Trowbridge Coal Member: Difference between revisions
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Revision as of 21:31, 20 January 2017
Lithostratigraphy: McLeansboro Group >>Mattoon Formation >>Trowbridge Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Virgilian Series
Allostratigraphy: Absaroka 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)
M. E. Hopkins and J. A. Simon
Name
Original description
The Trowbridge Coal Member of the Mattoon Formation (Cady, 1948, p. 5, footnote 4).
Derivation
Named for Trowbridge, Shelby County.
Other names
History/background
Type section
Type location
The type locality consists of outcrops about 1 mile northeast of the town (S line 11, 10N-6E).
Type author(s)
Type status
Reference section
Reference location
Reference author(s)
Reference status
Stratigraphic relationships
It occurs about 150-180 feet above the Omega Limestone.
Extent and thickness
The Trowbridge attains a maximum thickness of 2.5-3 feet. It has not been traced far from the type area.
Lithology
The Trowbridge is a normally banded coal that is high in ash.
Core(s)
Photograph(s)
Contacts
Well log characteristics
Fossils
Age and correlation
Environments of deposition
Economic importance
Remarks
References
CADY, G. H., 1948, Analyses of Illinois coals: Illinois State Geological Survey Supplement Bulletin 62, 77 p.
ISGS Codes
Stratigraphic Code | Geo Unit Designation |
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