U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Worcester

Usage:

Worcester Formation (MA*)
Worcester Phyllite (MA)


Geologic age:

Devonian, Early*
Silurian*


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

Exposures at Worcester, eastern MA, and over broad area in north part of Worcester Co. (Emerson, 1889).


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 ([ ]).