Large mesoperthitic phenocrysts in a pink to gray quartz syenite porphyry of ""Albany type""

Alkalic amphibole or fayalite may be present. Part of Ossipee Mountain Complex of Kingsley (1931).
State New Hampshire
Name Large mesoperthitic phenocrysts in a pink to gray quartz syenite porphyry of ""Albany type""
Geologic age Cretaceous
Lithologic constituents
Major
Igneous > Plutonic > Syenitic > Quartz-syenite (Pluton)Large mesoperthitic phenocrysts in a pink to gray quartz syenite porphyry of ""Albany type"" - Alkalic amphibole or fayalite may be present.
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). Mount Tripyramid intrusive rocks (syenites and some gabbro) of White Mountain Plutonic-Volcanic Suite, 112+/-5 K/Ar, hornblende (Western Geophysical Co., in NH024).
References
NGMDB product
Counties Carroll - Grafton