Historical:Bogota Limestone Member
M. E. Hopkins and J. A. Simon
The Bogota Limestone Member of the Mattoon Formation (Newton and Weller, 1937, p. 9) is named for Bogota, Jasper County.
The type section consists of exposures along Big Muddy Creek about 6 miles southwest of Bogota (NE NE 7, 5N-8E) (Kosanke et al., 1960, p. 44, 79, 80).
Extent and Thickness
The Bogota is known definitely only in the type locality, but the name has been questionably applied to many limestone outcrops in the central part of the area of the Mattoon Formation.
In the type section the Bogota is 1.5 feet of gray, fossiliferous, nodular limestone in a yellowish brown clay matrix, and it overlies about 1 foot of black fissile shale.
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.
NEWTON, W. A., and J. M. WELLER, 1937, Stratigraphic studies of Pennsylvanian outcrops in part of southeastern Illinois: Illinois State Geological Survey Report of Investigations 45, 31 p.
|Stratigraphic Code||Geo Unit Designation|