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National Geologic Map Database

NGMDB

Geologic Unit: Exeter

Usage:

Exeter Diorite (NH*)
Exeter Diorite in /Hillsboro plutonic series [informal] (NH)

[When referring to the Hillsboro plutonic series, please use informally. The practice of employing "Series" for lithostratigraphic or lithodemic nomenclature is now regarded as improper (ACSN, 1961, 1970; NACSN, 1983, 2005). The term "Series" is applied formally only to chronostratigraphic units.]


Geologic age:

Early Devonian*


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

Exposures along Boston and Maine RR, between MA and ME, especially between towns of Exeter and Dover, Rockingham Co., southeastern NH (Hitchcock, 1870).


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: Tue Jun 3 16:08:54 2014