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National Geologic Map Database

Geologic Unit: Blacksnake

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 ([ ]).