Pink equigranular biotite granite

Found in Woodsville and Whitefield quadrangles and in small intrusive units in northern and southeastern New Hampshire.
State New Hampshire
Name Pink equigranular biotite granite
Geologic age Late Devonian
Lithologic constituents
Igneous > Plutonic > Granitic > Granite (Pluton)pink equigranular biotite 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. French Pond Granite = 365+/-4 U/Pb per NH015.

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.

Aleinikoff, J.N., and Moench, R.H., 1987, U-Pb geochronology and Pb isotopic sytematics of plutonic rocks in northern New Hampshire; ensimatic vs. ensialic sources [abs.]: Geological Society of America Abstracts with Programs, v. 19, p. 1-2.

NGMDB product
Counties Coos - Grafton - Rockingham