National Geologic Map Database
General Information
- Title: Bedrock geologic map of the Pepperell, Shirley, Townsend quadrangles, and part of the Ayer quadrangle, Massachusetts and New Hampshire
- Author(s): Robinson, G.R.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Miscellaneous Field Studies Map MF-957
- Publication Date: 1978
- Map Scale: 1:24,000
- Cross Section: Yes
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* See base map disclaimer below
Geologic units referred to in Geolex
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.