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National Geologic Map Database

NGMDB

Geologic Unit: Eggleston

Usage:

Eggleston Formation (TN*,VA*,WV*)
Eggleston Formation of Trenton Group (WV)
Eggleston Limestone (KY,TN*,VA*)
Eggleston Limestone of Chickamauga Group (TN)


Subunits:

(alphabetical): Deicke K-bentonite Bed (TN,VA,WV), Millbrig K-bentonite Bed (TN,VA,WV), Walker Mountain Sandstone Member (VA).


Geologic age:

Middle Ordovician*
Ordovician, Late


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

Along State Highway 8, 1 mi north of Narrows, Giles Co., VA. Also well exposed 1.1 mi south of Eggleston (Mathews, 1934).


AAPG geologic province:

Appalachian basin*


NGMDB

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 ([ ]).

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Page Last Modified: Tue Jun 3 16:08:19 2014