Gabbro and ultramafic rocks associated with granitic plutons (ORKJgu;0)

Gabbro and ultramafic rocks associated with granitic plutons

Predominantly hornblende gabbro, gabbro, and olivine gabbro, but includes pyroxenite, hornblende pyroxene, and minor peridotite, dunite, and serpentinite (Smith and others, 1982)

State	Oregon
Name	Gabbro and ultramafic rocks associated with granitic plutons
Geologic age	Late Jurassic and Early Cretaceous
Lithologic constituents	Major Igneous > Plutonic > Gabbroic > Gabbro (Pluton) Minor Igneous > Plutonic > Ultramafic > Pyroxenite (Pluton) Incidental Metamorphic > Metaigneous > Serpentinite Igneous > Plutonic > Ultramafic > Peridotite (Pluton)
References	Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.
NGMDB product	NGMDB product page for 16259
Counties	Jackson - Josephine

Gabbro and ultramafic rocks associated with granitic plutons

Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.