Shale, mudstone, and sandstone (Jurassic) (ORJss;0)

State	Oregon
Name	Shale, mudstone, and sandstone (Jurassic)
Geologic age	Late Jurassic
Original map label	Jss
Comments	Unit is correlative with and lithologically similar to the Galice Formation.
Primary rock type	mudstone
Secondary rock type	graywacke
Other rock types	conglomerate; chert
Lithologic constituents	Major Sedimentary > Clastic > Sandstone > Graywacke (Bed) Sedimentary > Clastic > Mudstone (Bed)Commonly metamorphosed to slate or phyllite Incidental Sedimentary > Chemical > Chert (Bed)Present in basal part of unit Sedimentary > Clastic > Conglomerate (Bed)
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. [http://pubs.er.usgs.gov/publication/i2148] Harper, G.D., 1983, A depositional contact between the Galice Formation and a Late Jurassic ophiolite in northwestern California and southwestern Oregon: Oregon Geology, v. 45, no. 1, p. 3-9. Harper, G.D., 1980, Structure and petrology of the Josephine Ophiolite and overlying metasedimentary rocks, northwestern California: Berkeley, Calif., University of California, Ph.D. dissertation, 281 p.
Geographic coverage	Josephine