The Bedrock Geologic Map of Massachusetts
The 1:250,000 scale Bedrock Geologic
Map of Massachusetts, published by the USGS in 1983, shows the distribution
of the different rock units, faults, and other features that make
up the bedrock of Massachusetts. It was compiled from published 1:24,000-scale
maps., unpublished data, and field reconnaisance by the authors. Many
areas of the state, however, have yet to be mapped thoroughly at 1:24,000
database of the map, that can be downloaded in a variety of
formats, is available from
the USGS here.
A GIS version of the map can be obtained
A scanned version of this map is available in ESRI MrSID
format from the USGS here.
A two-volume text, The Bedrock
Geology of Massachusetts, published in 1991, accompanies
the map and can be purchased through the Earth
Science Information Office at U-Mass, Amherst, or through the
USGS by calling 1-888-ASK-USGS. The publication is catalogued as
U.S. Geological Survey Professional Paper 1366 A-D (western
Mass.) and 1366 E-J (eastern Mass.)
- An alternative
interpretation of the geology of the eastern part of the state is
portrayed in USGS
Open File Report 77-285: Preliminary compilation of the bedrock
geology of the land area of the Boston 2 degree sheet, Massachusetts,
Connecticut, Rhode Island and New Hampshire.
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webpage last updated 7/2006