Usage:
Birmingham shale [informal, unranked] in Conemaugh Formation (PA,OH,WV)
Birmingham shale [informal, unranked] in Casselman Formation (PA,WV)
Considered informal and unranked. The lithologic term should not be capitalized.
Geologic age:
Late Pennsylvanian
Type section, locality, area and/or origin of name:
Birmingham Station, west of Pittsburgh, Allegheny Co., PA (Stevenson, 1876).
AAPG geologic province:
Appalachian basin
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 ([ ]).