Mesoperthitic biotite granite (NHKc1b;0)

State	New Hampshire
Name	Mesoperthitic biotite granite
Geologic age	Early Cretaceous
Lithologic constituents	Major Igneous > Plutonic > Granitic > Granite (Pluton)mesoperthitic biotite granite
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.
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 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.
NGMDB product	NGMDB product page for 37338
Counties	Belknap - Carroll - Rockingham - Strafford

State

New Hampshire

Name

Mesoperthitic biotite granite

Geologic age

Early Cretaceous

Lithologic constituents

Major

Igneous > Plutonic > Granitic > Granite (Pluton)mesoperthitic biotite granite

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.

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

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.

NGMDB product

NGMDB product page for 37338

Counties

Belknap - Carroll - Rockingham - Strafford