USGS Visual Identifier
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Geologic Unit: Stacy

Stacy Dolomite Member of Gatesburg Formation (PA*)
Stacy Member of Gatesburg Formation (PA)

Cambrian, Late*
Geologic Province:
Appalachian basin*
Areal Extent:

Type Locality:
Exposures on summit and west side of Stacy Hill, a knob 4 mi west and south of Williamsburg, Blair Co., PA (Butts, 1918).

Unit Name History:
Named (Butts, 1918). Overview (Wilson, 1952). Overview (Berg and others, 1980).

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