Two-mica granite of northern and southeastern New Hampshire

Similar to Concord Granite.
State New Hampshire
Name Two-mica granite of northern and southeastern New Hampshire
Geologic age Early - Late Devonian
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granite (Pluton)two-mica granite
Comments Part of the New Hampshire Plutonic Suite (Late to Early Devonian) - Includes synkinematic and postkinematic granitoids related to the Acadian orogeny. Ages range from 410 to 365 Ma. Mooselookmeguntic batholith = 371+/-6 Rb/Sr per NH016.
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

Moench, R.H., and Zartman, R.E., 1976, Chronology and styles of multiple deformation, plutonism, and polymetamorphism in the Merrimack synclinorium of western Maine, in Lions, P.C., and Brownlow, A.H., eds., Studies in New England geology; a memoir in honor of C. Wroe Wolfe: Geological Society of America Memoir 146, p. 203-238.

NGMDB product
Counties Carroll - Coos - Grafton - Hillsborough - Rockingham - Strafford