- Usage in publication:
-
- Combs Mountain siltstone member
- Modifications:
-
- Named
- Dominant lithology:
-
- Siltstone
- Shale
- Limestone
- AAPG geologic province:
-
- Cincinnati arch
Summary:
Named as a member of Brodhead formation. Named for Combs Mountain, Madison Co., central KY. Consists of siltstone with lesser amounts of shale and limestone. Thickness is 75 to 90 ft. Underlies Indian Fort shale member (new); overlies Conway Cut siltstone member (new). Age is Early Mississippian.
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 ([ ]).