- Usage in publication:
-
- Cowcreek member
- Cowcreek shale member
- Modifications:
-
- Informally named
- Dominant lithology:
-
- Shale
- Siltstone
- Limestone
- Sandstone
- AAPG geologic province:
-
- Appalachian basin
Summary:
Breathitt Formation is informally elevated to group rank and subdivided into the following eight informal formations: Pocahontas, Bottom Creek, Alvy Creek, Grundy, Pikeville, Hyden, Four Corners, and Princess formations. Cowcreek member is here informally named and assigned to the Four Corners formation. Overlies Hazard coal and underlies Hazard No. 7 coal. Age is Middle Pennsylvanian (Atokan). [Revisions made in this paper are strongly contested by C. Rice and other USGS scientists who work in this area (oral commun., 9/3/93).]
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 ([ ]).