Usage:
Elkins Fork shale (informal, unranked) in Pikeville Formation of Breathitt Group (KY)
Elkins Fork shale (informal, unranked) in Breathitt Formation (KY*)
Elkins Fork shale (informal, unranked) in Indian Bluff Formation (TN*)
Informal and unranked. The lithologic term should not be capitalized.
Geologic age:
Middle Pennsylvanian (Moscovian; Westphalian B; Atokan)*
Type section, locality, area and/or origin of name:
Named from exposures opposite Elkins Fork School in northern Pike Co., eastern KY (Morse, 1931).
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 ([ ]).