USGS Visual Identifier
National Geologic Map Database logo GEOLEX database


Geologic Unit: Wardell

Usage:
Wardell Formation (VA,TN)
Wardell Limestone (VA)
Wardell Formation of Black River Group (VA*, WV*)
Wardell Formation of Chickamauga Group (TN)

Age:
Ordovician, Middle*
Blackriveran*

Geologic Province:
Appalachian basin*


Areal Extent:
VA*
WV*
TN

Type Locality:
Type section: about 150 ft east of County Road 610, about 1 mi north of ford across Little River, Tazewell Co., VA. Named from settlement of Wardell near Tazewell-Russell Co. line (Cooper and Prouty, 1943).

Unit Name History:
Named Wardell formation (Cooper and Prouty, 1943).
Extended into TN (Prouty, 1946).
Revised to Wardell limestone (Brent, 1963).
Revised, assigned to Chickamauga Group (Ruppel and Walker, 1984).
Revised; Areal limits (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