Gray augite-hornblende-biotite monzonite

Gray augite-hornblende-biotite monzonite.
State New Hampshire
Name Gray augite-hornblende-biotite monzonite
Geologic age Cretaceous
Lithologic constituents
Igneous > Plutonic > Syenitic > Monzonite (Pluton)gray augite-hornblende-biotite monzonite
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). White Mountain Plutonic-Volcanic Suite: Mount Pawtuckaway intrusive rocks = 122+/-2 K/Ar per NH022. 128+/-2 Rb/Sr, biotite per NH041.

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.

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.

Eby, G.N., 1985, Geology and geochemistry of the Mount Pawtuckaway ring-dike complex, White Mountain igneous province, New Hampshire [abs.]: Geological Society of America Abstracts with Programs, v. 17, p. 17.

NGMDB product
Counties Grafton - Rockingham