USGS Visual Identifier
National Geologic Map Database logo GEOLEX database


Geologic Unit: Ashe

Usage:
Ashe Formation (NC*,VA*)
Ashe Metamorphic Suite (NC)
Ashe Formation of Lynchburg Group (VA)

Age:
Precambrian
Proterozoic, Late
Cambrian*
Ordovician, Early*
Geologic Province:
Piedmont-Blue Ridge province*



Areal Extent:
NC*
VA*



Type Locality:
Along South Fork of New River, between bridge along NC Highway 163 and nonconformity at base of formation, 23.7 km north-northeast along Ashe-Alleghany Co. line, Lat. 36 deg. 31 min. 20 sec. N., Long. 81 deg. 19 min. 50 sec. W. Named from Ashe Co., northwestern NC (Rankin, 1970).

Unit Name History:
Named Ashe Formation (Rankin, 1970).
Areal limits; Overview (Rankin and others, 1972).
Overview (Hurst, 1973).
Areal limits; Overview (Espenshade and others, 1975).
Redescribed as Ashe Metamorphic Suite (Abbott and Raymond, 1984).
NC State Geol. Map usage (Brown and others, 1985).
Age modified; Isotopic dating; Overview (Merschat and Wiener, 1988).
Overview; Age modified (Raymond and others, 1989).
Revised (Rankin and others, 1993).
Age modified (Rankin, 1993).
Revised, VA Geol. Survey usage (Rader and others, 1993).

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