Sedimentary rocks, partly metamorphosed

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
State Oregon
Name Sedimentary rocks, partly metamorphosed
Geologic age Paleozoic to Jurassic(?)
Lithologic constituents
Sedimentary > Clastic > Mudstone
Sedimentary > Clastic > Sandstone > Graywacke
Sedimentary > Chemical > Chert
Metamorphic > Metasedimentary > Metacarbonate > Marble
Igneous > Volcanic (Pyroclastic)
Sedimentary > Clastic > Conglomerate
Comments Most of unit is mapped as melange considered part of the Rattlesnake Creek Terrane by Irwin (1994)

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

NGMDB product
Counties Jackson - Josephine