Ford Station Limestone Member
Lithostratigraphy: Pope Megagroup >>Clore Formation >>Ford Station Limestone Member
Chronostratigraphy: Paleozoic Erathem >>Mississippian Subsystem >>Chesterian Series >>Elviran Stage
Allostratigraphy: Kaskaskia Sequence
Primary source
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.
Contributing author(s)
Elwood Atherton, Charles Collinson, and Jerry A. Lineback
Name
Original description
The Ford Station Limestone Member of the Clore Formation (Swann, 1963, p. 40, 42).
Derivation
Named for the Ford Station siding of the Missouri Pacific Railroad, Randolph County.
Other names
History/background
Type section
Type location
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).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
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.
Lithology
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.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Age and correlation
Environments of deposition
Economic importance
Remarks
References
SWANN, D. H., 1963, Classification of Genevievian and Chesterian (Late Mississippian) rocks of Illinois: Illinois State Geological Survey Report of Investigations 216, 91 p.
ISGS Codes
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