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Emeishan Traps - Wikipedia

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href="https://de.wikipedia.org/wiki/Emeishan-Trapp" title="Emeishan-Trapp – German" lang="de" hreflang="de" data-title="Emeishan-Trapp" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Traps_de_Emeishan" title="Traps de Emeishan – Spanish" lang="es" hreflang="es" data-title="Traps de Emeishan" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Trapps_d%27Emeishan" title="Trapps d&#039;Emeishan – French" lang="fr" hreflang="fr" data-title="Trapps d&#039;Emeishan" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%96%B4%EB%A9%94%EC%9D%B4%EC%82%B0_%ED%8A%B8%EB%9E%A9" title="어메이산 트랩 – Korean" lang="ko" hreflang="ko" data-title="어메이산 트랩" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Emeishan_Traps" title="Emeishan Traps – Indonesian" lang="id" hreflang="id" data-title="Emeishan Traps" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Trappi_dell%27Emeishan" title="Trappi dell&#039;Emeishan – Italian" lang="it" hreflang="it" data-title="Trappi dell&#039;Emeishan" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%93%D7%A8%D7%92%D7%95%D7%AA_%D7%90%D7%95%D7%9E%D7%99%D7%99%D7%A9%D7%90%D7%9F" title="מדרגות אומיישאן – Hebrew" lang="he" hreflang="he" data-title="מדרגות אומיישאן" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Perangkap_Emeishan" title="Perangkap Emeishan – Malay" lang="ms" hreflang="ms" data-title="Perangkap Emeishan" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Emeishan_Traps" title="Emeishan Traps – Simple English" lang="en-simple" hreflang="en-simple" data-title="Emeishan Traps" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%95%D0%BC%D0%B5%D0%B9%D1%88%D0%B0%D0%BD%D1%81%D1%8C%D0%BA%D1%96_%D1%82%D1%80%D0%B0%D0%BF%D0%B8" title="Емейшанські трапи – Ukrainian" lang="uk" hreflang="uk" data-title="Емейшанські трапи" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%B3%A8%E5%B5%8B%E5%B1%B1%E6%9A%97%E8%89%B2%E5%B2%A9" title="峨嵋山暗色岩 – Chinese" lang="zh" hreflang="zh" data-title="峨嵋山暗色岩" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet 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class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Flood basalt igneous province in south-western China</div> <p>The <b>Emeishan Traps</b> constitute a <a href="/wiki/Flood_basalt" title="Flood basalt">flood basalt</a> volcanic province, or <a href="/wiki/Large_igneous_province" title="Large igneous province">large igneous province</a>, in south-western China, centred in <a href="/wiki/Sichuan" title="Sichuan">Sichuan</a> province. It is sometimes referred to as the <b>Permian Emeishan Large Igneous Province</b> or <b>Emeishan Flood Basalts</b>. Like other <a href="/wiki/Volcanic" class="mw-redirect" title="Volcanic">volcanic</a> provinces or "<a href="/wiki/Trap_rock" title="Trap rock">traps</a>", the Emeishan Traps are multiple layers of <a href="/wiki/Igneous_rock" title="Igneous rock">igneous rock</a> laid down by large <a href="/wiki/Mantle_plume" title="Mantle plume">mantle plume</a> volcanic eruptions. The Emeishan Traps eruptions were serious enough to have global <a href="/wiki/Ecological" class="mw-redirect" title="Ecological">ecological</a> and <a href="/wiki/Paleontological" class="mw-redirect" title="Paleontological">paleontological</a> impact.<sup id="cite_ref-Bond2015_1-0" class="reference"><a href="#cite_note-Bond2015-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup> </p><p>It is named for <a href="/wiki/Mount_Emei" title="Mount Emei">Emeishan</a>, a mountain in Sichuan. </p> <style data-mw-deduplicate="TemplateStyles:r1044870489">@media all and (max-width:720px){body.skin-minerva .mw-parser-output .tocright{display:none}.mw-parser-output .tocright{width:100%!important}}@media all and (min-width:720px){.mw-parser-output .tocright{float:right;clear:right;width:auto;margin:0 0 0.5em 1em}.mw-parser-output .tocright-clear-left{clear:left}.mw-parser-output .tocright-clear-both{clear:both}.mw-parser-output .tocright-clear-none{clear:none}}</style><div class="tocright"><meta property="mw:PageProp/toc" /></div> <div class="mw-heading mw-heading2"><h2 id="Etymology">Etymology</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Emeishan_Traps&amp;action=edit&amp;section=1" title="Edit section: Etymology"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The term "<a href="/wiki/Trap_rock" title="Trap rock">trap</a>" has been used in <a href="/wiki/Geology" title="Geology">geology</a> since 1785–1795 for such <a href="/wiki/Rock_formation" class="mw-redirect" title="Rock formation">rock formations</a>. It is derived from the Swedish word for stairs ("trappa") and refers to the step-like hills forming the landscape of the region.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Formation_and_development">Formation and development</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Emeishan_Traps&amp;action=edit&amp;section=2" title="Edit section: Formation and development"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The eruptions that produced the Emeishan Traps began 265 million years ago (Ma) or earlier.<sup id="cite_ref-:0_3-0" class="reference"><a href="#cite_note-:0-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:1_4-0" class="reference"><a href="#cite_note-:1-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> The main eruptive period is between 262 and 261&#160;Ma, and the volcanism activities end 259&#160;Ma.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> </p><p>In volume, the Emeishan Traps are dwarfed by the massive <a href="/wiki/Siberian_Traps" title="Siberian Traps">Siberian Traps</a>, which occurred, in terms of the <a href="/wiki/Geological_time_scale" class="mw-redirect" title="Geological time scale">geological time scale</a>, not long after, at approximately 252&#160;Ma. The Emeishan <a href="/wiki/Basalt" title="Basalt">basalts</a> covers an area of more than 250,000&#160;km<sup>2</sup> with thicknesses ranging from several hundred meters up to 5.5&#160;km (the average flood basalt thickness throughout the entire region is estimated to be around 700&#160;m), but the Emeishan traps may have initially covered an area as much as 500,000&#160;km<sup>2</sup>.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> Thus the entire volume of the Emeishan basalts is estimated to be 300,000&#160;km<sup>3</sup>.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> Evidence suggests that the initial volcanism of the central Emeishan Traps occurred in a deep submarine environment without any significant prevolcanic uplift.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p><p>The Emeishan Traps are associated with the end-<a href="/wiki/Capitanian_mass_extinction_event" title="Capitanian mass extinction event">Capitanian mass extinction event</a>, the extinction of <a href="/wiki/Animal" title="Animal">animal</a> and <a href="/wiki/Plant" title="Plant">plant</a> life that occurred at the end of the <a href="/wiki/Capitanian" title="Capitanian">Capitanian</a> stage of the Guadalupian <a href="/wiki/Epoch_(reference_date)" class="mw-redirect" title="Epoch (reference date)">epoch</a> of the <a href="/wiki/Permian" title="Permian">Permian</a> period.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> Limestone within the traps show the extinction to occur immediately below the first eruptive unit, with the mass extinction marked at the onset of explosive Emeishan volcanism.<sup id="cite_ref-:0_3-1" class="reference"><a href="#cite_note-:0-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> The formation of volcaniclastics suggest violent <a href="/wiki/Phreatomagmatic_eruption" title="Phreatomagmatic eruption">phreatomagmatic-style eruptions</a>.<sup id="cite_ref-:1_4-1" class="reference"><a href="#cite_note-:1-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> The synchrony between the Emeishan Traps and the <a href="/wiki/End-Guadalupian_extinction" class="mw-redirect" title="End-Guadalupian extinction">end-Guadalupian extinction</a> has been taken to support the argument of <a href="/wiki/Vincent_Courtillot" title="Vincent Courtillot">Vincent Courtillot</a> and others that volcanism is the main driver of mass extinctions.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> </p><p>After their emplacement, the Emeishan Traps were eroded and their minerals became encased in coals that formed after their emplacement.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Emeishan_Traps&amp;action=edit&amp;section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Deccan_Traps" title="Deccan Traps">Deccan Traps</a></li> <li><a href="/wiki/Late_Devonian_extinction#Magmatism" title="Late Devonian extinction">Viluy Traps</a></li> <li><a href="/wiki/List_of_flood_basalt_provinces" title="List of flood basalt provinces">List of flood basalt provinces</a></li> <li><a href="/wiki/Siberian_Traps" title="Siberian Traps">Siberian Traps</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Emeishan_Traps&amp;action=edit&amp;section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <dl><dt>Citations</dt> <dd></dd></dl> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 25em;"> <ol class="references"> <li id="cite_note-Bond2015-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Bond2015_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free 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(2007) <i>Superplumes: Beyond Plate Tectonics.</i> New York, Springer-Verlag.</li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Emeishan_Traps&amp;action=edit&amp;section=5" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://argonlab.gl.ntu.edu.tw/papers/Lo-Emeishan.pdf">Age of the Emeishan Flood Magmatism and Relations to Permian-Triassic Boundary Events.</a></li> <li><a rel="nofollow" class="external text" href="http://www.nature.com/ngeo/journal/v1/n9/abs/ngeo281.html">Nature</a> - "Re-evaluating plume-induced uplift in the Emeishan large igneous province"</li> <li><a rel="nofollow" class="external text" href="http://www.sciencemag.org/cgi/content/short/324/5931/1179">Science</a> - "Volcanism, Mass Extinction, and Carbon Isotope Fluctuations in the Middle Permian of China"</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · 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abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Large_igneous_provinces" title="Template:Large igneous provinces"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Large_igneous_provinces" title="Template talk:Large igneous provinces"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Large_igneous_provinces" title="Special:EditPage/Template:Large igneous provinces"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Large_igneous_provinces163" style="font-size:114%;margin:0 4em"><a href="/wiki/Large_igneous_province" title="Large igneous province">Large igneous provinces</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Agulhas_Plateau" title="Agulhas Plateau">Agulhas</a> (<span style="font-size:85%;"><a href="/wiki/Northeast_Georgia_Rise" title="Northeast Georgia Rise">Northeast Georgia Rise</a>, <a href="/wiki/Maud_Rise" title="Maud Rise">Maud Rise</a></span>)</li> <li><a href="/wiki/Azores_Plateau" title="Azores Plateau">Azores</a></li> <li><a href="/wiki/Brazilian_Highlands" title="Brazilian Highlands">Brazilian Highlands</a></li> <li><a href="/wiki/Caribbean_large_igneous_province" title="Caribbean large igneous province">Caribbean</a></li> <li><a href="/wiki/Central_Atlantic_magmatic_province" title="Central Atlantic magmatic province">Central Atlantic</a></li> <li><a href="/wiki/Central_Iapetus_Magmatic_Province" title="Central Iapetus Magmatic Province">Central Iapetus</a></li> <li><a href="/wiki/Circum-Superior_Belt" title="Circum-Superior Belt">Circum-Superior</a></li> <li><a href="/wiki/Columbia_River_Basalt_Group" title="Columbia River Basalt Group">Columbia River</a></li> <li><a href="/wiki/Deccan_Traps" title="Deccan Traps">Deccan</a></li> <li><a class="mw-selflink selflink">Emeishan</a></li> <li><a href="/wiki/Ethiopia-Yemen_Continental_Flood_Basalts" title="Ethiopia-Yemen Continental Flood Basalts">Ethiopian and Yemen Highlands</a></li> <li><a href="/wiki/Equatorial_Atlantic_Magmatic_Province" title="Equatorial Atlantic Magmatic Province">Equatorial Atlantic</a></li> <li><a href="/wiki/Franklin_Large_Igneous_Province" title="Franklin Large Igneous Province">Franklin</a> (<span style="font-size:85%;"><a href="/wiki/Franklin_dike_swarm" title="Franklin dike swarm">Franklin dike swarm</a></span>)</li> <li><a href="/wiki/High_Arctic_Large_Igneous_Province" title="High Arctic Large Igneous Province">High Arctic</a> (<span style="font-size:85%;"><a href="/wiki/Sverdrup_Basin_Magmatic_Province" title="Sverdrup Basin Magmatic Province">Sverdrup Basin</a></span>)</li> <li><a href="/wiki/Iceland_Plateau" title="Iceland Plateau">Iceland</a></li> <li><a href="/wiki/Karoo-Ferrar" title="Karoo-Ferrar">Karoo-Ferrar</a></li> <li><a href="/wiki/Kerguelen_Plateau" title="Kerguelen Plateau">Kerguelen</a> (<span style="font-size:85%;"><a href="/wiki/Broken_Ridge" title="Broken Ridge">Broken Ridge</a></span>)</li> <li><a href="/wiki/Marathon_Large_Igneous_Province" title="Marathon Large Igneous Province">Marathon</a></li> <li><a href="/wiki/Midcontinent_Rift_System" title="Midcontinent Rift System">Keweenawan</a></li> <li><a href="/wiki/Long_Range_dikes" title="Long Range dikes">Long Range</a></li> <li><a href="/wiki/Mackenzie_Large_Igneous_Province" title="Mackenzie Large Igneous Province">Mackenzie</a> (<span style="font-size:85%;"><a href="/wiki/Coppermine_River_Group" title="Coppermine River Group">Coppermine River</a></span></li> <li><span style="font-size:85%;"><a href="/wiki/Mackenzie_dike_swarm" title="Mackenzie dike swarm">Mackenzie dike swarm</a></span>)</li> <li><a href="/wiki/Matachewan_dike_swarm" title="Matachewan dike swarm">Matachewan</a></li> <li><a href="/wiki/Mistassini_dike_swarm" title="Mistassini dike swarm">Mistassini</a></li> <li><a href="/wiki/North_Atlantic_Igneous_Province" title="North Atlantic Igneous Province">North Atlantic</a></li> <li><a href="/wiki/Ongeluk_Large_Igneous_Province" title="Ongeluk Large Igneous Province">Ongeluk</a></li> <li><a href="/wiki/Ontong_Java_Plateau" title="Ontong Java Plateau">Ontong Java</a>-<a href="/wiki/Manihiki_Plateau" title="Manihiki Plateau">Manihiki</a>-<a href="/wiki/Hikurangi_Plateau" title="Hikurangi Plateau">Hikurangi</a></li> <li><a href="/wiki/Panjal_Traps" title="Panjal Traps">Panjal</a></li> <li><a href="/wiki/Paran%C3%A1_and_Etendeka_traps" title="Paraná and Etendeka traps">Paraná and Etendeka</a></li> <li><a href="/wiki/Shatsky_Rise" title="Shatsky Rise">Shatsky</a></li> <li><a href="/wiki/Siberian_Traps" title="Siberian Traps">Siberian</a></li> <li><a href="/wiki/Skagerrak-Centered_Large_Igneous_Province" title="Skagerrak-Centered Large Igneous Province">Skagerrak</a></li> <li><a href="/wiki/Ungava_magmatic_event" title="Ungava magmatic event">Ungava</a></li> <li><a href="/wiki/Winagami_sill_complex" title="Winagami sill complex">Winagami</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><b><span class="nowrap"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:WikiProject_Geology.svg" class="mw-file-description"><img alt="icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e7/WikiProject_Geology.svg/15px-WikiProject_Geology.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e7/WikiProject_Geology.svg/23px-WikiProject_Geology.svg.png 1.5x, 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