https://ilstratwiki.web.illinois.edu/index.php?title=Elviran_Stage&feed=atom&action=history
Elviran Stage - Revision history
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Revision history for this page on the wiki
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2017-01-13T15:59:44Z
<p><span dir="auto"><span class="autocomment">Name</span></span></p>
<p><b>New page</b></p><div>{{Editwithform}}<br />
{{Tree<br />
|category1=Paleozoic Erathem<br />
|category2=Mississippian Subsystem<br />
|category3=Elviran Stage<br />
|category4=Kaskaskia Sequence<br />
|category5=Pope Megagroup<br />
|category6=Chesterian Series<br />
|tree1=Pope Megagroup<br />
|tree21=Paleozoic Erathem<br />
|tree22=Mississippian Subsystem<br />
|tree23=Chesterian Series<br />
|tree24=Elviran Stage<br />
|tree31=Kaskaskia Sequence<br />
}}<br />
==Primary source==<br />
Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.<br />
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==Contributing author&#40;s&#41;==<br />
Elwood Atherton, Charles Collinson, and Jerry A. Lineback<br />
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==Name==<br />
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===Original description===<br />
Elviran Stage (Swann, 1963, p. 23, 65), originally called the Elvira Group (J. M. Weller, 1939).<br />
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===Derivation===<br />
Named for Elvira Township, Johnson County (12S-2E).<br />
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===Other names===<br />
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===History&#47;background===<br />
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==Type section==<br />
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===Type status===<br />
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==Reference section==<br />
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==Stratigraphic relationships==<br />
The Elviran Stage is the youngest stage of the Chesterian Series. It includes the nine formations younger than the Glen Dean Limestone (fig. M-25).<br />
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<center><br />
{| class="wikitable" style="text-align: center;"<br />
|-<br />
|<gallery caption="" widths=250px heights=250px perrow=4><br />
Figure_M-25.jpg|{{file:Figure_M-25.jpg}}<br />
</gallery><br />
|}<br />
</center><br />
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==Extent and thickness==<br />
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==Lithology==<br />
The limestones of the Elviran Stage are generally darker and finer grained and contain more silt and argillaceous material and less abundant fossils than the older Chesterian limestones.<br />
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==Core&#40;s&#41;==<br />
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==Photograph&#40;s&#41;==<br />
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==Contacts==<br />
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==Well log characteristics==<br />
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==Fossils==<br />
Representative fossils include ''Pentremites fohsi'', ''Pterotocrinus menardensis'', ''Composita subquadrata'', ''Eumetria costata'', and ''Sulcatopinna missouriensis''.<br />
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==Age and correlation==<br />
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==Environments of deposition==<br />
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==Economic importance==<br />
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==Remarks==<br />
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==References==<br />
SWANN, D. H., 1963, Classification of Genevievian and Chesterian (Late Mississippian) rocks of Illinois: Illinois State Geological Survey Report of Investigations 216, 91 p.<br><br />
WELLER, J. M., 1939, Mississippian System: Kansas Geological Society Guidebook, 13th Annual Field Conference, southwestern Illinois and southeastern Missouri, p. 131-137.<br />
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{{Codes<br />
|membercode=4030<br />
|geo_unit=--<br />
}}</div>
Jennifer.Obrad