USGS Visual Identifier
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Geologic Unit: Aziscohos

Aziscohos Formation (ME*,NH*)

Cambrian, Late(?)*
Ordovician, Early(?)*
Geologic Province:
New England province*

Areal Extent:

Type Locality:
Named from exposures along southwest shore of Aziscohos Lake, Oquossoc quadrangle, Oxford Co., west-central ME (Green, 1964).

Unit Name History:
First used (Green, 1959; 1963). Named (Green, 1964).
Areal limits; Overview (Moench and Pankiwskyj, 1988).
Age modified (Moench and others, 1995).
NH State Geol. Map usage; Age modified (Lyons and others, 1997).

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