Usage:
No current usage.
(†Blacksnake Sandstone Member of †Hance Formation (KY) abandoned. Is same as Cawood sandstone member (informal) of Breathitt Formation [or Cawood sandstone member (informal) of Pikeville Formation of Breathitt Group]. See Cawood.)
Geologic age:
late Early Pennsylvanian (Bashkirian; Westphalian B; early, but not earliest Atokan)
Type section, locality, area and/or origin of name:
Notable exposures in Cumberland Gap district, southeastern KY (Ashley and Glenn, 1906).
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 ([ ]).