Usage:
Ashlock Formation (KY*)
Subunits:
(alphabetical) --all in KY*: Gilbert Member, Grant Lake Member, Reba Member, Stingy Creek Member, Sunset Member, Tate Member, Terrill Member.
Geologic age:
Late Ordovician (Cincinnatian; Maysvillian to Richmondian)*
Type section, locality, area and/or origin of name:
Type section: outcrops along north bank of Dix River and in roadcuts of U.S. Highway 27 north of river, [approx. Lat. 37 deg. 34 min. 24 sec. N., Long. 84 deg. 36 min. 51 sec. W.], Lancaster 7.5-min quadrangle, Lincoln Co., KY (Weir and others, 1965).
Reference section: along north bank of Dix River beginning 0.8 mi west of U.S. Highway 27, about 4 mi north of Stanford, [approx. Lat. 37 deg. 34 min. 30 sec. N., Long. 84 deg. 37 min. 49 min. W.], Stanford 7.5-min quadrangle, Lincoln Co., KY (Weir and others, 1965).
Named from Ashlock Cemetery near U.S. Highway 27 about 0.1 mi north Dix River, Lancaster 7.5-min quadrangle, northeastern Lincoln Co., KY (Weir and others, 1965).
AAPG geologic province:
Cincinnati arch*
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 ([ ]).