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Trondhjemite and abundant pegmatite

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Gray and fine-grained; possibly belonging to the Sebago batholith.
State New Hampshire
Name Trondhjemite and abundant pegmatite
Geologic age Devonian - Mississippian
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite (Batholith)Gray and fine-grained; possibly belonging to the Sebago batholith.
Igneous > Plutonic > Granitic > Tonalite > Trondhjemite (Batholith)Gray and fine-grained; possibly belonging to the Sebago batholith.
References

Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock Geologic Map of New Hampshire: Reston, VA, U.S. Geological Survey Special Map, 2 sheets, scale 1:250,000.

https://ngmdb.usgs.gov/Prodesc/proddesc_37338.htm
NGMDB product
Counties Carroll