No current usage.
(†Bear Mountain Member of Pocono Formation (PA) considered abandoned. Rocks reallocated to Rockwell Formation. See Rockwell.)
Early Mississippian (Kinderhookian)
Notable exposures on Horse Shoe curve, between Altoona and Gallitzin, [Altoona 15-min quadrangle], Blair Co., Northern Anthracite Field, central PA (Swartz, 1965).
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 ([ ]).