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Wasatchian
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<h2 id="definition">Definition</h2> <p>The age is named after the <a href="/facts/Wasatch_Formation/NGqTU5ru">Wasatch Formation</a>, a highly fossiliferous stratigraphic unit stretching across six of the United States from <a href="/facts/Idaho/68ELs9Um">Idaho</a> and <a href="/facts/Montana/jPFKMuK5">Montana</a> in the north through <a href="/facts/Utah/te7zUyBX">Utah</a> and <a href="/facts/Wyoming/kuKmWryL">Wyoming</a> to <a href="/facts/Colorado/IgIHrJI5">Colorado</a> and <a href="/facts/New_Mexico/wosJCGaW">New Mexico</a> in the south. </p> <h2 id="substages">Substages</h2> <p>The Wasatchian is considered to contain the following substages: </p> <ul><li>Sandcouleean: shares lower boundary with the beginning of the Wasatchian age and shares upper boundary with the base of the Graybullian.</li> <li>Graybullian: shares lower boundary with the end of the Sandcouleean subage and upper boundary with the base of the Lysitean.</li> <li>Lysitean: shares lower boundary with the end of the Graybullian subage and upper boundary with the base of the Lostcabinian.</li> <li>Lostcabinian: shares lower boundary with the end of the Lysitean subage and upper boundary with the beginning of the Bridgerian.</li></ul> <h2 id="wasatchian-correlations">Wasatchian correlations</h2> Wasatchian correlations in <a href="/facts/North_American_land_mammal_age/B4d6qaIt">North America</a><table><tbody><tr><th>Formation</th><th><a href="/facts/Wasatch_Formation/NGqTU5ru">Wasatch</a></th><th><a href="/facts/DeBeque_Formation/cYldYAz6">DeBeque</a></th><th><a href="/facts/Claron_Formation/lkVjHb02">Claron</a></th><th><a href="/facts/Indian_Meadows_Formation/KNcuGKkM">Indian Meadows</a></th><th><a href="/facts/Pass_Peak_Formation/y2edYW0Y">Pass Peak</a></th><th><a href="/facts/Tatman_Formation/Q8aC070W">Tatman</a></th><th><a href="/facts/Willwood_Formation/9txe24R2">Willwood</a></th><th><a href="/facts/Golden_Valley_Formation/w7zzQYbI">Golden Valley</a></th><th><a href="/facts/Coldwater_Beds/omUDJaJS">Coldwater</a></th><th><a href="/facts/Allenby_Formation/8AowXWFX">Allenby</a></th><th>Kamloops</th><th>Ootsa Lake</th><th><a href="/facts/Margaret_Formation/qbHgbS7u">Margaret</a></th><th><a href="/facts/Nanjemoy_Formation/JKx8MuBU">Nanjemoy</a></th><th><a href="/facts/Hatchetigbee_Bluff_Formation/aEwvIUl3">Hatchetigbee</a></th><th><a href="/facts/Las_Tetas_de_Cabra_Formation/8u86GTBv">Tetas de Cabra</a></th><th><a href="/facts/Hannold_Hill_Formation/TzK6en89">Hannold Hill</a></th><th><a href="/facts/Coalmont_Formation/2G0LIU84">Coalmont</a></th><th><a href="/facts/Cuchara_Formation/sjIpGLPK">Cuchara</a></th><th><a href="/facts/Galisteo_Formation/JWro5w8q">Galisteo</a></th><th><a href="/facts/San_Jose_Formation/JqPSkdW3">San Jose</a></th><th>Ypresian (IUCS) • Itaboraian (<a href="/facts/South_American_land_mammal_age/r4LRYelg">SALMA</a>)<a href="/facts/Bumbanian/SNhDUHeG">Bumbanian</a> (<a href="/facts/Asian_land_mammal_age/mSu67Gde">ALMA</a>) • <a href="/facts/Mangaorapan/ycr8K7ez">Mangaorapan</a> (NZ)</th></tr><tr><th>Basin</th><th><a href="/facts/Powder_River_Basin/lc5SLPh0">Powder River</a><a href="/facts/Uinta_Basin/J8yu0a64">Uinta</a><a href="/facts/Piceance_Basin/eFDIwA6S">Piceance</a><a href="/facts/Colorado_Plateau/enUuFcL5">Colorado Plateau</a><a href="/facts/Wind_River_Basin/9pJ4fxMl">Wind River</a><a href="/facts/Green_River_Basin/Vj1RgGFX">Green River</a><a href="/facts/Bighorn_Basin/gvTKxYoS">Bighorn</a></th><th><a href="/facts/Piceance_Basin/eFDIwA6S">Piceance</a></th><th><a href="/facts/Colorado_Plateau/enUuFcL5">Colorado Plateau</a></th><th><a href="/facts/Wind_River_Basin/9pJ4fxMl">Wind River</a></th><th><a href="/facts/Green_River_Basin/Vj1RgGFX">Green River</a></th><th colspan="2"><a href="/facts/Bighorn_Basin/gvTKxYoS">Bighorn</a></th><th><a href="/facts/Williston_Basin/m45w9gE9">Williston</a></th><th><a href="/facts/Okanagan_Highlands/T1wnJwa8">Okanagan</a></th><th>Princeton</th><th>Buck Creek</th><th>Nechako</th><th>Sverdrup</th><th>Potomac</th><th>GoM</th><th>Laguna Salada</th><th><a href="/facts/Rio_Grande_rift/fxNCItmb">Rio Grande</a></th><th><a href="/facts/North_Park_Basin/h2CMgydn">North Park</a></th><th><a href="/facts/Raton_Basin/t04Kj1Kt">Raton</a></th><th><a href="/facts/Galisteo_Basin/leUKxLeQ">Galisteo</a></th><th><a href="/facts/San_Juan_Basin/tmzXY3P6">San Juan</a></th><th rowspan="14"><a href="/facts/Coldwater_Beds/omUDJaJS"></a><a href="/facts/Margaret_Formation/qbHgbS7u"></a><a href="/facts/Galisteo_Formation/JWro5w8q"></a><a href="/facts/Tatman_Formation/Q8aC070W"></a><a href="/facts/Willwood_Formation/9txe24R2"></a><a href="/facts/Golden_Valley_Formation/w7zzQYbI"></a><a href="/facts/Nanjemoy_Formation/JKx8MuBU"></a><a href="/facts/Las_Tetas_de_Cabra_Formation/8u86GTBv"></a><a href="/facts/Coalmont_Formation/2G0LIU84"></a><a href="/facts/Allenby_Formation/8AowXWFX"></a><a href="/facts/DeBeque_Formation/cYldYAz6"></a><a href="/facts/Claron_Formation/lkVjHb02"></a><a href="/facts/Indian_Meadows_Formation/KNcuGKkM"></a><a href="/facts/Pass_Peak_Formation/y2edYW0Y"></a><a href="/facts/Hatchetigbee_Bluff_Formation/aEwvIUl3"></a><a href="/facts/Hannold_Hill_Formation/TzK6en89"></a><a href="/facts/Cuchara_Formation/sjIpGLPK"></a><a href="/facts/San_Jose_Formation/JqPSkdW3"></a><a href="/facts/Wasatch_Formation/NGqTU5ru"></a>Wasatchian (North America)</th></tr><tr><th>Country</th><th colspan="8"> <a href="/facts/United_States/P0sCdLe5">United States</a></th><th colspan="5"> <a href="/facts/Canada/cWWFM8oc">Canada</a></th><th colspan="2"> <a href="/facts/United_States/P0sCdLe5">United States</a></th><th> <a href="/facts/Mexico/IT5bwhdh">Mexico</a></th><th colspan="5"> <a href="/facts/United_States/P0sCdLe5">United States</a></th></tr><tr><td><i><a href="/facts/Copelemur/rynfPccN">Copelemur</a></i></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><i><a href="/facts/Coryphodon/IaQfhTV8">Coryphodon</a></i></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><i><a href="/facts/Diacodexis/BmQTzRVy">Diacodexis</a></i></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><i><a href="/facts/Homogalax/aN86T7BV">Homogalax</a></i></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><i><a href="/facts/Oxyaena/HD3U6h11">Oxyaena</a></i></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><i><a href="/facts/Paramys/RDGLE60d">Paramys</a></i></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><a href="/facts/Primate/Hl8RNE2X">Primates</a></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><a href="/facts/Bird/RJF6zwLP">Birds</a></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><a href="/facts/Reptile/04n1uKf1">Reptiles</a></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><a href="/facts/Fish/fln4gH9V">Fish</a></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><a href="/facts/Insect/IgDNvnUL">Insects</a></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><a href="/facts/Flora/2xkcTn2d">Flora</a></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><th><a href="/facts/Depositional_environment/D9msL28T">Environments</a></th><th>Alluvial-fluvio-lacustrine</th><th>Fluvial</th><th></th><th></th><th></th><th>Fluvial</th><th>Fluvio-lacustrine</th><th>Fluvial</th><th colspan="2">Lacustrine</th><th colspan="2">Fluvio-lacustrine</th><th>Deltaic-paludal</th><th colspan="2">Shallow marine</th><th>Fluvial</th><th>Shallow marine</th><th>Fluvial</th><th></th><th colspan="2">Fluvial</th><th rowspan="2"> Wasatchian volcanoclastics Wasatchian fauna Wasatchian flora</th></tr><tr><th>Volcanic</th><th>Yes</th><th colspan="7">No</th><th>Yes</th><th>No</th><th>Yes</th><th>No</th><th>Yes</th><th colspan="6">No</th><th>Yes</th><th>No</th></tr></tbody></table> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Paleobiology Database, Wasatchian <a href="https://paleodb.org/cgi-bin/bridge.pl?action=displayInterval&interval_no=231" target="_blank">https://paleodb.org/cgi-bin/bridge.pl?action=displayInterval&interval_no=231</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>