USGS Visual Identifier
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Geologic Unit: Brannon

Brannon Member of Lexington Limestone (KY*)

Ordovician, Middle*
Geologic Province:
Cincinnati arch*

Areal Extent:

Type Locality:
Brannon Station on the Q & C RR, Nicholasville 7.5-min quadrangle, Jessamine Co., KY. (Miller, 1913).

Unit Name History:
[Please note: only these references listed below include synopses here.]
Named Brannon bed (Miller, 1913).
Revised to Brannon Limestone (Hamilton, 1948).
Rank reduced to Brannon Member, assigned to Cynthiana Formation (Hamilton, 1950).
Revised to Brannon Member of the Lexington Limestone (Black and others, 1965).
Overview (Wahlman, 1992).
Age modified (Frey, 1995).
[Please note: the references listed below do not include synopses. McFarlan and White (1948) taken from US geologic names lexicon, USGS Bull. 1200. The remaining are from the GNC index card files.]
Overview; Revised (A.C. McFarlan and W.H. White, 1948, AAPG Bull., v. 32, no. 8, p. 1636-1637).
Contacts revised (E.R. Cressman, 1964, USGS Geol. Quad. Map GQ-303, 1 sheet, scale 1:24,000).
KY State Geol. Map usage (R.C. McDowell and others, 1981, USGS State Geol. Map, 4 sheets, scale 1:250,000; R.C. McDowell, 1981, USGS Misc. Field Studies Map MF-1291, 1 sheet).

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013