|Name||Rhyolite and fine-grained granite|
Igneous > Plutonic > Granitic > Granite
Igneous > Volcanic > Felsic-volcanic > Rhyolite
Igneous > Plutonicminor intrusive rocks; also some aphanitic gray, black, or tan quartz-feldspar porphyry.
Igneous > Volcanic (Pyroclastic)includes some ignimbritic caldera-fill and minor intrusive rocks
|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).|
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.
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.
|Counties||Belknap - Carroll - Strafford|