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Sedimentary rocks, partly metamorphosed (Triassic and Paleozoic)

Poorly bedded argillite, chert, phyllite, phyllitic quartzite, calc-phyllite, impure limestone, and marble. In places rocks are strongly foliated. In Klamath Mountains of southwest Oregon, includes shale, mudstone, volcaniclastic sandstone, graywacke, conglomerate, tuff, and minor radiolarian chert and marble of the Applegate Group
StateOregon
NameSedimentary rocks, partly metamorphosed (Triassic and Paleozoic)
Geologic agePaleozoic to Jurassic(?)
Original map labelTRPzs
CommentsMost of unit is mapped as melange considered part of the Rattlesnake Creek Terrane by Irwin (1994)
Primary rock typemudstone
Secondary rock typegraywacke
Other rock typesconglomerate; chert; marble; tuff
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone > Graywacke
Sedimentary > Clastic > Mudstone
Incidental
Igneous > Volcanic (Pyroclastic)
Sedimentary > Chemical > Chert
Metamorphic > Marble
Sedimentary > Clastic > Conglomerate
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.
Geographic coverageJackson - Josephine

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORTRPZs1;0
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