Usage:
Princess Formation of Breathitt Group (KY)
Subunits:
(alphabetical) --all in KY: Kilgore Flint Member, Obryan Member, Stoney Fork Member.
Geologic age:
Middle Pennsylvanian (Moscovian; Westphalian C-D; Atokan to Desmoinesian)
Type section, locality, area and/or origin of name:
Type area: Princess Coal Resource District, Boyd, Carter, Greenup, Lawrence, and Lewis Cos, northeastern KY (Chesnut, 1992).
Reference sections (subsurface): (1) lower half, USGS No. 5 diamond drillhole, Hazard and South quadrangles, Perry Co., KY; and (2) upper half, Kentucky Geological Survey No. R-2 diamond drillhole, Burnaugh quadrangle, KY (Chesnut, 1992).
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 ([ ]).