Historical:Coffeen Limestone Member
M. E. Hopkins and J. A. Simon
The Coffeen Limestone Member of the Bond Formation (Gluskoter, in Kosanke et al., 1960, p. 39) is named for Coffeen, Montgomery County.
The type section consists of outcrops along the East Fork of Shoal Creek, about 4.5 miles northeast of Coffeen (NE NW SW 7, 8N-2W).
The Coffeen Limestone probably correlates with the Riverview Limestone Member, which lies about 40 feet above the Fairbanks Coal Member of Indiana.
Extent and Thickness
The Coffeen Limestone is less than 2 feet thick in the type area. It is 8 feet above the Witt Coal in the type area and may be fairly widespread, but it has been recognized only in the northern part of southwestern Illinois.
It occurs about 80 feet below the base of the Millersville Limestone.
The Coffeen contains a varied marine fauna dominated by brachiopods, crinoids, and bryozoans.
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.
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