USGS Visual Identifier
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Geologic Unit: Tanglewood

Tanglewood Limestone Member of Lexington Limestone (KY*)

Ordovician, Middle*
Ordovician, Late*
Geologic Province:
Cincinnati arch*

Areal Extent:

Type Locality:
Type section: roadcuts along I-64 on west side of Kentucky River, Franklin Co., KY. Named from Tanglewood, a suburban area south of Frankfort, KY (Black and others, 1965).

Nicholas Bed (KY*)

Unit Name History:
Named (Black and others, 1965).
Age modified; Revised (Cressman, 1973) [From GNC index card files; not synopsized].
KY State Geol. Map usage (McDowell and others, 1981) [From GNC index card files; not synopsized].
Overview (Wahlman, 1992).
Age modified (Frey, 1995).

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