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National Geologic Map Database

NGMDB

Geologic Unit: Andover

Usage:

Andover Granite (MA*)


Geologic age:

Ordovician or Silurian*


Type section, locality, area and/or origin of name:

Occupies large area around Andover, Essex Co., northeastern MA (Clapp, 1910; Emerson, 1917).


AAPG geologic province:

New England province*


NGMDB

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).

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Page Last Modified: Thu Sep 25 18:04:38 2014