https://ilstratwiki.web.illinois.edu/index.php?title=Sterling_Till_Member&feed=atom&action=historySterling Till Member - Revision history2024-03-28T16:33:59ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Sterling_Till_Member&diff=15553&oldid=prevJennifer.Obrad: /* Name */2017-01-12T22:01:22Z<p><span dir="auto"><span class="autocomment">Name</span></span></p>
<p><b>New page</b></p><div>{{Editwithform}}<br />
{{Tree<br />
|category1=Cenozoic Erathem<br />
|category2=Quaternary System<br />
|category3=Pleistocene Series<br />
|category4=Glasford Formation<br />
|tree1=Glasford Formation<br />
|tree2=Sterling Till Member<br />
|tree21=Cenozoic Erathem<br />
|tree22=Quaternary System<br />
|tree23=Pleistocene Series<br />
}}<br />
==Primary source==<br />
Willman, H. B., and John C. Frye, 1970, Pleistocene Stratigraphy of Illinois: Illinois State Geological Survey Bulletin 94, 204 p.<br />
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==Contributing author&#40;s&#41;==<br />
H. B. Willman and John C. Frye<br />
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==Name==<br />
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===Original description===<br />
The Sterling Till Member of the Glasford Formation was informally named the Sterling till (Frye et al., 1969, p. 25). It is herein formally named a member (Willman and Frye, 1970).<br />
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===Derivation===<br />
The Sterling Till Member was named for Sterling, Whiteside County.<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 is the Emerson Quarry Section (Frye et al., 1969, p. 34) 2 miles west of Sterling, SE NW SE Sec. 13, T. 21 N., R. 6 E.<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 />
It is the uppermost till member of the Glasford in the region north of the Green River Lobe and is similar in clay mineral composition to the Radnor Till Member, which<br />
occupies the same stratigraphic position south of the Green River Lobe. <br><br />
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The upper boundary of the member is the top of the Sangamon Soil, or, locally, the base of the accretion-gley of the Berry Clay Member (e.g., Red Birch School, Coleta Sections, table 7). It is overlain in some places by the Winnebago Formation, the Robein Silt, the Wedron Formation, or the Peoria Loess, and it overlies the Ogle Till Member or older units.<br />
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==Extent and thickness==<br />
The Sterling Member is as much as 40 feet thick in the vicinity of Sterling, but it generally is thinner. The geographic extent of the Sterling Till Member is shown in figure 6.<br />
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==Lithology==<br />
It has an extremely high illite content. Its typical composition is given in table 2.<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 />
The Sterling Till Member is classed within the Jubileean Substage of the Illinoian Stage.<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 />
FRYE, J. C., H. D. GLASS, J. P. KEMPTON, and H. B. WILLMAN, 1969, Glacial tills of northwestern Illinois: Illinois State Geological Survey Circular 437, 47 p.<br />
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{{Codes<br />
|membercode=0840<br />
|geo_unit=g-rs<br />
}}</div>Jennifer.Obrad