Usage:
Hensley Member of /Alvy Creek formation (informal) of Breathitt Group (KY)
Hensley Member of Lee Formation (KY*, and locally in TN*,VA*)
[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: exposed along Skyland Road and U.S. Highway 25E [now along Pinnacle Road and Route 988, Old Wilderness Road] on northwest side of Cumberland Gap, [approx. Lat. 36 deg. 36 min. 40 sec. N., Long. 83 deg. 40 min. 40 sec. W., Middlesboro South 7.5-min quadrangle, 1959 ed.], Bell Co., southeastern KY. Named from Hensley Flats, and upland area between the crests of Brush and Cumberland Mountains [Varilla 7.5-min quadrangle, Bell Co., southeastern KY] (Englund, 1964).
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 ([ ]).