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.
Late Pennsylvanian
Birmingham Station, west of Pittsburgh, Allegheny Co., PA (Stevenson, 1876).
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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).