Mesoperthitic biotite granite (NHKc1b;0)

State	New Hampshire
Name	Mesoperthitic biotite granite
Geologic age	Early Cretaceous
Original map label	Kc1b
Comments	Part of the New England-Quebec igneous province of McHone and Butler (1984). Overall, part of the White Mountain Plutonic-Volcanic Suite - Includes Cretaceous alkalic syenite to granitic to gabbroic plutons, minor volcanic rocks, and lamprophyre dikes of the New England-Quebec igneous province of McHone and Butler (1984); also includes Jurassic granite and syenite and less abundant quartz syenite, diorite, gabbro, nepheline syenite, and volcanic rocks of the White Mountain igneous province of McHone and Butler (1984). Ossipee Mountain Complex of Kingsley (1931) = 122+/-2 K/Ar per NH013. White Mountain Plutoni-Volcanic Suite: Green Mountain pluton = 111+/-3 K/Ar per NH013. Merrymeeting Lake intrusive rocks = 115+/-10 Rb/Sr per NH022. 117+/-5 K/Ar per NH013.
Primary rock type	granite
Secondary rock type
Other rock types
Lithologic constituents	Major Igneous > Plutonic > Granitic > Granite (Pluton)mesoperthitic biotite granite
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. [http://pubs.er.usgs.gov/publication/ds215]
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. McHone, J.G., and Butler, J.R., 1984, Mesozoic igneous provinces of New England and the opening of the North Atlantic Ocean: Geological Society of America Bulletin, v. 95, p. 757-765. Kingsley, Louise, 1931, Cauldron subsidence of the Ossipee Mountains: American Journal of Science, v. 12, p. 134-167. Foland, K.A., and Faul, Henry, 1977, Ages of the White Mountain intrusives, New Hampshire, Vermont and Maine, U.S.A.: American Journal of Science, v. 277, p. 888-904. Foland, K.A., Quinn, A.W., and Giletti, B.J., 1971, K-Ar and Rb-Sr Jurassic and Cretaceous ages for intrusives of the White Mountain magma series, northern New England: American Journal of Science, v. 270, p. 321-330.
Geographic coverage	Belknap - Carroll - Rockingham - Strafford