Usage:
Coal Cliff member (informal) of /Alvy Creek formation (informal) of Breathitt Group (KY-local)
Recognized locally in Southwestern and Upper Cumberland River districts.
Informal. The rank or lithologic term should not be capitalized. [Term "Formation" is applied to formal nomenclature (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021).]
Geologic age:
Early Pennsylvanian (Bashkirian; Westphalian A; Morrowan)
Type section, locality, area and/or origin of name:
Type section: strip mine highwall located near Coal Cliff, Nevelsville quadrangle, Wayne Co., KY. Carter coordinate location is 8-D-59, 4,500 ft from south line and 100 ft from east line (Chesnut, 1991).
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 ([ ]).