Pyroxene Syenite

Gray- to buff- or tan-weathering, greenish-gray, medium- to coarse-grained, massive, indistinctly foliated syenite composed of mesoperthite to microantiperthite, oligoclase and clinopyroxene. Contains sparse amounts of quartz, titanite, magnetite, and trace amounts of pyrite.
State New Jersey
Name Pyroxene Syenite
Geologic age Middle Proterozoic
Lithologic constituents
Major
Igneous > Plutonic > Syenitic > SyeniteGray- to buff- or tan-weathering, greenish-gray, medium- to coarse-grained, massive, indistinctly foliated syenite composed of mesoperthite to microantiperthite, oligoclase and clinopyroxene. Contains sparse amounts of quartz, titanite, magnetite, and trace amounts of pyrite.
Comments Lake Hopatcong Intrusive Suite (Middle Proterozoic) (Drake and Volkert, 1991)
References
NGMDB product
Counties Hunterdon - Morris - Sussex - Warren