https://ilstratwiki.web.illinois.edu/index.php?title=Historical:Calhoun_Coal_Member&feed=atom&action=historyHistorical:Calhoun Coal Member - Revision history2024-03-28T09:46:29ZRevision history for this page on the wikiMediaWiki 1.38.4https://ilstratwiki.web.illinois.edu/index.php?title=Historical:Calhoun_Coal_Member&diff=15985&oldid=prevJennifer.Obrad at 21:04, 20 January 20172017-01-20T21:04:56Z<p></p>
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{{Tree<br />
|tree1=McLeansboro Group <br />
|tree2=Mattoon Formation <br />
|tree3=Calhoun Coal Member <br />
|tree21=Paleozoic Erathem <br />
|tree22=Pennsylvanian Subsystem <br />
|tree23=Missourian Series <br />
|tree31=Absaroka Sequence <br />
|category1=Paleozoic Erathem <br />
|category2=Pennsylvanian Subsystem <br />
|category3=Absaroka Sequence<br />
|category4=McLeansboro Group<br />
|category5=Missourian Series<br />
|category6=Mattoon Formation<br />
|category7=Coal<br />
}}<br />
==Authors==<br />
M. E. Hopkins and J. A. Simon<br />
<br />
==Name Origin==<br />
The Calhoun Coal Member of the Mattoon Formation (Noé, 1934, p. 103) is named for Calhoun, Richland County.<br />
==Type Section==<br />
The type section is in a roadcut about 2 miles southeast of Calhoun (NE NE NE 6, 2N-14W) (Kosanke et al., 1960, p. 40,82).<br />
==Extent and Thickness==<br />
The Calhoun Coal is widespread in eastern Illinois, where it is 2 feet thick or less and is overlain by the Bonpas Limestone. The Calhoun is also present on the western side of the deeper part of the Illinois Basin, where it occurs a foot or two below the Omega Limestone.<br />
==Stratigraphic Position==<br />
The Calhoun lies about 525 feet above the Shoal Creek Limestone.<br />
==References==<br />
KOSANKE, R. M., J. A. SIMON, H. R. WANLESS, and H. B. WILLMAN, 1960, Classification of the Pennsylvanian strata of Illinois: Illinois State Geological Survey Report of Investigations 214, 84 p.<br><br />
NOÉ, A. C., 1934, Our present knowledge of American coal ball plants: Illinois Academy of Science Transactions, v. 26, no. 3, p. 103.<br />
{{Codes <br />
| membercode = 1750<br />
| geo_unit = --<br />
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