Usage:
Betsie Shale Member of Pikeville Formation of Breathitt Group (KY)
Betsie Shale Member of Breathitt Formation (KY*)
Betsie Shale Member of Wise Formation (VA*)
Betsie Shale Member of Kanawha Formation of Pottsville Group (WV*)
Betsie Shale Member of Slatestone Formation (TN*)
Geologic age:
late Early Pennsylvanian (Bashkirian; earliest Westphalian B; earliest Atokan)*
Type section, locality, area and/or origin of name:
Type section: artificial exposures above mine in Hance coal bed located about 3,200 ft (975 m) north-northwest of Betsie Gap between Blacklick and Coal Stone Branches of Brownie Creek, Varilla 7.5-min quadrangle, Bell Co., KY (Rice and others, 1987).
Reference section: 0.25+ mi exposure beginning in first roadcut along U.S. Highway 119, south of Chapmanville, west side of Guyandotte River, Logan Co., WV (Blake and others, 1994).
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 ([ ]).