USGS Visual Identifier
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Geologic Unit: Allingtown

Allingtown Metadiabase (CT*)
Allingtown Metavolcanics (CT*)

Ordovician, Middle(?)*
Geologic Province:
New England province*
Areal Extent:

Type Locality:
Community of Allingtown [spelled Allington on recent topo maps] just southwest of city of New Haven on U.S. Highway 1, south-central CT (Fritts, 1965).

Unit Name History:
First published use (Fritts, 1965a).
Formally proposed as Allingtown Metadiabase (Fritts, 1965b).
Revised to Allingtown Volcanics (Burger, 1967).
Revised to Allingtown Metavolcanics; Age modified (Rogers, 1985).

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