Sheet 2 of 3 IN:
Zen, E-an, Goldsmith, Richard, Ratcliffe, N.M., Robinson, Peter, Stanley, R.S., Hatch, N.L., Shride, A.F., Weed, E.G.A. and Wones, D.R., 1983, Bedrock geologic map of Massachusetts: U.S. Geological Survey, scale 1:250000.
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