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Granite, gneiss, and schist, undivided

Granite, gneiss, and schist, undivided - Plutonic and metamorphic rocks of probable Proterozoic Z age. May include plutonic and volcanic rocks of Paleozoic or younger age.
StateMassachusetts
NameGranite, gneiss, and schist, undivided
Geologic ageProterozoic Z
Original map labelZgg
CommentsPart of Milford-Dedham Zone (Tertiary and Older Rocks)
Primary rock typegranite
Secondary rock typegneiss
Other rock typesschist
Lithologic constituents
Map references
Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon at Boston College in 1998.
Unit references
Zen, E-An (ed.), Goldsmith, R. (comp.), Ratcliffe, N.M. (comp.), Robinson, P. (comp.), Stanley, R.S. (comp.), Hatch, N.L., Jr., Shride, A.F., Weed, E.G.A., Wones, D.R., 1983, Bedrock Geologic Map of Massachusetts: U.S. Geological Survey, Reston, VA, scale 1: 250,000.
Geographic coverageBarnstable - Dukes - Plymouth

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