USGS Visual Identifier
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Geologic Unit: Benbolt

Usage:
Benbolt Formation of Chickamauga Group (TN)
Benbolt Formation (TN, VA)
Benbolt Limestone (TN, VA*, WV*)

Age:
Ordovician, Middle*
Blackriveran*

Geologic Province:
Appalachian basin*


Areal Extent:
WV*
TN
VA*

Type Locality:
Type section: about 1-1/8 miles south of Benbolt, west of Tazwell County Farm, VA (Cooper and Prouty, 1943).

Subunits:
Shannondale Limestone Member (VA), Burkes Garden Limestone Member (VA,TN).

Unit Name History:
Named (Cooper and Prouty, 1943).
Extended into TN (Prouty, 1946).
Revised to part of Chickamauga Group (Ruppel and Walker, 1984).
Extended into subsurface of WV; Revised (Ryder, 1992).

Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov).
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
URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html
Database project personnel
Last modified: 15-Jan-2013