USGS Visual Identifier
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Geologic Unit: Austin Glen

Austin Glen Member of Normanskill Formation (NY)
Austin Glen Formation (NY)
Austin Glen Formation of Normanskill Group (NY)
Austin Glen Graywacke Member of Walloomsac Formation (NY,VT)
Austin Glen Graywacke (NY*)

Ordovician, Middle*
Geologic Province:
Appalachian basin*
New England province*
Areal Extent:

Type Locality:
Named from Austin Glen in Catskill Valley near village of Catskill, Greene Co., east-central NY. Exposed in creek bed where it forms a north-south striking anticline (Ruedemann, 1942b).

Unit Name History:
[Please note: Ruedemann (1942a, 1942b) and Potter (1971) have yet to be added from the GNC index card files. Until then, feel free to contact us if you would like complete bibliographic citations.]
First used (Ruedemann, 1942a).
Name proposed for member of Normanskill Formation (Ruedemann, 1942b).
Extended into VT as member of Walloomsac Formation (Potter, 1971).
Overview (Zen and others, 1983).
Used as member of Normanskill (Sanders, 1995).

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