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National Geologic Map Database

Geologic Unit: Hoosac

Usage:

Hoosac Formation (CT*,MA*,VT*)
Hoosac Schist (CT*,MA*)


Subunits:

Bull Hill Member (VT), Turkey Mountain Member (VT*), Plymouth Member (VT).


Geologic age:

Precambrian*
Proterozoic, Late*
Cambrian, Early*


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

Exposures on Hoosac Mountain, Berkshire Co., northern MA (Emerson, 1892, unpub. report).


AAPG geologic province:

New England province*


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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"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 ([ ]).