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National Geologic Map Database

Geologic Unit: Cram Hill

Usage:

Cram Hill Formation (VT*)


Subunits:

(alphabetical) --all in VT*: Coburn Hill Metabasalt Member, Umbrella Hill Conglomerate Member.


Geologic age:

Early to Middle Ordovician*


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

Exposures on east side of Cram Hill, 3.5 miles south-southeast of Roxbury, Barre quadrangle, Washington Co., VT (Currier and Jahns, 1941).


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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).