Historical:Litchfield Coal Member

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Handbook of Illinois Stratigraphy
Series Bulletin 95
Author H. B. Willman, Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, Jack A. Simon
Date 1975
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Lithostratigraphy: Kewanee Group >>Spoon Formation >>Litchfield Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka Sequence

Authors

M. E. Hopkins and J. A. Simon

Name Origin

The Litchfield Coal Member of the Spoon Formation (Kay, 1915, table 9 and footnote, p. 139) is named for Litchfield, Montgomery County, where the coal was mined at a depth of 684 feet in the Litchfield Collieries Company Mine No. 7.

Type Section

The type section is at the Litchfield Collieries Company Mine No. 7 (SE NE NE 32, 9N-5W).

Correlation

The Litchfield Coal is probably equivalent to the lower bench of the Assumption Coal and to the Rock Island (No. 1) Coal.

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.

References

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.

ISGS Codes

Stratigraphic Code Geo Unit Designation
3500
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