USGS Visual Identifier
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Geologic Unit: Spruce Pine

Spruce Pine Plutonic Suite (NC*)
Spruce Pine Alaskite (NC)

Ordovician, Late*
Devonian, Early(?)*
Geologic Province:
Piedmont-Blue Ridge province*

Areal Extent:

Type Locality:
Vicinity of Spruce Pine, Mitchell Co., NC.

Unit Name History:
Named (Hunter and Mattocks, 1936).
Informal usage of Spruce Pine plutonic group (Rankin and others, 1972).
NC Geol. Survey usage (Brown and others, 1985).
Age modified (Goldsmith and others, 1988).
Revised (Rankin and others, 1991).

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