifier/9781108873307/type/book"><i>Sacred Mountains of the World</i></a> (2 ed.). Cambridge University Press. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1017%2F9781108873307.010">10.1017/9781108873307.010</a>. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-1-108-87330-7.</li> <li>Biggs, Juliet; Ayele, Atalay; Fischer, Tobias P.; Fontijn, Karen; Hutchison, William; Kazimoto, Emmanuel; Whaler, Kathy; Wright, Tim J. (25 November 2021). <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8616933">"Volcanic activity and hazard in the East African Rift Zone"</a>. <i>Nature Communications</i>. 12 (1): 6881. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2021NatCo..12.6881B">2021NatCo..12.6881B</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1038%2Fs41467-021-27166-y">10.1038/s41467-021-27166-y</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/2041-1723">2041-1723</a>. <a href="/facts/PMC_(identifier)/dX1zMt71">PMC</a> <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8616933">8616933</a>. <a href="/facts/PMID_(identifier)/JlHAvMHt">PMID</a> <a href="https://pubmed.ncbi.nlm.nih.gov/34824232">34824232</a>.</li> <li>Daud Masungulwa, Ntambila Simon; Stamps, D. Sarah; Battaglia, Maurizio; Huang, Mong-Han; Saria, Elifuraha; Ji, Kang Hyeun; Popolizio, Kelsey (1 December 2021). <a href="https://ui.adsabs.harvard.edu/abs/2021AGUFM.G24B..05D/abstract"><i>Elucidating the Magma Plumbing System of the Active Volcano Ol Doinyo Lengai, Natron Rift, Tanzania Using Geodesy and Numerical Modeling</i></a>. AGU Fall Meeting 2021. Vol. 2021. pp. G24B–05. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2021AGUFM.G24B..05D">2021AGUFM.G24B..05D</a>.</li> <li>Dawson, J. B.; Pinkerton, H.; Pyle, D. M.; Nyamweru, C. (1994). <a href="https://pubs.geoscienceworld.org/gsa/geology/article-abstract/22/9/799/206195/June-1993-eruption-of-Oldoinyo-Lengai-Tanzania">"June 1993 eruption of Oldoinyo Lengai, Tanzania: exceptionally viscous and large carbonatite lava flows and evidence for coexisting silicate and carbonate magmas"</a>. <i>Geology</i>. 22 (9): 799–802. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1994Geo....22..799D">1994Geo....22..799D</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1130%2F0091-7613%281994%29022%3C0799%3AJEOOLT%3E2.3.CO%3B2">10.1130/0091-7613(1994)022<0799:JEOOLT>2.3.CO;2</a>.</li> <li>Delcamp, A.; Delvaux, D.; Kwelwa, S.; Macheyeki, A.; Kervyn, M. (30 June 2015). <a href="https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174">"Sector collapse events at volcanoes in the North Tanzanian divergence zone and their implications for regional tectonics"</a>. <i>Geological Society of America Bulletin</i>. 128 (1–2): 169–186. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1130%2FB31119.1">10.1130/B31119.1</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/0016-7606">0016-7606</a> – via <a href="/facts/ResearchGate/tyxv0zvV">ResearchGate</a>.</li> <li>Dye, Mike; Stamps, D. Sarah; Mason, Myles; Saria, Elifuraha (1 March 2022). <a href="https://www.worldscientific.com/doi/10.1142/S1793351X22400025">"Toward Autonomous Detection of Anomalous GNSS Data Via Applied Unsupervised Artificial Intelligence"</a>. <i>International Journal of Semantic Computing</i>. 16 (1): 29–45. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1142%2FS1793351X22400025">10.1142/S1793351X22400025</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/1793-351X">1793-351X</a>.</li> <li>Fischer, T.; Burnard, P.; Marty, B.; Palhol, F.; Mangasini, F.; Shaw, A. M. (1 December 2006). <a href="https://ui.adsabs.harvard.edu/abs/2006AGUFM.V14B..04F/abstract"><i>The 2005 and 2006 eruptions of Ol Doinyo Lengai: assessing deep and shallow processes at an active carbonatite volcano using volatile chemistry and fluxes</i></a>. American Geophysical Union, Fall Meeting 2006. Vol. 2006. pp. V14B–04. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2006AGUFM.V14B..04F">2006AGUFM.V14B..04F</a>.</li> <li>Gilbert, C.D.; Williams-Jones, A.E. (October 2008). "Vapour transport of rare earth elements (REE) in volcanic gas: Evidence from encrustations at Oldoinyo Lengai". <i>Journal of Volcanology and Geothermal Research</i>. 176 (4): 519–528. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2008JVGR..176..519G">2008JVGR..176..519G</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2Fj.jvolgeores.2008.05.003">10.1016/j.jvolgeores.2008.05.003</a>.</li> <li><a href="https://volcano.si.edu/volcano.cfm?vn=222120">"Ol Doinyo Lengai"</a>. <i><a href="/facts/Global_Volcanism_Program/seWCysIn">Global Volcanism Program</a></i>. <a href="/facts/Smithsonian_Institution/pqC74ta9">Smithsonian Institution</a>. Retrieved 14 March 2023.</li> <li>Hay, Richard L. (1 March 1989). <a href="https://www.sciencedirect.com/science/article/abs/pii/0377027389901145">"Holocene carbonatite-nephelinite tephra deposits of Oldoinyo Lengai, Tanzania"</a>. <i>Journal of Volcanology and Geothermal Research</i>. 37 (1): 77–91. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1989JVGR...37...77H">1989JVGR...37...77H</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2F0377-0273%2889%2990114-5">10.1016/0377-0273(89)90114-5</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/0377-0273">0377-0273</a>.</li> <li>Ho, C.; Wauthier, C. (December 2022). <i>Magmatic Processes in the Naibor Soito Distributed Volcanic Field, Tanzania Constrained from Satellite Geodesy and Seismicity</i>. AGU Fall Meeting 2022.</li> <li>Jones, J. Robert; Stamps, D. Sarah; Wauthier, Christelle; Saria, Elifuraha; Biggs, Juliet (May 2019). <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165">"Evidence for Slip on a Border Fault Triggered by Magmatic Processes in an Immature Continental Rift"</a>. <i>Geochemistry, Geophysics, Geosystems</i>. 20 (5): 2515–2530. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2019GGG....20.2515J">2019GGG....20.2515J</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1029%2F2018GC008165">10.1029/2018GC008165</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/1525-2027">1525-2027</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:135138771">135138771</a>.</li> <li>Keller, Jörg; Krafft, Maurice (November 1990). "Effusive natrocarbonatite activity of Oldoinyo Lengai, June 1988". <i>Bulletin of Volcanology</i>. 52 (8): 629–645. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1990BVol...52..629K">1990BVol...52..629K</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1007%2FBF00301213">10.1007/BF00301213</a>.</li> <li>Kervyn, Matthieu; Ernst, Gerald G. J.; Keller, Jörg; Vaughan, R. Greg; Klaudius, Jurgis; Pradal, Evelyne; Belton, Frederic; Mattsson, Hannes B.; Mbede, Evelyne; Jacobs, Patric (1 October 2010). <a href="https://link.springer.com/article/10.1007/s00445-010-0360-0">"Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania"</a>. <i>Bulletin of Volcanology</i>. 72 (8): 913–931. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1007%2Fs00445-010-0360-0">10.1007/s00445-010-0360-0</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/1432-0819">1432-0819</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:128562764">128562764</a>.</li> <li>Klaudius, J; Keller, J (October 2006). "Peralkaline silicate lavas at Oldoinyo Lengai, Tanzania". <i>Lithos</i>. 91 (1–4): 173–190. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2006Litho..91..173K">2006Litho..91..173K</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2Fj.lithos.2006.03.017">10.1016/j.lithos.2006.03.017</a>.</li> <li>Laxton, Kate (September 2020). <a href="https://www.nature.com/articles/s43017-020-0089-z">"Collection of lava samples from Ol Doinyo Lengai"</a>. <i>Nature Reviews Earth & Environment</i>. 1 (9): 438. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2020NRvEE...1..438L">2020NRvEE...1..438L</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1038%2Fs43017-020-0089-z">10.1038/s43017-020-0089-z</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/2662-138X">2662-138X</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:220856786">220856786</a>.</li> <li>Makongoro, Mohamed Zengo; Vegi, Maheswara Rao; Vuai, Said Ali Hamad; Msabi, Michael Mwita (1 December 2022). <a href="https://doi.org/10.14746%2Flogos.2022.28.3.0003">"Radiometric dating of the Ootun palaeosol and its implication for the age of the Shifting Sand in Ngorongoro Lengai Geopark (Arusha, Tanzania)"</a>. <i>Geologos</i> (in Spanish). 28 (3): 203–215. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2022Geolg..28..203M">2022Geolg..28..203M</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.14746%2Flogos.2022.28.3.0003">10.14746/logos.2022.28.3.0003</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:256941631">256941631</a>.</li> <li>Mangler, Martin F.; Marks, Michael A.W.; Zaitzev, Anatoly N.; Eby, G. Nelson; Markl, Gregor (February 2014). "Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite". <i>Chemical Geology</i>. 365: 43–53. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M">2014ChGeo.365...43M</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2Fj.chemgeo.2013.11.027">10.1016/j.chemgeo.2013.11.027</a>.</li> <li>McFarlane, D. A.; Lundberg, J.; Belton, F. (2004). <a href="https://scholarship.claremont.edu/wmkeckscience/58/">"An unusual lava cave from Ol Doinyo lengai, Tanzania"</a>. <i>Journal of Cave and Karst Studies</i>. 66 (3): 98–101.</li> <li>Meshili, Valerie Ayubu; Kwon, Jay Hyoun (2020). <a href="https://koreascience.kr/article/JAKO202031837625706.page">"Crustal Movement at Ol Doinyo Lengai based on GPS Measurements"</a>. <i>Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography</i>. 38 (5): 401–406. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.7848%2Fksgpc.2020.38.5.401">10.7848/ksgpc.2020.38.5.401</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/1598-4850">1598-4850</a>.</li> <li>Mollel, Godwin F.; Swisher, Carl C. (August 2012). "The Ngorongoro Volcanic Highland and its relationships to volcanic deposits at Olduvai Gorge and East African Rift volcanism". <i>Journal of Human Evolution</i>. 63 (2): 274–283. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M">2012JHumE..63..274M</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2Fj.jhevol.2011.09.001">10.1016/j.jhevol.2011.09.001</a>. <a href="/facts/PMID_(identifier)/JlHAvMHt">PMID</a> <a href="https://pubmed.ncbi.nlm.nih.gov/22404967">22404967</a>.</li> <li>Morogan, Viorica; Martin, Robert F. (1985). <a href="https://pubs.geoscienceworld.org/msa/ammin/article-abstract/70/11-12/1114/41675/Mineralogy-and-partial-melting-of-fenitized">"Mineralogy and partial melting of fenitized crustal xenoliths in the Oldoinyo Lengai carbonatitic volcano, Tanzania"</a>. <i>American Mineralogist</i>. 70 (11–12): 1114–1126.</li> <li>Morrison, Thomas A.; Bolger, Douglas T. (October 2014). <a href="https://www.cambridge.org/core/services/aop-cambridge-core/content/view/A596D0B568450D61DF2A2FDDC581F220/S0030605313000537a.pdf/connectivity-and-bottlenecks-in-a-migratory-wildebeest-connochaetes-taurinus-population.pdf">"Connectivity and bottlenecks in a migratory wildebeest Connochaetes taurinus population"</a> (PDF). <i>Oryx</i>. 48 (4): 613–621. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1017%2FS0030605313000537">10.1017/S0030605313000537</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:84758096">84758096</a>.</li> <li>Muthama, N. J.; Mathu, E.M.; Kamau, G. N. (December 2012). <a href="http://erepository.uonbi.ac.ke/handle/11295/36396">"An investigation of the transport and dispersion of atmospheric pollutants over east Africa during the Ol doinyo lengai volcanic eruption in July 2007 and march 2008"</a>. <i>International Journal of BioChemiPhysics</i>. 20: 7–16. Retrieved 14 March 2023.</li> <li>Nyamweru, Celia (1 January 1988). <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536288901108">"Activity of Ol Doinyo Lengai volcano, Tanzania, 1983–1987"</a>. <i>Journal of African Earth Sciences (and the Middle East)</i>. 7 (4): 603–610. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1988JAfES...7..603N">1988JAfES...7..603N</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2F0899-5362%2888%2990110-8">10.1016/0899-5362(88)90110-8</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/0899-5362">0899-5362</a>.</li> <li>Nyamweru, C (1 January 1990). <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536290900179">"Observations on changes in the active crater of Ol Doinyo Lengai from 1960 to 1988"</a>. <i>Journal of African Earth Sciences (and the Middle East)</i>. 11 (3): 385–390. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1990JAfES..11..385N">1990JAfES..11..385N</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2F0899-5362%2890%2990017-9">10.1016/0899-5362(90)90017-9</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/0899-5362">0899-5362</a>.</li> <li>Oppenheimer, C. (January 1998). "Satellite observation of active carbonatite volcanism at Ol Doinyo Lengai, Tanzania". <i>International Journal of Remote Sensing</i>. 19 (1): 55–64. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O">1998IJRS...19...55O</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1080%2F014311698216422">10.1080/014311698216422</a>.</li> <li>Radebaugh, J.; Barnes, R.; Keith, J. (1 February 2020). <a href="https://ui.adsabs.harvard.edu/abs/2020LPICo2195.3070R/abstract"><i>The Ol Doinyo Lengai Volcano, Tanzania, as an Analogue for Carbon Planets</i></a>. Exoplanets in Our Backyard: Solar System and Exoplanet Synergies on Planetary Formation, Evolution, and Habitability. Vol. 2195. p. 3070. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2020LPICo2195.3070R">2020LPICo2195.3070R</a>.</li> <li>Rey, Tony; Leone, Frederic; Defossez, Stéphanie; Gherardi, Monique; Parat, Fleurice (7 July 2021). <a href="https://impactum-journals.uc.pt/territorium/article/view/9555">"Volcanic hazards assessment of Oldoinyo Lengai in a data scarcity context (Tanzania)"</a>. <i>Territorium</i> (28(II)): 69–81. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.14195%2F1647-7723_28-2_6">10.14195/1647-7723_28-2_6</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/1647-7723">1647-7723</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:237769341">237769341</a>.</li> <li>Robertson, C. H.; Harpp, K. S.; Geist, D.; Bosselait, M. (1 December 2014). <a href="https://ui.adsabs.harvard.edu/abs/2014AGUFM.V51C4765R/abstract"><i>Preferential Weathering of Carbonatite Lava at Ol Doinyo Lengai, Tanzania</i></a>. American Geophysical Union, Fall Meeting 2014. Vol. 2014. pp. V51C–4765. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2014AGUFM.V51C4765R">2014AGUFM.V51C4765R</a>.</li> <li>Sekisova, V.S.; Sharygin, V.V.; Zaitsev, A.N.; Strekopytov, S. (1 December 2015). <a href="https://www.sciencedirect.com/science/article/abs/pii/S1068797115002552">"Liquid immiscibility during crystallization of forsterite–phlogopite ijolites at Oldoinyo Lengai Volcano, Tanzania: study of melt inclusions"</a>. <i>Russian Geology and Geophysics</i>. 56 (12): 1717–1737. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2015RuGG...56.1717S">2015RuGG...56.1717S</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1016%2Fj.rgg.2015.11.005">10.1016/j.rgg.2015.11.005</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/1068-7971">1068-7971</a>.</li> <li>Vye-Brown, C.; Crummy, J.; Smith, K.; Mruma, A.; Kabelwa, H. (2014). <a href="https://nora.nerc.ac.uk/id/eprint/506873/">"Volcanic hazards in Tanzania"</a>.</li> <li>Zaitsev, A. N.; Keller, J.; Billström, K. (1 March 2009). <a href="https://link.springer.com/article/10.1134/S1028334X09020287">"Isotopic composition of Sr, Nd, and Pb in pirssonite, shortite and calcite carbonatites from Oldoinyo Lengai volcano, Tanzania"</a>. <i>Doklady Earth Sciences</i>. 425 (1): 302–306. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2009DokES.425..302Z">2009DokES.425..302Z</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1134%2FS1028334X09020287">10.1134/S1028334X09020287</a>. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/1531-8354">1531-8354</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:129339452">129339452</a>.</li></ul> <h2 id="external-links">External links</h2> <ul><li>Anderson, H. (2005). <a href="http://www.hugh360.co.uk/wp-content/uploads/2017/05/Reporter_52_english.pdf">"Young Explorers survey Tanzanian volcano—Ol Doinyo Lengai"</a> (PDF). <i>The Magazine of Leica Geosystems, Reporter</i>. Vol. 52. pp. 4–8.</li> <li>Lagendijk, Carla (1 January 2012). <a href="https://natuurtijdschriften.nl/pub/1000154">"Een zeldzame vulkaan in Afrika"</a>. <i>Grondboor & Hamer</i> (in Dutch). 66 (4/5): 426–430. <a href="/facts/ISSN_(identifier)/DPAflDvU">ISSN</a> <a href="https://search.worldcat.org/issn/0017-4505">0017-4505</a>.</li> <li><a href="http://oldoinyolengai.pbworks.com/w/page/33191422/Ol%20Doinyo%20Lengai%2C%20The%20Mountain%20of%20God">Ol Doinyo Lengai, The Mountain of God </a></li> <li>Stamps, D. Sarah; Saria, Elifuraha; Hyeun Ji, Kang; Jones, J. Robert; Ntambila, Daud; Daniels, Mike; Mencin, Dave (2017). TZVOLCANO - OLO8-OLO8_OLO_TZA2017 P.S., The GAGE Facility operated by UNAVCO, Inc., GPS/GNSS Observations Dataset (Report). Unavco. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.7283%2FT59C6W64">10.7283/T59C6W64</a>.</li></ul> Wikimedia Commons has media related to Ol Doinyo Lengai. <ul><li><a href="https://web.archive.org/web/20080118152208/http://ngm.nationalgeographic.com/ngm/0301/feature2/">Ol Doinyo Lengai at nationalgeographic.com</a></li> <li><a href="http://www.swisseduc.ch/stromboli/perm/lengai">Ol Doinyo Lengai at Stromboli Online</a></li> <li><a href="http://volcano.oregonstate.edu/ol-doinyo-lengai">Ol Doinyo Lengai at Volcano World</a></li> <li><a href="http://it.stlawu.edu/~cnya/">St Lawrence University <i>Oldoinyo Lengai</i></a></li> <li><a href="http://www.oldoinyolengai.pbworks.com"><i>Fred Belton's Ol Doinyo Lengai site</i></a></li> <li><a href="https://www.flickr.com/photos/volcanoimage/sets/72157644798933271"><i>Ol Doinyo Lengai Photos 2001</i></a></li> <li><a href="http://www.volcanodiscovery.com/volcano-tours/news/tanzania/lengai_volcano.html">Volcano Discovery <i>Ol Doinyo Lengai volcano, Tanzania</i></a></li> <li><a href="https://www.youtube.com/watch?v=qputaVyn7TE">Video of molten carbonatite lava flow eruptions at Ol Doinyo Lengai volcano</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Keller & Krafft 1990, p. 629. - Keller, Jörg; Krafft, Maurice (November 1990). "Effusive natrocarbonatite activity of Oldoinyo Lengai, June 1988". Bulletin of Volcanology. 52 (8): 629–645. Bibcode:1990BVol...52..629K. doi:10.1007/BF00301213. <a href="https://ui.adsabs.harvard.edu/abs/1990BVol...52..629K" target="_blank">https://ui.adsabs.harvard.edu/abs/1990BVol...52..629K</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Bernbaum 2022, p. 183. - Bernbaum, Edwin (10 March 2022). Sacred Mountains of the World (2 ed.). Cambridge University Press. doi:10.1017/9781108873307.010. ISBN 978-1-108-87330-7. <a href="https://www.cambridge.org/core/product/identifier/9781108873307/type/book" target="_blank">https://www.cambridge.org/core/product/identifier/9781108873307/type/book</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>GVP 2023, Synonyms & Subfeatures. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>McFarlane, Lundberg & Belton 2004, p. 98. - McFarlane, D. A.; Lundberg, J.; Belton, F. (2004). "An unusual lava cave from Ol Doinyo lengai, Tanzania". Journal of Cave and Karst Studies. 66 (3): 98–101. <a href="https://scholarship.claremont.edu/wmkeckscience/58/" target="_blank">https://scholarship.claremont.edu/wmkeckscience/58/</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Mangler et al. 2014, p. 43. - Mangler, Martin F.; Marks, Michael A.W.; Zaitzev, Anatoly N.; Eby, G. Nelson; Markl, Gregor (February 2014). "Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite". Chemical Geology. 365: 43–53. Bibcode:2014ChGeo.365...43M. doi:10.1016/j.chemgeo.2013.11.027. <a href="https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M" target="_blank">https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Muthama, Mathu & Kamau 2012, p. 8. - Muthama, N. J.; Mathu, E.M.; Kamau, G. N. (December 2012). "An investigation of the transport and dispersion of atmospheric pollutants over east Africa during the Ol doinyo lengai volcanic eruption in July 2007 and march 2008". International Journal of BioChemiPhysics. 20: 7–16. Retrieved 14 March 2023. <a href="http://erepository.uonbi.ac.ke/handle/11295/36396" target="_blank">http://erepository.uonbi.ac.ke/handle/11295/36396</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Zaitsev, Keller & Billström 2009, p. 303. - Zaitsev, A. N.; Keller, J.; Billström, K. (1 March 2009). "Isotopic composition of Sr, Nd, and Pb in pirssonite, shortite and calcite carbonatites from Oldoinyo Lengai volcano, Tanzania". Doklady Earth Sciences. 425 (1): 302–306. Bibcode:2009DokES.425..302Z. doi:10.1134/S1028334X09020287. ISSN 1531-8354. S2CID 129339452. <a href="https://link.springer.com/article/10.1134/S1028334X09020287" target="_blank">https://link.springer.com/article/10.1134/S1028334X09020287</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Rey et al. 2021, p. 72. - Rey, Tony; Leone, Frederic; Defossez, Stéphanie; Gherardi, Monique; Parat, Fleurice (7 July 2021). "Volcanic hazards assessment of Oldoinyo Lengai in a data scarcity context (Tanzania)". Territorium (28(II)): 69–81. doi:10.14195/1647-7723_28-2_6. ISSN 1647-7723. S2CID 237769341. <a href="https://impactum-journals.uc.pt/territorium/article/view/9555" target="_blank">https://impactum-journals.uc.pt/territorium/article/view/9555</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>GVP 2023, General Information. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Nyamweru 1988, p. 603. - Nyamweru, Celia (1 January 1988). "Activity of Ol Doinyo Lengai volcano, Tanzania, 1983–1987". Journal of African Earth Sciences (and the Middle East). 7 (4): 603–610. Bibcode:1988JAfES...7..603N. doi:10.1016/0899-5362(88)90110-8. ISSN 0899-5362. <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536288901108" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0899536288901108</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>GVP 2023, Photo Gallery. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>Sekisova et al. 2015, p. 1719. - Sekisova, V.S.; Sharygin, V.V.; Zaitsev, A.N.; Strekopytov, S. (1 December 2015). "Liquid immiscibility during crystallization of forsterite–phlogopite ijolites at Oldoinyo Lengai Volcano, Tanzania: study of melt inclusions". Russian Geology and Geophysics. 56 (12): 1717–1737. Bibcode:2015RuGG...56.1717S. doi:10.1016/j.rgg.2015.11.005. ISSN 1068-7971. <a href="https://www.sciencedirect.com/science/article/abs/pii/S1068797115002552" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/S1068797115002552</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>Known as hornitos.[13] <a href="/wiki/Hornito" target="_blank">/wiki/Hornito</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>McFarlane, Lundberg & Belton 2004, p. 98. - McFarlane, D. A.; Lundberg, J.; Belton, F. (2004). "An unusual lava cave from Ol Doinyo lengai, Tanzania". Journal of Cave and Karst Studies. 66 (3): 98–101. <a href="https://scholarship.claremont.edu/wmkeckscience/58/" target="_blank">https://scholarship.claremont.edu/wmkeckscience/58/</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> <li id="fn:15"><p>Kervyn et al. 2010, p. 921. - Kervyn, Matthieu; Ernst, Gerald G. J.; Keller, Jörg; Vaughan, R. Greg; Klaudius, Jurgis; Pradal, Evelyne; Belton, Frederic; Mattsson, Hannes B.; Mbede, Evelyne; Jacobs, Patric (1 October 2010). "Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania". Bulletin of Volcanology. 72 (8): 913–931. doi:10.1007/s00445-010-0360-0. ISSN 1432-0819. S2CID 128562764. <a href="https://link.springer.com/article/10.1007/s00445-010-0360-0" target="_blank">https://link.springer.com/article/10.1007/s00445-010-0360-0</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></p></li> <li id="fn:16"><p>GVP 2023, Photo Gallery. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></p></li> <li id="fn:17"><p>Rey et al. 2021, p. 72. - Rey, Tony; Leone, Frederic; Defossez, Stéphanie; Gherardi, Monique; Parat, Fleurice (7 July 2021). "Volcanic hazards assessment of Oldoinyo Lengai in a data scarcity context (Tanzania)". Territorium (28(II)): 69–81. doi:10.14195/1647-7723_28-2_6. ISSN 1647-7723. S2CID 237769341. <a href="https://impactum-journals.uc.pt/territorium/article/view/9555" target="_blank">https://impactum-journals.uc.pt/territorium/article/view/9555</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></p></li> <li id="fn:18"><p>Mangler et al. 2014, p. 44. - Mangler, Martin F.; Marks, Michael A.W.; Zaitzev, Anatoly N.; Eby, G. Nelson; Markl, Gregor (February 2014). "Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite". Chemical Geology. 365: 43–53. Bibcode:2014ChGeo.365...43M. doi:10.1016/j.chemgeo.2013.11.027. <a href="https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M" target="_blank">https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></p></li> <li id="fn:19"><p>Klaudius & Keller 2006, p. 174. - Klaudius, J; Keller, J (October 2006). "Peralkaline silicate lavas at Oldoinyo Lengai, Tanzania". Lithos. 91 (1–4): 173–190. Bibcode:2006Litho..91..173K. doi:10.1016/j.lithos.2006.03.017. <a href="https://ui.adsabs.harvard.edu/abs/2006Litho..91..173K" target="_blank">https://ui.adsabs.harvard.edu/abs/2006Litho..91..173K</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></p></li> <li id="fn:20"><p>Delcamp et al. 2015, p. 7. - Delcamp, A.; Delvaux, D.; Kwelwa, S.; Macheyeki, A.; Kervyn, M. (30 June 2015). "Sector collapse events at volcanoes in the North Tanzanian divergence zone and their implications for regional tectonics". Geological Society of America Bulletin. 128 (1–2): 169–186. doi:10.1130/B31119.1. ISSN 0016-7606 – via ResearchGate. <a href="https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174" target="_blank">https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></p></li> <li id="fn:21"><p>Delcamp et al. 2015, p. 8. - Delcamp, A.; Delvaux, D.; Kwelwa, S.; Macheyeki, A.; Kervyn, M. (30 June 2015). "Sector collapse events at volcanoes in the North Tanzanian divergence zone and their implications for regional tectonics". Geological Society of America Bulletin. 128 (1–2): 169–186. doi:10.1130/B31119.1. ISSN 0016-7606 – via ResearchGate. <a href="https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174" target="_blank">https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></p></li> <li id="fn:22"><p>Delcamp et al. 2015, p. 17. - Delcamp, A.; Delvaux, D.; Kwelwa, S.; Macheyeki, A.; Kervyn, M. (30 June 2015). "Sector collapse events at volcanoes in the North Tanzanian divergence zone and their implications for regional tectonics". Geological Society of America Bulletin. 128 (1–2): 169–186. doi:10.1130/B31119.1. ISSN 0016-7606 – via ResearchGate. <a href="https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174" target="_blank">https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></p></li> <li id="fn:23"><p>GVP 2023, General Information. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></p></li> <li id="fn:24"><p>Mollel & Swisher 2012, p. 274. - Mollel, Godwin F.; Swisher, Carl C. (August 2012). "The Ngorongoro Volcanic Highland and its relationships to volcanic deposits at Olduvai Gorge and East African Rift volcanism". Journal of Human Evolution. 63 (2): 274–283. Bibcode:2012JHumE..63..274M. doi:10.1016/j.jhevol.2011.09.001. PMID 22404967. <a href="https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M" target="_blank">https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></p></li> <li id="fn:25"><p>Radebaugh, Barnes & Keith 2020, p. 1. - Radebaugh, J.; Barnes, R.; Keith, J. (1 February 2020). The Ol Doinyo Lengai Volcano, Tanzania, as an Analogue for Carbon Planets. Exoplanets in Our Backyard: Solar System and Exoplanet Synergies on Planetary Formation, Evolution, and Habitability. Vol. 2195. p. 3070. Bibcode:2020LPICo2195.3070R. <a href="https://ui.adsabs.harvard.edu/abs/2020LPICo2195.3070R/abstract" target="_blank">https://ui.adsabs.harvard.edu/abs/2020LPICo2195.3070R/abstract</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></p></li> <li id="fn:26"><p>Mollel & Swisher 2012, p. 274. - Mollel, Godwin F.; Swisher, Carl C. (August 2012). "The Ngorongoro Volcanic Highland and its relationships to volcanic deposits at Olduvai Gorge and East African Rift volcanism". Journal of Human Evolution. 63 (2): 274–283. Bibcode:2012JHumE..63..274M. doi:10.1016/j.jhevol.2011.09.001. PMID 22404967. <a href="https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M" target="_blank">https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M</a> <a href="#fnref:26" class="footnote-back-ref">↩</a></p></li> <li id="fn:27"><p>Jones et al. 2019, p. 2517. - Jones, J. Robert; Stamps, D. Sarah; Wauthier, Christelle; Saria, Elifuraha; Biggs, Juliet (May 2019). "Evidence for Slip on a Border Fault Triggered by Magmatic Processes in an Immature Continental Rift". Geochemistry, Geophysics, Geosystems. 20 (5): 2515–2530. Bibcode:2019GGG....20.2515J. doi:10.1029/2018GC008165. ISSN 1525-2027. S2CID 135138771. <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165" target="_blank">https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165</a> <a href="#fnref:27" class="footnote-back-ref">↩</a></p></li> <li id="fn:28"><p>Jones et al. 2019, p. 2522. - Jones, J. Robert; Stamps, D. Sarah; Wauthier, Christelle; Saria, Elifuraha; Biggs, Juliet (May 2019). "Evidence for Slip on a Border Fault Triggered by Magmatic Processes in an Immature Continental Rift". Geochemistry, Geophysics, Geosystems. 20 (5): 2515–2530. Bibcode:2019GGG....20.2515J. doi:10.1029/2018GC008165. ISSN 1525-2027. S2CID 135138771. <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165" target="_blank">https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165</a> <a href="#fnref:28" class="footnote-back-ref">↩</a></p></li> <li id="fn:29"><p>Mollel & Swisher 2012, p. 274. - Mollel, Godwin F.; Swisher, Carl C. (August 2012). "The Ngorongoro Volcanic Highland and its relationships to volcanic deposits at Olduvai Gorge and East African Rift volcanism". Journal of Human Evolution. 63 (2): 274–283. Bibcode:2012JHumE..63..274M. doi:10.1016/j.jhevol.2011.09.001. PMID 22404967. <a href="https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M" target="_blank">https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M</a> <a href="#fnref:29" class="footnote-back-ref">↩</a></p></li> <li id="fn:30"><p>Mollel & Swisher 2012, p. 276. - Mollel, Godwin F.; Swisher, Carl C. (August 2012). "The Ngorongoro Volcanic Highland and its relationships to volcanic deposits at Olduvai Gorge and East African Rift volcanism". Journal of Human Evolution. 63 (2): 274–283. Bibcode:2012JHumE..63..274M. doi:10.1016/j.jhevol.2011.09.001. PMID 22404967. <a href="https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M" target="_blank">https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M</a> <a href="#fnref:30" class="footnote-back-ref">↩</a></p></li> <li id="fn:31"><p>The Naibor Soito monogenetic volcanic field lies between Gelai and Ol Doinyo Lengai.[25] <a href="/wiki/Monogenetic_volcanic_field" target="_blank">/wiki/Monogenetic_volcanic_field</a> <a href="#fnref:31" class="footnote-back-ref">↩</a></p></li> <li id="fn:32"><p>Nyamweru 1988, p. 603. - Nyamweru, Celia (1 January 1988). "Activity of Ol Doinyo Lengai volcano, Tanzania, 1983–1987". Journal of African Earth Sciences (and the Middle East). 7 (4): 603–610. Bibcode:1988JAfES...7..603N. doi:10.1016/0899-5362(88)90110-8. ISSN 0899-5362. <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536288901108" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0899536288901108</a> <a href="#fnref:32" class="footnote-back-ref">↩</a></p></li> <li id="fn:33"><p>Together they make up more than 90% of the cone.[13] <a href="#fnref:33" class="footnote-back-ref">↩</a></p></li> <li id="fn:34"><p>Oppenheimer 1998, p. 55. - Oppenheimer, C. (January 1998). "Satellite observation of active carbonatite volcanism at Ol Doinyo Lengai, Tanzania". International Journal of Remote Sensing. 19 (1): 55–64. Bibcode:1998IJRS...19...55O. doi:10.1080/014311698216422. <a href="https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O" target="_blank">https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O</a> <a href="#fnref:34" class="footnote-back-ref">↩</a></p></li> <li id="fn:35"><p>Carbonatites are magmas that consist of carbonate compounds.[10] At Ol Doinyo Lengai, they are made up of nyerereite (Na2Ca(CO3)2) and gregoryite ((Na,K,Ca)2CO3).[5] <a href="/wiki/Magma" target="_blank">/wiki/Magma</a> <a href="#fnref:35" class="footnote-back-ref">↩</a></p></li> <li id="fn:36"><p>GVP 2023, General Information. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:36" class="footnote-back-ref">↩</a></p></li> <li id="fn:37"><p>Mangler et al. 2014, p. 44. - Mangler, Martin F.; Marks, Michael A.W.; Zaitzev, Anatoly N.; Eby, G. Nelson; Markl, Gregor (February 2014). "Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite". Chemical Geology. 365: 43–53. Bibcode:2014ChGeo.365...43M. doi:10.1016/j.chemgeo.2013.11.027. <a href="https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M" target="_blank">https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M</a> <a href="#fnref:37" class="footnote-back-ref">↩</a></p></li> <li id="fn:38"><p>Silicic lavas mostly issued from the southern crater.[13] <a href="#fnref:38" class="footnote-back-ref">↩</a></p></li> <li id="fn:39"><p>Klaudius & Keller 2006, p. 173. - Klaudius, J; Keller, J (October 2006). "Peralkaline silicate lavas at Oldoinyo Lengai, Tanzania". Lithos. 91 (1–4): 173–190. Bibcode:2006Litho..91..173K. doi:10.1016/j.lithos.2006.03.017. <a href="https://ui.adsabs.harvard.edu/abs/2006Litho..91..173K" target="_blank">https://ui.adsabs.harvard.edu/abs/2006Litho..91..173K</a> <a href="#fnref:39" class="footnote-back-ref">↩</a></p></li> <li id="fn:40"><p>Gilbert & Williams-Jones 2008, p. 520. - Gilbert, C.D.; Williams-Jones, A.E. (October 2008). "Vapour transport of rare earth elements (REE) in volcanic gas: Evidence from encrustations at Oldoinyo Lengai". Journal of Volcanology and Geothermal Research. 176 (4): 519–528. Bibcode:2008JVGR..176..519G. doi:10.1016/j.jvolgeores.2008.05.003. <a href="https://ui.adsabs.harvard.edu/abs/2008JVGR..176..519G" target="_blank">https://ui.adsabs.harvard.edu/abs/2008JVGR..176..519G</a> <a href="#fnref:40" class="footnote-back-ref">↩</a></p></li> <li id="fn:41"><p>Radebaugh, Barnes & Keith 2020, p. 1. - Radebaugh, J.; Barnes, R.; Keith, J. (1 February 2020). The Ol Doinyo Lengai Volcano, Tanzania, as an Analogue for Carbon Planets. Exoplanets in Our Backyard: Solar System and Exoplanet Synergies on Planetary Formation, Evolution, and Habitability. Vol. 2195. p. 3070. Bibcode:2020LPICo2195.3070R. <a href="https://ui.adsabs.harvard.edu/abs/2020LPICo2195.3070R/abstract" target="_blank">https://ui.adsabs.harvard.edu/abs/2020LPICo2195.3070R/abstract</a> <a href="#fnref:41" class="footnote-back-ref">↩</a></p></li> <li id="fn:42"><p>Mangler et al. 2014, p. 44. - Mangler, Martin F.; Marks, Michael A.W.; Zaitzev, Anatoly N.; Eby, G. Nelson; Markl, Gregor (February 2014). "Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite". Chemical Geology. 365: 43–53. Bibcode:2014ChGeo.365...43M. doi:10.1016/j.chemgeo.2013.11.027. <a href="https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M" target="_blank">https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M</a> <a href="#fnref:42" class="footnote-back-ref">↩</a></p></li> <li id="fn:43"><p>Oppenheimer 1998, p. 60. - Oppenheimer, C. (January 1998). "Satellite observation of active carbonatite volcanism at Ol Doinyo Lengai, Tanzania". International Journal of Remote Sensing. 19 (1): 55–64. Bibcode:1998IJRS...19...55O. doi:10.1080/014311698216422. <a href="https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O" target="_blank">https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O</a> <a href="#fnref:43" class="footnote-back-ref">↩</a></p></li> <li id="fn:44"><p>Morogan & Martin 1985, p. 1114. - Morogan, Viorica; Martin, Robert F. (1985). "Mineralogy and partial melting of fenitized crustal xenoliths in the Oldoinyo Lengai carbonatitic volcano, Tanzania". American Mineralogist. 70 (11–12): 1114–1126. <a href="https://pubs.geoscienceworld.org/msa/ammin/article-abstract/70/11-12/1114/41675/Mineralogy-and-partial-melting-of-fenitized" target="_blank">https://pubs.geoscienceworld.org/msa/ammin/article-abstract/70/11-12/1114/41675/Mineralogy-and-partial-melting-of-fenitized</a> <a href="#fnref:44" class="footnote-back-ref">↩</a></p></li> <li id="fn:45"><p>Sekisova et al. 2015, p. 1719. - Sekisova, V.S.; Sharygin, V.V.; Zaitsev, A.N.; Strekopytov, S. (1 December 2015). "Liquid immiscibility during crystallization of forsterite–phlogopite ijolites at Oldoinyo Lengai Volcano, Tanzania: study of melt inclusions". Russian Geology and Geophysics. 56 (12): 1717–1737. Bibcode:2015RuGG...56.1717S. doi:10.1016/j.rgg.2015.11.005. ISSN 1068-7971. <a href="https://www.sciencedirect.com/science/article/abs/pii/S1068797115002552" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/S1068797115002552</a> <a href="#fnref:45" class="footnote-back-ref">↩</a></p></li> <li id="fn:46"><p>Robertson et al. 2014. - Robertson, C. H.; Harpp, K. S.; Geist, D.; Bosselait, M. (1 December 2014). Preferential Weathering of Carbonatite Lava at Ol Doinyo Lengai, Tanzania. American Geophysical Union, Fall Meeting 2014. Vol. 2014. pp. V51C–4765. Bibcode:2014AGUFM.V51C4765R. <a href="https://ui.adsabs.harvard.edu/abs/2014AGUFM.V51C4765R/abstract" target="_blank">https://ui.adsabs.harvard.edu/abs/2014AGUFM.V51C4765R/abstract</a> <a href="#fnref:46" class="footnote-back-ref">↩</a></p></li> <li id="fn:47"><p>Gilbert & Williams-Jones 2008, p. 524. - Gilbert, C.D.; Williams-Jones, A.E. (October 2008). "Vapour transport of rare earth elements (REE) in volcanic gas: Evidence from encrustations at Oldoinyo Lengai". Journal of Volcanology and Geothermal Research. 176 (4): 519–528. Bibcode:2008JVGR..176..519G. doi:10.1016/j.jvolgeores.2008.05.003. <a href="https://ui.adsabs.harvard.edu/abs/2008JVGR..176..519G" target="_blank">https://ui.adsabs.harvard.edu/abs/2008JVGR..176..519G</a> <a href="#fnref:47" class="footnote-back-ref">↩</a></p></li> <li id="fn:48"><p>Zaitsev, Keller & Billström 2009, p. 302. - Zaitsev, A. N.; Keller, J.; Billström, K. (1 March 2009). "Isotopic composition of Sr, Nd, and Pb in pirssonite, shortite and calcite carbonatites from Oldoinyo Lengai volcano, Tanzania". Doklady Earth Sciences. 425 (1): 302–306. Bibcode:2009DokES.425..302Z. doi:10.1134/S1028334X09020287. ISSN 1531-8354. S2CID 129339452. <a href="https://link.springer.com/article/10.1134/S1028334X09020287" target="_blank">https://link.springer.com/article/10.1134/S1028334X09020287</a> <a href="#fnref:48" class="footnote-back-ref">↩</a></p></li> <li id="fn:49"><p>The volcanic rocks contain up to several percent chlorine and fluorine by weight.[33] <a href="/wiki/Chlorine" target="_blank">/wiki/Chlorine</a> <a href="#fnref:49" class="footnote-back-ref">↩</a></p></li> <li id="fn:50"><p>McFarlane, Lundberg & Belton 2004, p. 98. - McFarlane, D. A.; Lundberg, J.; Belton, F. (2004). "An unusual lava cave from Ol Doinyo lengai, Tanzania". Journal of Cave and Karst Studies. 66 (3): 98–101. <a href="https://scholarship.claremont.edu/wmkeckscience/58/" target="_blank">https://scholarship.claremont.edu/wmkeckscience/58/</a> <a href="#fnref:50" class="footnote-back-ref">↩</a></p></li> <li id="fn:51"><p>Gilbert & Williams-Jones 2008, p. 520. - Gilbert, C.D.; Williams-Jones, A.E. (October 2008). "Vapour transport of rare earth elements (REE) in volcanic gas: Evidence from encrustations at Oldoinyo Lengai". Journal of Volcanology and Geothermal Research. 176 (4): 519–528. Bibcode:2008JVGR..176..519G. doi:10.1016/j.jvolgeores.2008.05.003. <a href="https://ui.adsabs.harvard.edu/abs/2008JVGR..176..519G" target="_blank">https://ui.adsabs.harvard.edu/abs/2008JVGR..176..519G</a> <a href="#fnref:51" class="footnote-back-ref">↩</a></p></li> <li id="fn:52"><p>Hay 1989, p. 80. - Hay, Richard L. (1 March 1989). "Holocene carbonatite-nephelinite tephra deposits of Oldoinyo Lengai, Tanzania". Journal of Volcanology and Geothermal Research. 37 (1): 77–91. Bibcode:1989JVGR...37...77H. doi:10.1016/0377-0273(89)90114-5. ISSN 0377-0273. <a href="https://www.sciencedirect.com/science/article/abs/pii/0377027389901145" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0377027389901145</a> <a href="#fnref:52" class="footnote-back-ref">↩</a></p></li> <li id="fn:53"><p>Jones et al. 2019, p. 2518. - Jones, J. Robert; Stamps, D. Sarah; Wauthier, Christelle; Saria, Elifuraha; Biggs, Juliet (May 2019). "Evidence for Slip on a Border Fault Triggered by Magmatic Processes in an Immature Continental Rift". Geochemistry, Geophysics, Geosystems. 20 (5): 2515–2530. Bibcode:2019GGG....20.2515J. doi:10.1029/2018GC008165. ISSN 1525-2027. S2CID 135138771. <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165" target="_blank">https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165</a> <a href="#fnref:53" class="footnote-back-ref">↩</a></p></li> <li id="fn:54"><p>Radebaugh, Barnes & Keith 2020, p. 1. - Radebaugh, J.; Barnes, R.; Keith, J. (1 February 2020). The Ol Doinyo Lengai Volcano, Tanzania, as an Analogue for Carbon Planets. Exoplanets in Our Backyard: Solar System and Exoplanet Synergies on Planetary Formation, Evolution, and Habitability. Vol. 2195. p. 3070. Bibcode:2020LPICo2195.3070R. <a href="https://ui.adsabs.harvard.edu/abs/2020LPICo2195.3070R/abstract" target="_blank">https://ui.adsabs.harvard.edu/abs/2020LPICo2195.3070R/abstract</a> <a href="#fnref:54" class="footnote-back-ref">↩</a></p></li> <li id="fn:55"><p>Mangler et al. 2014, p. 48. - Mangler, Martin F.; Marks, Michael A.W.; Zaitzev, Anatoly N.; Eby, G. Nelson; Markl, Gregor (February 2014). "Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite". Chemical Geology. 365: 43–53. Bibcode:2014ChGeo.365...43M. doi:10.1016/j.chemgeo.2013.11.027. <a href="https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M" target="_blank">https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M</a> <a href="#fnref:55" class="footnote-back-ref">↩</a></p></li> <li id="fn:56"><p>Daud Masungulwa et al. 2021. - Daud Masungulwa, Ntambila Simon; Stamps, D. Sarah; Battaglia, Maurizio; Huang, Mong-Han; Saria, Elifuraha; Ji, Kang Hyeun; Popolizio, Kelsey (1 December 2021). Elucidating the Magma Plumbing System of the Active Volcano Ol Doinyo Lengai, Natron Rift, Tanzania Using Geodesy and Numerical Modeling. AGU Fall Meeting 2021. Vol. 2021. pp. G24B–05. Bibcode:2021AGUFM.G24B..05D. <a href="https://ui.adsabs.harvard.edu/abs/2021AGUFM.G24B..05D/abstract" target="_blank">https://ui.adsabs.harvard.edu/abs/2021AGUFM.G24B..05D/abstract</a> <a href="#fnref:56" class="footnote-back-ref">↩</a></p></li> <li id="fn:57"><p>Biggs et al. 2021, p. 3. - Biggs, Juliet; Ayele, Atalay; Fischer, Tobias P.; Fontijn, Karen; Hutchison, William; Kazimoto, Emmanuel; Whaler, Kathy; Wright, Tim J. (25 November 2021). "Volcanic activity and hazard in the East African Rift Zone". Nature Communications. 12 (1): 6881. Bibcode:2021NatCo..12.6881B. doi:10.1038/s41467-021-27166-y. ISSN 2041-1723. PMC 8616933. PMID 34824232. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8616933" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8616933</a> <a href="#fnref:57" class="footnote-back-ref">↩</a></p></li> <li id="fn:58"><p>Fischer et al. 2006. - Fischer, T.; Burnard, P.; Marty, B.; Palhol, F.; Mangasini, F.; Shaw, A. M. (1 December 2006). The 2005 and 2006 eruptions of Ol Doinyo Lengai: assessing deep and shallow processes at an active carbonatite volcano using volatile chemistry and fluxes. American Geophysical Union, Fall Meeting 2006. Vol. 2006. pp. V14B–04. Bibcode:2006AGUFM.V14B..04F. <a href="https://ui.adsabs.harvard.edu/abs/2006AGUFM.V14B..04F/abstract" target="_blank">https://ui.adsabs.harvard.edu/abs/2006AGUFM.V14B..04F/abstract</a> <a href="#fnref:58" class="footnote-back-ref">↩</a></p></li> <li id="fn:59"><p>Oppenheimer 1998, p. 55. - Oppenheimer, C. (January 1998). "Satellite observation of active carbonatite volcanism at Ol Doinyo Lengai, Tanzania". International Journal of Remote Sensing. 19 (1): 55–64. Bibcode:1998IJRS...19...55O. doi:10.1080/014311698216422. <a href="https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O" target="_blank">https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O</a> <a href="#fnref:59" class="footnote-back-ref">↩</a></p></li> <li id="fn:60"><p>Mangler et al. 2014, p. 44. - Mangler, Martin F.; Marks, Michael A.W.; Zaitzev, Anatoly N.; Eby, G. Nelson; Markl, Gregor (February 2014). "Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite". Chemical Geology. 365: 43–53. Bibcode:2014ChGeo.365...43M. doi:10.1016/j.chemgeo.2013.11.027. <a href="https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M" target="_blank">https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M</a> <a href="#fnref:60" class="footnote-back-ref">↩</a></p></li> <li id="fn:61"><p>Mollel & Swisher 2012, p. 278. - Mollel, Godwin F.; Swisher, Carl C. (August 2012). "The Ngorongoro Volcanic Highland and its relationships to volcanic deposits at Olduvai Gorge and East African Rift volcanism". Journal of Human Evolution. 63 (2): 274–283. Bibcode:2012JHumE..63..274M. doi:10.1016/j.jhevol.2011.09.001. PMID 22404967. <a href="https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M" target="_blank">https://ui.adsabs.harvard.edu/abs/2012JHumE..63..274M</a> <a href="#fnref:61" class="footnote-back-ref">↩</a></p></li> <li id="fn:62"><p>Mangler et al. 2014, p. 44. - Mangler, Martin F.; Marks, Michael A.W.; Zaitzev, Anatoly N.; Eby, G. Nelson; Markl, Gregor (February 2014). "Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation, silicate–natrocarbonatite melt separation and surface alteration of natrocarbonatite". Chemical Geology. 365: 43–53. Bibcode:2014ChGeo.365...43M. doi:10.1016/j.chemgeo.2013.11.027. <a href="https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M" target="_blank">https://ui.adsabs.harvard.edu/abs/2014ChGeo.365...43M</a> <a href="#fnref:62" class="footnote-back-ref">↩</a></p></li> <li id="fn:63"><p>Klaudius & Keller 2006, p. 176. - Klaudius, J; Keller, J (October 2006). "Peralkaline silicate lavas at Oldoinyo Lengai, Tanzania". Lithos. 91 (1–4): 173–190. Bibcode:2006Litho..91..173K. doi:10.1016/j.lithos.2006.03.017. <a href="https://ui.adsabs.harvard.edu/abs/2006Litho..91..173K" target="_blank">https://ui.adsabs.harvard.edu/abs/2006Litho..91..173K</a> <a href="#fnref:63" class="footnote-back-ref">↩</a></p></li> <li id="fn:64"><p>Sekisova et al. 2015, p. 1719. - Sekisova, V.S.; Sharygin, V.V.; Zaitsev, A.N.; Strekopytov, S. (1 December 2015). "Liquid immiscibility during crystallization of forsterite–phlogopite ijolites at Oldoinyo Lengai Volcano, Tanzania: study of melt inclusions". Russian Geology and Geophysics. 56 (12): 1717–1737. Bibcode:2015RuGG...56.1717S. doi:10.1016/j.rgg.2015.11.005. ISSN 1068-7971. <a href="https://www.sciencedirect.com/science/article/abs/pii/S1068797115002552" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/S1068797115002552</a> <a href="#fnref:64" class="footnote-back-ref">↩</a></p></li> <li id="fn:65"><p>GVP 2023, General Information. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:65" class="footnote-back-ref">↩</a></p></li> <li id="fn:66"><p>Hay 1989, p. 78. - Hay, Richard L. (1 March 1989). "Holocene carbonatite-nephelinite tephra deposits of Oldoinyo Lengai, Tanzania". Journal of Volcanology and Geothermal Research. 37 (1): 77–91. Bibcode:1989JVGR...37...77H. doi:10.1016/0377-0273(89)90114-5. ISSN 0377-0273. <a href="https://www.sciencedirect.com/science/article/abs/pii/0377027389901145" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0377027389901145</a> <a href="#fnref:66" class="footnote-back-ref">↩</a></p></li> <li id="fn:67"><p>Delcamp et al. 2015, p. 7. - Delcamp, A.; Delvaux, D.; Kwelwa, S.; Macheyeki, A.; Kervyn, M. (30 June 2015). "Sector collapse events at volcanoes in the North Tanzanian divergence zone and their implications for regional tectonics". Geological Society of America Bulletin. 128 (1–2): 169–186. doi:10.1130/B31119.1. ISSN 0016-7606 – via ResearchGate. <a href="https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174" target="_blank">https://pubs.geoscienceworld.org/gsabulletin/article/128/1-2/169-186/126174</a> <a href="#fnref:67" class="footnote-back-ref">↩</a></p></li> <li id="fn:68"><p>Fischer et al. 2006. - Fischer, T.; Burnard, P.; Marty, B.; Palhol, F.; Mangasini, F.; Shaw, A. M. (1 December 2006). The 2005 and 2006 eruptions of Ol Doinyo Lengai: assessing deep and shallow processes at an active carbonatite volcano using volatile chemistry and fluxes. American Geophysical Union, Fall Meeting 2006. Vol. 2006. pp. V14B–04. Bibcode:2006AGUFM.V14B..04F. <a href="https://ui.adsabs.harvard.edu/abs/2006AGUFM.V14B..04F/abstract" target="_blank">https://ui.adsabs.harvard.edu/abs/2006AGUFM.V14B..04F/abstract</a> <a href="#fnref:68" class="footnote-back-ref">↩</a></p></li> <li id="fn:69"><p>Makongoro et al. 2022, p. 209. - Makongoro, Mohamed Zengo; Vegi, Maheswara Rao; Vuai, Said Ali Hamad; Msabi, Michael Mwita (1 December 2022). "Radiometric dating of the Ootun palaeosol and its implication for the age of the Shifting Sand in Ngorongoro Lengai Geopark (Arusha, Tanzania)". Geologos (in Spanish). 28 (3): 203–215. Bibcode:2022Geolg..28..203M. doi:10.14746/logos.2022.28.3.0003. S2CID 256941631. <a href="https://doi.org/10.14746%2Flogos.2022.28.3.0003" target="_blank">https://doi.org/10.14746%2Flogos.2022.28.3.0003</a> <a href="#fnref:69" class="footnote-back-ref">↩</a></p></li> <li id="fn:70"><p>Hay 1989, p. 80. - Hay, Richard L. (1 March 1989). "Holocene carbonatite-nephelinite tephra deposits of Oldoinyo Lengai, Tanzania". Journal of Volcanology and Geothermal Research. 37 (1): 77–91. Bibcode:1989JVGR...37...77H. doi:10.1016/0377-0273(89)90114-5. ISSN 0377-0273. <a href="https://www.sciencedirect.com/science/article/abs/pii/0377027389901145" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0377027389901145</a> <a href="#fnref:70" class="footnote-back-ref">↩</a></p></li> <li id="fn:71"><p>Hay 1989, p. 80. - Hay, Richard L. (1 March 1989). "Holocene carbonatite-nephelinite tephra deposits of Oldoinyo Lengai, Tanzania". Journal of Volcanology and Geothermal Research. 37 (1): 77–91. Bibcode:1989JVGR...37...77H. doi:10.1016/0377-0273(89)90114-5. ISSN 0377-0273. <a href="https://www.sciencedirect.com/science/article/abs/pii/0377027389901145" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0377027389901145</a> <a href="#fnref:71" class="footnote-back-ref">↩</a></p></li> <li id="fn:72"><p>Nyamweru 1988, p. 603. - Nyamweru, Celia (1 January 1988). "Activity of Ol Doinyo Lengai volcano, Tanzania, 1983–1987". Journal of African Earth Sciences (and the Middle East). 7 (4): 603–610. Bibcode:1988JAfES...7..603N. doi:10.1016/0899-5362(88)90110-8. ISSN 0899-5362. <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536288901108" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0899536288901108</a> <a href="#fnref:72" class="footnote-back-ref">↩</a></p></li> <li id="fn:73"><p>Meshili & Kwon 2020, p. 401. - Meshili, Valerie Ayubu; Kwon, Jay Hyoun (2020). "Crustal Movement at Ol Doinyo Lengai based on GPS Measurements". Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography. 38 (5): 401–406. doi:10.7848/ksgpc.2020.38.5.401. ISSN 1598-4850. <a href="https://koreascience.kr/article/JAKO202031837625706.page" target="_blank">https://koreascience.kr/article/JAKO202031837625706.page</a> <a href="#fnref:73" class="footnote-back-ref">↩</a></p></li> <li id="fn:74"><p>Eruptions have been recorded in 1880, 1894 (?), 1904, 1913-15, 1917, 1921, 1926, 1940-41, 1954-55, 1958, and 1960.[45] <a href="#fnref:74" class="footnote-back-ref">↩</a></p></li> <li id="fn:75"><p>Nyamweru 1990, p. 389. - Nyamweru, C (1 January 1990). "Observations on changes in the active crater of Ol Doinyo Lengai from 1960 to 1988". Journal of African Earth Sciences (and the Middle East). 11 (3): 385–390. Bibcode:1990JAfES..11..385N. doi:10.1016/0899-5362(90)90017-9. ISSN 0899-5362. <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536290900179" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0899536290900179</a> <a href="#fnref:75" class="footnote-back-ref">↩</a></p></li> <li id="fn:76"><p>GVP 2023, Photo Gallery. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:76" class="footnote-back-ref">↩</a></p></li> <li id="fn:77"><p>Nyamweru 1988, p. 603. - Nyamweru, Celia (1 January 1988). "Activity of Ol Doinyo Lengai volcano, Tanzania, 1983–1987". Journal of African Earth Sciences (and the Middle East). 7 (4): 603–610. Bibcode:1988JAfES...7..603N. doi:10.1016/0899-5362(88)90110-8. ISSN 0899-5362. <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536288901108" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0899536288901108</a> <a href="#fnref:77" class="footnote-back-ref">↩</a></p></li> <li id="fn:78"><p>GVP 2023, General Information. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:78" class="footnote-back-ref">↩</a></p></li> <li id="fn:79"><p>Muthama, Mathu & Kamau 2012, p. 8. - Muthama, N. J.; Mathu, E.M.; Kamau, G. N. (December 2012). "An investigation of the transport and dispersion of atmospheric pollutants over east Africa during the Ol doinyo lengai volcanic eruption in July 2007 and march 2008". International Journal of BioChemiPhysics. 20: 7–16. Retrieved 14 March 2023. <a href="http://erepository.uonbi.ac.ke/handle/11295/36396" target="_blank">http://erepository.uonbi.ac.ke/handle/11295/36396</a> <a href="#fnref:79" class="footnote-back-ref">↩</a></p></li> <li id="fn:80"><p>1966 saw explosive eruptions in August and October, which formed a deep crater.[11] <a href="/wiki/Explosive_eruption" target="_blank">/wiki/Explosive_eruption</a> <a href="#fnref:80" class="footnote-back-ref">↩</a></p></li> <li id="fn:81"><p>Fischer et al. 2006. - Fischer, T.; Burnard, P.; Marty, B.; Palhol, F.; Mangasini, F.; Shaw, A. M. (1 December 2006). The 2005 and 2006 eruptions of Ol Doinyo Lengai: assessing deep and shallow processes at an active carbonatite volcano using volatile chemistry and fluxes. American Geophysical Union, Fall Meeting 2006. Vol. 2006. pp. V14B–04. Bibcode:2006AGUFM.V14B..04F. <a href="https://ui.adsabs.harvard.edu/abs/2006AGUFM.V14B..04F/abstract" target="_blank">https://ui.adsabs.harvard.edu/abs/2006AGUFM.V14B..04F/abstract</a> <a href="#fnref:81" class="footnote-back-ref">↩</a></p></li> <li id="fn:82"><p>Kervyn et al. 2010, p. 926. - Kervyn, Matthieu; Ernst, Gerald G. J.; Keller, Jörg; Vaughan, R. Greg; Klaudius, Jurgis; Pradal, Evelyne; Belton, Frederic; Mattsson, Hannes B.; Mbede, Evelyne; Jacobs, Patric (1 October 2010). "Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania". Bulletin of Volcanology. 72 (8): 913–931. doi:10.1007/s00445-010-0360-0. ISSN 1432-0819. S2CID 128562764. <a href="https://link.springer.com/article/10.1007/s00445-010-0360-0" target="_blank">https://link.springer.com/article/10.1007/s00445-010-0360-0</a> <a href="#fnref:82" class="footnote-back-ref">↩</a></p></li> <li id="fn:83"><p>GVP 2023, Photo Gallery. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:83" class="footnote-back-ref">↩</a></p></li> <li id="fn:84"><p>Nyamweru 1990, p. 387. - Nyamweru, C (1 January 1990). "Observations on changes in the active crater of Ol Doinyo Lengai from 1960 to 1988". Journal of African Earth Sciences (and the Middle East). 11 (3): 385–390. Bibcode:1990JAfES..11..385N. doi:10.1016/0899-5362(90)90017-9. ISSN 0899-5362. <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536290900179" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0899536290900179</a> <a href="#fnref:84" class="footnote-back-ref">↩</a></p></li> <li id="fn:85"><p>Nyamweru 1988, p. 604. - Nyamweru, Celia (1 January 1988). "Activity of Ol Doinyo Lengai volcano, Tanzania, 1983–1987". Journal of African Earth Sciences (and the Middle East). 7 (4): 603–610. Bibcode:1988JAfES...7..603N. doi:10.1016/0899-5362(88)90110-8. ISSN 0899-5362. <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536288901108" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0899536288901108</a> <a href="#fnref:85" class="footnote-back-ref">↩</a></p></li> <li id="fn:86"><p>Jones et al. 2019, p. 2517. - Jones, J. Robert; Stamps, D. Sarah; Wauthier, Christelle; Saria, Elifuraha; Biggs, Juliet (May 2019). "Evidence for Slip on a Border Fault Triggered by Magmatic Processes in an Immature Continental Rift". Geochemistry, Geophysics, Geosystems. 20 (5): 2515–2530. Bibcode:2019GGG....20.2515J. doi:10.1029/2018GC008165. ISSN 1525-2027. S2CID 135138771. <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165" target="_blank">https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165</a> <a href="#fnref:86" class="footnote-back-ref">↩</a></p></li> <li id="fn:87"><p>GVP 2023, Deformation history. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:87" class="footnote-back-ref">↩</a></p></li> <li id="fn:88"><p>Jones et al. 2019, p. 2525. - Jones, J. Robert; Stamps, D. Sarah; Wauthier, Christelle; Saria, Elifuraha; Biggs, Juliet (May 2019). "Evidence for Slip on a Border Fault Triggered by Magmatic Processes in an Immature Continental Rift". Geochemistry, Geophysics, Geosystems. 20 (5): 2515–2530. Bibcode:2019GGG....20.2515J. doi:10.1029/2018GC008165. ISSN 1525-2027. S2CID 135138771. <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165" target="_blank">https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GC008165</a> <a href="#fnref:88" class="footnote-back-ref">↩</a></p></li> <li id="fn:89"><p>Oppenheimer 1998, p. 55. - Oppenheimer, C. (January 1998). "Satellite observation of active carbonatite volcanism at Ol Doinyo Lengai, Tanzania". International Journal of Remote Sensing. 19 (1): 55–64. Bibcode:1998IJRS...19...55O. doi:10.1080/014311698216422. <a href="https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O" target="_blank">https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O</a> <a href="#fnref:89" class="footnote-back-ref">↩</a></p></li> <li id="fn:90"><p>GVP 2023, Photo Gallery. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:90" class="footnote-back-ref">↩</a></p></li> <li id="fn:91"><p>GVP 2023, Eruption history. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:91" class="footnote-back-ref">↩</a></p></li> <li id="fn:92"><p>Oppenheimer 1998, p. 55. - Oppenheimer, C. (January 1998). "Satellite observation of active carbonatite volcanism at Ol Doinyo Lengai, Tanzania". International Journal of Remote Sensing. 19 (1): 55–64. Bibcode:1998IJRS...19...55O. doi:10.1080/014311698216422. <a href="https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O" target="_blank">https://ui.adsabs.harvard.edu/abs/1998IJRS...19...55O</a> <a href="#fnref:92" class="footnote-back-ref">↩</a></p></li> <li id="fn:93"><p>Kervyn et al. 2010, p. 915. - Kervyn, Matthieu; Ernst, Gerald G. J.; Keller, Jörg; Vaughan, R. Greg; Klaudius, Jurgis; Pradal, Evelyne; Belton, Frederic; Mattsson, Hannes B.; Mbede, Evelyne; Jacobs, Patric (1 October 2010). "Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania". Bulletin of Volcanology. 72 (8): 913–931. doi:10.1007/s00445-010-0360-0. ISSN 1432-0819. S2CID 128562764. <a href="https://link.springer.com/article/10.1007/s00445-010-0360-0" target="_blank">https://link.springer.com/article/10.1007/s00445-010-0360-0</a> <a href="#fnref:93" class="footnote-back-ref">↩</a></p></li> <li id="fn:94"><p>Kervyn et al. 2010, p. 914. - Kervyn, Matthieu; Ernst, Gerald G. J.; Keller, Jörg; Vaughan, R. Greg; Klaudius, Jurgis; Pradal, Evelyne; Belton, Frederic; Mattsson, Hannes B.; Mbede, Evelyne; Jacobs, Patric (1 October 2010). "Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania". Bulletin of Volcanology. 72 (8): 913–931. doi:10.1007/s00445-010-0360-0. ISSN 1432-0819. S2CID 128562764. <a href="https://link.springer.com/article/10.1007/s00445-010-0360-0" target="_blank">https://link.springer.com/article/10.1007/s00445-010-0360-0</a> <a href="#fnref:94" class="footnote-back-ref">↩</a></p></li> <li id="fn:95"><p>Laxton 2020, p. 438. - Laxton, Kate (September 2020). "Collection of lava samples from Ol Doinyo Lengai". Nature Reviews Earth & Environment. 1 (9): 438. Bibcode:2020NRvEE...1..438L. doi:10.1038/s43017-020-0089-z. ISSN 2662-138X. S2CID 220856786. <a href="https://www.nature.com/articles/s43017-020-0089-z" target="_blank">https://www.nature.com/articles/s43017-020-0089-z</a> <a href="#fnref:95" class="footnote-back-ref">↩</a></p></li> <li id="fn:96"><p>Kervyn et al. 2010, p. 914. - Kervyn, Matthieu; Ernst, Gerald G. J.; Keller, Jörg; Vaughan, R. Greg; Klaudius, Jurgis; Pradal, Evelyne; Belton, Frederic; Mattsson, Hannes B.; Mbede, Evelyne; Jacobs, Patric (1 October 2010). "Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania". Bulletin of Volcanology. 72 (8): 913–931. doi:10.1007/s00445-010-0360-0. ISSN 1432-0819. S2CID 128562764. <a href="https://link.springer.com/article/10.1007/s00445-010-0360-0" target="_blank">https://link.springer.com/article/10.1007/s00445-010-0360-0</a> <a href="#fnref:96" class="footnote-back-ref">↩</a></p></li> <li id="fn:97"><p>Kervyn et al. 2010, p. 924. - Kervyn, Matthieu; Ernst, Gerald G. J.; Keller, Jörg; Vaughan, R. Greg; Klaudius, Jurgis; Pradal, Evelyne; Belton, Frederic; Mattsson, Hannes B.; Mbede, Evelyne; Jacobs, Patric (1 October 2010). "Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania". Bulletin of Volcanology. 72 (8): 913–931. doi:10.1007/s00445-010-0360-0. ISSN 1432-0819. S2CID 128562764. <a href="https://link.springer.com/article/10.1007/s00445-010-0360-0" target="_blank">https://link.springer.com/article/10.1007/s00445-010-0360-0</a> <a href="#fnref:97" class="footnote-back-ref">↩</a></p></li> <li id="fn:98"><p>Muthama, Mathu & Kamau 2012, p. 9. - Muthama, N. J.; Mathu, E.M.; Kamau, G. N. (December 2012). "An investigation of the transport and dispersion of atmospheric pollutants over east Africa during the Ol doinyo lengai volcanic eruption in July 2007 and march 2008". International Journal of BioChemiPhysics. 20: 7–16. Retrieved 14 March 2023. <a href="http://erepository.uonbi.ac.ke/handle/11295/36396" target="_blank">http://erepository.uonbi.ac.ke/handle/11295/36396</a> <a href="#fnref:98" class="footnote-back-ref">↩</a></p></li> <li id="fn:99"><p>Muthama, Mathu & Kamau 2012, p. 15. - Muthama, N. J.; Mathu, E.M.; Kamau, G. N. (December 2012). "An investigation of the transport and dispersion of atmospheric pollutants over east Africa during the Ol doinyo lengai volcanic eruption in July 2007 and march 2008". International Journal of BioChemiPhysics. 20: 7–16. Retrieved 14 March 2023. <a href="http://erepository.uonbi.ac.ke/handle/11295/36396" target="_blank">http://erepository.uonbi.ac.ke/handle/11295/36396</a> <a href="#fnref:99" class="footnote-back-ref">↩</a></p></li> <li id="fn:100"><p>Vye-Brown et al. 2014, p. 4. - Vye-Brown, C.; Crummy, J.; Smith, K.; Mruma, A.; Kabelwa, H. (2014). "Volcanic hazards in Tanzania". <a href="https://nora.nerc.ac.uk/id/eprint/506873/" target="_blank">https://nora.nerc.ac.uk/id/eprint/506873/</a> <a href="#fnref:100" class="footnote-back-ref">↩</a></p></li> <li id="fn:101"><p>Vye-Brown et al. 2014, p. 25. - Vye-Brown, C.; Crummy, J.; Smith, K.; Mruma, A.; Kabelwa, H. (2014). "Volcanic hazards in Tanzania". <a href="https://nora.nerc.ac.uk/id/eprint/506873/" target="_blank">https://nora.nerc.ac.uk/id/eprint/506873/</a> <a href="#fnref:101" class="footnote-back-ref">↩</a></p></li> <li id="fn:102"><p>Vye-Brown et al. 2014, p. 2. - Vye-Brown, C.; Crummy, J.; Smith, K.; Mruma, A.; Kabelwa, H. (2014). "Volcanic hazards in Tanzania". <a href="https://nora.nerc.ac.uk/id/eprint/506873/" target="_blank">https://nora.nerc.ac.uk/id/eprint/506873/</a> <a href="#fnref:102" class="footnote-back-ref">↩</a></p></li> <li id="fn:103"><p>Biggs et al. 2021, p. 9. - Biggs, Juliet; Ayele, Atalay; Fischer, Tobias P.; Fontijn, Karen; Hutchison, William; Kazimoto, Emmanuel; Whaler, Kathy; Wright, Tim J. (25 November 2021). "Volcanic activity and hazard in the East African Rift Zone". Nature Communications. 12 (1): 6881. Bibcode:2021NatCo..12.6881B. doi:10.1038/s41467-021-27166-y. ISSN 2041-1723. PMC 8616933. PMID 34824232. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8616933" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8616933</a> <a href="#fnref:103" class="footnote-back-ref">↩</a></p></li> <li id="fn:104"><p>Vye-Brown et al. 2014, p. 25. - Vye-Brown, C.; Crummy, J.; Smith, K.; Mruma, A.; Kabelwa, H. (2014). "Volcanic hazards in Tanzania". <a href="https://nora.nerc.ac.uk/id/eprint/506873/" target="_blank">https://nora.nerc.ac.uk/id/eprint/506873/</a> <a href="#fnref:104" class="footnote-back-ref">↩</a></p></li> <li id="fn:105"><p>Kervyn et al. 2010, p. 916. - Kervyn, Matthieu; Ernst, Gerald G. J.; Keller, Jörg; Vaughan, R. Greg; Klaudius, Jurgis; Pradal, Evelyne; Belton, Frederic; Mattsson, Hannes B.; Mbede, Evelyne; Jacobs, Patric (1 October 2010). "Fundamental changes in the activity of the natrocarbonatite volcano Oldoinyo Lengai, Tanzania". Bulletin of Volcanology. 72 (8): 913–931. doi:10.1007/s00445-010-0360-0. ISSN 1432-0819. S2CID 128562764. <a href="https://link.springer.com/article/10.1007/s00445-010-0360-0" target="_blank">https://link.springer.com/article/10.1007/s00445-010-0360-0</a> <a href="#fnref:105" class="footnote-back-ref">↩</a></p></li> <li id="fn:106"><p>Biggs et al. 2021, p. 3. - Biggs, Juliet; Ayele, Atalay; Fischer, Tobias P.; Fontijn, Karen; Hutchison, William; Kazimoto, Emmanuel; Whaler, Kathy; Wright, Tim J. (25 November 2021). "Volcanic activity and hazard in the East African Rift Zone". Nature Communications. 12 (1): 6881. Bibcode:2021NatCo..12.6881B. doi:10.1038/s41467-021-27166-y. ISSN 2041-1723. PMC 8616933. PMID 34824232. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8616933" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8616933</a> <a href="#fnref:106" class="footnote-back-ref">↩</a></p></li> <li id="fn:107"><p>Nyamweru 1988, p. 604. - Nyamweru, Celia (1 January 1988). "Activity of Ol Doinyo Lengai volcano, Tanzania, 1983–1987". Journal of African Earth Sciences (and the Middle East). 7 (4): 603–610. Bibcode:1988JAfES...7..603N. doi:10.1016/0899-5362(88)90110-8. ISSN 0899-5362. <a href="https://www.sciencedirect.com/science/article/abs/pii/0899536288901108" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0899536288901108</a> <a href="#fnref:107" class="footnote-back-ref">↩</a></p></li> <li id="fn:108"><p>GVP 2023, Photo Gallery. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:108" class="footnote-back-ref">↩</a></p></li> <li id="fn:109"><p>McFarlane, Lundberg & Belton 2004, p. 98. - McFarlane, D. A.; Lundberg, J.; Belton, F. (2004). "An unusual lava cave from Ol Doinyo lengai, Tanzania". Journal of Cave and Karst Studies. 66 (3): 98–101. <a href="https://scholarship.claremont.edu/wmkeckscience/58/" target="_blank">https://scholarship.claremont.edu/wmkeckscience/58/</a> <a href="#fnref:109" class="footnote-back-ref">↩</a></p></li> <li id="fn:110"><p>And have been confused for mud by non-volcanologists.[63] <a href="#fnref:110" class="footnote-back-ref">↩</a></p></li> <li id="fn:111"><p>Muthama, Mathu & Kamau 2012, p. 8. - Muthama, N. J.; Mathu, E.M.; Kamau, G. N. (December 2012). "An investigation of the transport and dispersion of atmospheric pollutants over east Africa during the Ol doinyo lengai volcanic eruption in July 2007 and march 2008". International Journal of BioChemiPhysics. 20: 7–16. Retrieved 14 March 2023. <a href="http://erepository.uonbi.ac.ke/handle/11295/36396" target="_blank">http://erepository.uonbi.ac.ke/handle/11295/36396</a> <a href="#fnref:111" class="footnote-back-ref">↩</a></p></li> <li id="fn:112"><p>McFarlane, Lundberg & Belton 2004, p. 98. - McFarlane, D. A.; Lundberg, J.; Belton, F. (2004). "An unusual lava cave from Ol Doinyo lengai, Tanzania". Journal of Cave and Karst Studies. 66 (3): 98–101. <a href="https://scholarship.claremont.edu/wmkeckscience/58/" target="_blank">https://scholarship.claremont.edu/wmkeckscience/58/</a> <a href="#fnref:112" class="footnote-back-ref">↩</a></p></li> <li id="fn:113"><p>GVP 2023, Photo Gallery. - "Ol Doinyo Lengai". Global Volcanism Program. Smithsonian Institution. Retrieved 14 March 2023. <a href="https://volcano.si.edu/volcano.cfm?vn=222120" target="_blank">https://volcano.si.edu/volcano.cfm?vn=222120</a> <a href="#fnref:113" class="footnote-back-ref">↩</a></p></li> <li id="fn:114"><p>Dawson et al. 1994, p. 799. - Dawson, J. B.; Pinkerton, H.; Pyle, D. M.; Nyamweru, C. (1994). "June 1993 eruption of Oldoinyo Lengai, Tanzania: exceptionally viscous and large carbonatite lava flows and evidence for coexisting silicate and carbonate magmas". Geology. 22 (9): 799–802. Bibcode:1994Geo....22..799D. doi:10.1130/0091-7613(1994)022<0799:JEOOLT>2.3.CO;2. <a href="https://pubs.geoscienceworld.org/gsa/geology/article-abstract/22/9/799/206195/June-1993-eruption-of-Oldoinyo-Lengai-Tanzania" target="_blank">https://pubs.geoscienceworld.org/gsa/geology/article-abstract/22/9/799/206195/June-1993-eruption-of-Oldoinyo-Lengai-Tanzania</a> <a href="#fnref:114" class="footnote-back-ref">↩</a></p></li> <li id="fn:115"><p>Rey et al. 2021, p. 79. - Rey, Tony; Leone, Frederic; Defossez, Stéphanie; Gherardi, Monique; Parat, Fleurice (7 July 2021). "Volcanic hazards assessment of Oldoinyo Lengai in a data scarcity context (Tanzania)". Territorium (28(II)): 69–81. doi:10.14195/1647-7723_28-2_6. ISSN 1647-7723. S2CID 237769341. <a href="https://impactum-journals.uc.pt/territorium/article/view/9555" target="_blank">https://impactum-journals.uc.pt/territorium/article/view/9555</a> <a href="#fnref:115" class="footnote-back-ref">↩</a></p></li> <li id="fn:116"><p>Dye et al. 2022, p. 30. - Dye, Mike; Stamps, D. Sarah; Mason, Myles; Saria, Elifuraha (1 March 2022). "Toward Autonomous Detection of Anomalous GNSS Data Via Applied Unsupervised Artificial Intelligence". International Journal of Semantic Computing. 16 (1): 29–45. doi:10.1142/S1793351X22400025. ISSN 1793-351X. <a href="https://www.worldscientific.com/doi/10.1142/S1793351X22400025" target="_blank">https://www.worldscientific.com/doi/10.1142/S1793351X22400025</a> <a href="#fnref:116" class="footnote-back-ref">↩</a></p></li> <li id="fn:117"><p>Rey et al. 2021, p. 72. - Rey, Tony; Leone, Frederic; Defossez, Stéphanie; Gherardi, Monique; Parat, Fleurice (7 July 2021). "Volcanic hazards assessment of Oldoinyo Lengai in a data scarcity context (Tanzania)". Territorium (28(II)): 69–81. doi:10.14195/1647-7723_28-2_6. ISSN 1647-7723. S2CID 237769341. <a href="https://impactum-journals.uc.pt/territorium/article/view/9555" target="_blank">https://impactum-journals.uc.pt/territorium/article/view/9555</a> <a href="#fnref:117" class="footnote-back-ref">↩</a></p></li> <li id="fn:118"><p>Dye et al. 2022, p. 30. - Dye, Mike; Stamps, D. Sarah; Mason, Myles; Saria, Elifuraha (1 March 2022). "Toward Autonomous Detection of Anomalous GNSS Data Via Applied Unsupervised Artificial Intelligence". International Journal of Semantic Computing. 16 (1): 29–45. doi:10.1142/S1793351X22400025. ISSN 1793-351X. <a href="https://www.worldscientific.com/doi/10.1142/S1793351X22400025" target="_blank">https://www.worldscientific.com/doi/10.1142/S1793351X22400025</a> <a href="#fnref:118" class="footnote-back-ref">↩</a></p></li> <li id="fn:119"><p>Rey et al. 2021, p. 72. - Rey, Tony; Leone, Frederic; Defossez, Stéphanie; Gherardi, Monique; Parat, Fleurice (7 July 2021). "Volcanic hazards assessment of Oldoinyo Lengai in a data scarcity context (Tanzania)". Territorium (28(II)): 69–81. doi:10.14195/1647-7723_28-2_6. ISSN 1647-7723. S2CID 237769341. <a href="https://impactum-journals.uc.pt/territorium/article/view/9555" target="_blank">https://impactum-journals.uc.pt/territorium/article/view/9555</a> <a href="#fnref:119" class="footnote-back-ref">↩</a></p></li> <li id="fn:120"><p>Morrison & Bolger 2014, p. 619. - Morrison, Thomas A.; Bolger, Douglas T. (October 2014). "Connectivity and bottlenecks in a migratory wildebeest Connochaetes taurinus population" (PDF). Oryx. 48 (4): 613–621. doi:10.1017/S0030605313000537. S2CID 84758096. <a href="https://www.cambridge.org/core/services/aop-cambridge-core/content/view/A596D0B568450D61DF2A2FDDC581F220/S0030605313000537a.pdf/connectivity-and-bottlenecks-in-a-migratory-wildebeest-connochaetes-taurinus-population.pdf" target="_blank">https://www.cambridge.org/core/services/aop-cambridge-core/content/view/A596D0B568450D61DF2A2FDDC581F220/S0030605313000537a.pdf/connectivity-and-bottlenecks-in-a-migratory-wildebeest-connochaetes-taurinus-population.pdf</a> <a href="#fnref:120" class="footnote-back-ref">↩</a></p></li> <li id="fn:121"><p>Rey et al. 2021, p. 72. - Rey, Tony; Leone, Frederic; Defossez, Stéphanie; Gherardi, Monique; Parat, Fleurice (7 July 2021). "Volcanic hazards assessment of Oldoinyo Lengai in a data scarcity context (Tanzania)". Territorium (28(II)): 69–81. doi:10.14195/1647-7723_28-2_6. ISSN 1647-7723. S2CID 237769341. <a href="https://impactum-journals.uc.pt/territorium/article/view/9555" target="_blank">https://impactum-journals.uc.pt/territorium/article/view/9555</a> <a href="#fnref:121" class="footnote-back-ref">↩</a></p></li> </ol>