Litchfield Coal Member
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.
M. E. Hopkins and J. A. Simon
The Litchfield Coal Member of the Spoon Formation (Kay, 1915, table 9 and footnote, p. 139).
Named for Litchfield, Montgomery County, where the coal was mined at a depth of 684 feet in the Litchfield Collieries Company Mine No. 7.
The type section is at the Litchfield Collieries Company Mine No. 7 (SE NE NE 32, 9N-5W).
Extent and thickness
In the mine, the Litchfield Coal occurs about 150 feet below the Lowell Coal and is 2-7 feet thick. It is not widely recognized throughout southern Illinois but has been found in a few drill holes.
Well log characteristics
Age and correlation
The Litchfield Coal is probably equivalent to the lower bench of the Assumption Coal and to the Rock Island (No. 1) Coal.
Environments of deposition
KAY, F. H., 1915, Coal resources of District VII (Coal No. 6 west of Duquoin anticline): Illinois State Geological Survey Mining Investigations 11, 233 p.
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