USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Mineral Resources > Online Spatial Data > Geology > by state > Oregon

Granite and diorite (Jurassic and Triassic)

Felsic to intermediate, granitoid intrusive rocks. Includes Jurassic muscovite granodiorite, hornblende gabbro, tonalite, and quartz diorite of southwest Oregon (Smith and others, 1982)
StateOregon
NameGranite and diorite (Jurassic and Triassic)
Geologic ageTriassic and Jurassic
Original map labelJTRgd
CommentsIncludes part of the Chetco River complex of Hotz (1971).
Primary rock typetonalite
Secondary rock typequartz diorite
Other rock typesgranodiorite; gabbro; diorite
Lithologic constituents
Major
Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)
Igneous > Plutonic > Granitic > Tonalite (Pluton)
Minor
Igneous > Plutonic > Dioritic > Diorite (Pluton)
Igneous > Plutonic > Granitic > Granodiorite (Pluton)
Incidental
Igneous > Plutonic > Gabbroic > Gabbro (Pluton)
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.
Irwin, W.P., 1994, Geologic map of the Klamath Mountains, California and Oregon: U.S. Geological Survey Miscellaneous Investigations Series Map I-2148, scale 1:500,000.
Hotz, P.E., 1971, Plutonic rocks of the Klamath Mountains, California and Oregon: U.S. Geological Survey Professional Paper 684-B, p. B1-B20.
Geographic coverageCoos - Curry - Douglas - Josephine

Show this information as [XML]

AccessibilityFOIAPrivacyPolicies and Notices

Take Pride in America logoUSA.gov logoU.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORJTRgd1;0
Page Contact Information: Peter Schweitzer