https://ilstratwiki.web.illinois.edu/index.php?title=Birds_Member&feed=atom&action=historyBirds Member - Revision history2024-03-28T19:57:16ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Birds_Member&diff=15290&oldid=prevJennifer.Obrad at 20:21, 11 January 20172017-01-11T20:21:25Z<p></p>
<p><b>New page</b></p><div>{{Editwithform}}<br />
{{Tree<br />
|category1=Paleozoic Erathem<br />
|category2=Silurian System<br />
|category3=Tippecanoe Sequence<br />
|category4=Hunton Limestone Megagroup<br />
|category5=Alexandrian Series<br />
|category6=Wilhelmi Formation<br />
|tree1=Hunton Limestone Megagroup<br />
|tree2=Wilhelmi Formation<br />
|tree3=Birds Member<br />
|tree21=Paleozoic Erathem<br />
|tree22=Silurian System<br />
|tree23=Alexandrian Series<br />
|tree31=Tippecanoe 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 />
H. B. Willman and Elwood Atherton<br />
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==Name==<br />
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===Original description===<br />
The Birds Member of the Wilhelmi Formation (Willman, 1973, p. 13).<br />
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===Derivation===<br />
Named for the railroad siding at Birds, 2 miles northwest of the type section.<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 location===<br />
The type section of the Birds Member is part of the Wilhelmi Formation type section, located in a railroad cut about 5 miles southwest of Wilhelmi Airport (SE SW SE 35, 35N-9E).<br />
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===Type author&#40;s&#41;===<br />
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===Type status===<br />
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==Reference section==<br />
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===Reference location===<br />
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===Reference author&#40;s&#41;===<br />
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===Reference status===<br />
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==Stratigraphic relationships==<br />
The Birds Member overlies the Schweizer Member of the Wilhelmi Formation.<br />
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==Extent and thickness==<br />
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==Lithology==<br />
The uppermost part of the member and its contact with the overlying Elwood Formation are exposed in a ravine half a mile northeast (NW NW SE 36, 35N-9E). The Birds Member consists of 10-20 feet of slightly to moderately argillaceous, slightly cherty, thin-bedded, medium-gray dolomite. It is distinguished by several thin beds of relatively pure, finely laminated, fossiliferous dolomite.<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 />
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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 />
WILLMAN, H. B., 1973, Rock stratigraphy of the Silurian System in northeastern and northwestern Illinois: Illinois State Geological Survey Circular 479, 55 p.<br />
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{{Codes<br />
|membercode=6990<br />
|geo_unit=--<br />
}}</div>Jennifer.Obrad