|Name||Permian marine sedimentary rocks, unit 2 (Northwestern Sierra Nevada)|
|Geologic age||Paleozoic or Mesozoic|
Metamorphic > Metasedimentary > Metaclastic > Phyllite (Amphibolite)Quartz-biotite-muscovite phyllite; locally contains andalusite, staurolite, garnet, and cordierite.
Metamorphic > Metasedimentary > Metaclastic > QuartziteInterbedded with phyllite
Metamorphic > Metasedimentary > Metacarbonate > MarbleLenticular bodies
Sedimentary > Chemical > Chert (Bed)Interbedded with phyllite
Sedimentary > Clastic > Conglomerate (Bed)Interbedded with quartzite; clasts are quartzite or chert
|Comments||Northwestern Sierra Nevada. Consists primarily of phyllite, marble, and quartzite (metasedimentary rocks of the Horseshoe Bend Formation). Assigned a Permian(?) age by Hietanen (1973) based on tentative lithologic correlation with dated rocks to east.|
|Stratigraphic units||Horseshoe Bend Fm. (part)|
Jennings, C.W., Strand, R.G., Rogers, T.H., Boylan, R.T., Moar, R.R., and Switzer, R.A., 1977, Geologic Map of California: California Division of Mines and Geology, Geologic Data Map 2, scale 1:750,000.
Jennings, C.W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p.
Saucedo, G.J., and Wagner, D.L., 1992, Geologic map of the Chico quadrangle, California: California Division of Mines and Geology, Regional Geologic Map Series, Map 7A, scale 1:250,000.
Hietanen, A., 1981, The Feather River area as a part of the Sierra Nevada suture system in California: U.S. Geological Survey Professional Paper 1226-B, 13 p.
Hietanen, A., 1973, Geology of the Pulga and Bucks Lake quadrangles, Butte and Plumas Counties, California: U.S. Geological Survey Professional Paper 731, 66 p.
|Counties||Butte - Plumas|