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National Geologic Map Database

Geologic Unit: Drakes

Usage:

Drakes Formation (KY*,IN*,OH*)
Drakes Formation of Cincinnati group (informal) (OH)

(informal Cincinnati group is the usage of the OH Geol. Survey. The rank or lithologic term should not be capitalized.)


Subunits:

(alphabetical) --all in KY*: Bardstown Member, Preachersville Member, Rowland Member, Saluda Dolomite Member.


Geologic age:

Late Ordovician (Cincinnatian; Richmondian)*


Type section, locality, area and/or origin of name:

Type section: Along dirt road from Preachersville to Cartersville, near East Fork of Drakes Creek, Paint Lick quadrangle, in southern Garrard 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 ([ ]).