Historical:Willis Coal Member: Difference between revisions
mNo edit summary |
(No difference)
|
Latest revision as of 20:56, 27 January 2017
Lithostratigraphy: McCormick Group >>Abbott Formation >>Willis Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Atokan Series
Allostratigraphy: Absaroka Sequence
Authors
M. E. Hopkins and J. A. Simon
Name Origin
The Willis Coal Member of the Abbott Formation (Butts, 1925, p. 62-63) is named for the Willis Mine in Gallatin County (SE SW 30, 10S-9E).
Correlation
It is correlated with the Tarter Coal of western Illinois and the Lower Block Coal Member of Indiana.
Extent and Thickness
The coal is present at widely scattered localities in the outcrop area in southern Illinois. It has been mined locally in southeastern Illinois, where it is 3-3.5 feet thick.
Stratigraphic Position
In the type area the Willis is closely underlain by the Grindstaff Sandstone Member and is immediately overlain by about 40 feet of Finnie Sandstone.
References
BUTTS, CHARLES, 1925, Geology and mineral resources of the Equality-Shawneetown area: Illinois State Geological Survey Bulletin 47, 76 p.
ISGS Codes
Stratigraphic Code | Geo Unit Designation |
---|---|