- Usage in publication:
-
- Flat Rock Member
- Modifications:
-
- First used
- AAPG geologic province:
-
- Appalachian basin
Summary:
Raccoon Mountain Formation subdivided into Norwood Cove and Flat Rock Members (both new) in Sand Mountain. Age is Early Pennsylvanian.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Flat Rock Member
- Modifications:
-
- Named
- Dominant lithology:
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- Shale
- Sandstone
- Coal
- AAPG geologic province:
-
- Appalachian basin
Summary:
Name Flat Rock Member is here formally proposed for upper member of Raccoon Mountain Formation of Gizzard Group. Type section designated in Jackson Co., northeastern AL, where unit is 150 ft thick. Reaches a maximum thickness of 200 ft. Consists of an upper gray shale and a lower light gray conglomeratic sandstone, separated by the Fabius coal seam. Sandstone is massive, cliff-forming. Unit extends into GA and TN. Unconformably underlies Warren Point Sandstone and unconformably overlies Norwood Cove Member. Age is Early Pennsylvanian.
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).