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Intrusive gabbroic rocks (Oligocene and Eocene)

Sills and dikes of basalt, diabase, gabbro, and granophyric gabbro; locally albitized and zeolitized (Snavely and others, 1976a, b)
StateOregon
NameIntrusive gabbroic rocks (Oligocene and Eocene)
Geologic ageEocene to Oligocene
Original map labelTig
Primary rock typegabbro
Secondary rock typediabase
Other rock types
Lithologic constituents
Major
Igneous > Plutonic > Gabbroic > Gabbro (Stock or pipe)
Minor
Igneous > Plutonic > Gabbroic > Gabbro (Dike or sill)
Igneous > Plutonic > Dioritic > Diorite (Stock or pipe)
Incidental
Igneous > Plutonic > Dioritic > Diorite (Dike or sill)
Map references
Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.
Unit references
Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.
Snavely, P.D., Jr., MacLeod, N.S., and Wagner, H.C.,, 1973, Miocene tholeiitic basalts of coastal Oregon and Washington and their relations to coeval basalts of the columbia Plateau: Geological Society of America Bulletin, v. 84, p. 387-424.
Snavely, P.D., Jr., MacLeod, N.S., Wagner, H.C., and Rau, W.W., 1976a, Geologic map of the Cape Foulweather and Euchre Mountain quadrangles, Lincoln County, Oregon: U.S. Geological Survey Miscellaneous Investigations Series Map I-868, scale 1:62,500.
Geographic coverageLincoln

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