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National Geologic Map Database

Geologic Unit: Ashlock

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).