Usage:
Bald Hill Bentonite Beds (MD,NY,PA,VA,WV)
Geologic age:
Early Devonian
Type section, locality, area and/or origin of name:
Type section: exposures in roadcut, north side of U.S. Route 22, 1.7 km east of Hollidaysburg, Frankstown Twp., Blair Co., central PA (Smith and Way, 1988).
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 ([ ]).