Ford Station Limestone 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.
Elwood Atherton, Charles Collinson, and Jerry A. Lineback
The Ford Station Limestone Member of the Clore Formation (Swann, 1963, p. 40, 42).
Named for the Ford Station siding of the Missouri Pacific Railroad, Randolph County.
The type section of the Ford Station Limestone is located near the Ford Station siding of the Missouri Pacific Railroad, Randolph County in an abandoned quarry (NW SE 33, 7S-6W).
The Ford Station Limestone Member is the upper member of the Clore Formation.
Extent and thickness
It is 38 feet thick in the type section but ranges from 20-50 feet thick.
It consists of interbedded limestone and shale that include rare lenses of sandstone. Most of the shale in the Ford Station Member is dark gray to dark greenish gray and is generally calcareous and fossiliferous. The limestone is gray, buff, drab, or dark brownish gray, argillaceous, and shaly . Dolomite occurs irregularly.
Well log characteristics
Age and correlation
Environments of deposition
SWANN, D. H., 1963, Classification of Genevievian and Chesterian (Late Mississippian) rocks of Illinois: Illinois State Geological Survey Report of Investigations 216, 91 p.
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