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National Geologic Map Database

NGMDB

Geologic Unit: Nashoba

Usage:

Nashoba Formation (MA*)


Subunits:

Boxford Member, Bellows Hill Member, Billerica Schist Member, Spencer Brook Member, Tophet Swamp Gneiss Member, Nashoba Brook Member, Nagog Pond Gneiss Member, Fort Pond Member, Long Pond Gneiss Member, Beaver Brook Member.


Geologic age:

Precambrian*
Proterozoic, Late*
Ordovician*


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

Nashoba Brook, Maynard and Westford quadrangles, northeastern MA (Hansen, 1956).


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 16:21:13 2014