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Trondhjemite and abundant pegmatite

Trondhjemite and abundant pegmatite - Gray and fine-grained; possibly belonging to the Sebago batholith.
StateNew Hampshire
NameTrondhjemite and abundant pegmatite
Geologic ageDevonian - Mississippian
Original map labelMD3B
Primary rock typetrondhjemite
Secondary rock typepegmatite
Other rock types
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.
Map references
Bennett, D. S, , Wittkop, C.A., and Dicken, C.L., 2006 , Bedrock Geologic Map of New Hampshire - A Digital Representation of the Lyons and others 1997 map and ancillary files: U.S. Geological Survey Data Series 215, scale 1:250,000, CD-ROM.
Unit 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, 1:250,000, 2 sheets.
Geographic coverageCarroll

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