Historical:Shelbyville Coal Member
Lithostratigraphy: McLeansboro Group >>Mattoon Formation >>Shelbyville Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Missourian Series
Allostratigraphy: Absaroka Sequence
Authors
M. E. Hopkins and J. A. Simon
Name Origin
The Shelbyville Coal Member of the Mattoon Formation (Broadhead, 1875, p. 169-171, used the term "Shelby"; Worthen, 1875, p. 49, used the term "Shelbyville") is named for Shelbyville, Shelby County.
Type Section
The type section is in natural exposures and in drift and shaft mines in the vicinity of Shelbyville (11N-3-4E) (Kay, 1915, p. 215, 216).
Extent and Thickness
The coal is locally as much as 3 feet thick and can be traced in the subsurface in most of the area in which the Mattoon Formation occurs.
Stratigraphic Position
It is normally 80-120 feet below the Omega Limestone.
References
BROADHEAD, G. C., 1875, Geology of Shelby County: Geological Survey of Illinois, v. 6, p. 163-174.
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.
WORTHEN, A. H., 1875, Geology and paleontology: Geological Survey of Illinois, v. 6, 532 p.
ISGS Codes
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