Oligocene nonmarine rocks, unit 2 (Central and Southern California)

Sandstone, shale, and conglomerate; in part Miocene and Eocene.
State California
Name Oligocene nonmarine rocks, unit 2 (Central and Southern California)
Geologic age middle Eocene to early Miocene
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)Feldspathic to arkosic
Sedimentary > Clastic > Conglomerate (Bed)Polymict clasts include granitic, metamorphic, metavolcanic, and quartzitic rocks
Minor
Sedimentary > Clastic > Mixed-clastic > Siltstone-mudstone (Bed)Commonly forms thin interbeds with sandstone
Incidental
Sedimentary > Carbonate > Limestone (Bed)Occurs locally in lacustrine sequences
Sedimentary > Chemical > Evaporite (Bed)Occurs locally in lacustrine sequences
Sedimentary > Clastic > Sedimentary-breccia (Bed)
Comments Central and southern California
Stratigraphic units Berry Conglomerate, Lospe Fm., Plush Ranch Fm. (part), Sespe Fm., Simmler Fm., Tecuya Fm. (part), Vasquez Fm. (in large part), Diligencia Fm., Zayante Sandstone
References

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.

Smith, A.R., 1965, Geologic map of California, Olaf P. Jenkins edition, Bakersfield sheet, scale 1:250,000.

Jennings, C.W., and Strand, R.G., 1969, Geologic map of California, Olaf P. Jenkins edition, Los Angeles sheet, scale 1:250,000.

Jennings, C.W., 1967, Geologic map of California, Olaf P. Jenkins edition, Salton Sea sheet, scale 1:250,000.

Rogers, T.H., 1969, Geologic map of California, Olaf P. Jenkins edition, San Bernardino sheet, scale 1:250,000.

Jennings, C.W., 1959, Geologic map of California, Olaf P. Jenkins edition, San Luis Obispo sheet, scale 1:250,000.

Rogers, T.H., 1966, Geologic map of California, Olaf P. Jenkins edition, Santa Ana sheet, scale 1:250,000.

Jennings, C.W., and Strand, R.G., 1959, Geologic map of California, Olaf P. Jenkins edition, Santa Cruz sheet, scale 1:250,000.

Jennings, C.W., 1959, Geologic map of California, Olaf P. Jenkins edition, Santa Maria sheet, scale 1:250,000.

Yerkes, R.F., and Campbell, R.H., 1997, Preliminary geologic map of the west half, Los Angeles 60' x 30' quadrangle: U.S. Geological Survey Open-File Report 97-483, scale 1:100,000.

https://pubs.er.usgs.gov/publication/ofr97483

Tennyson, M.E., 1992, Preliminary geologic map of the Santa Maria 30' x 60' quadrangle, California: U.S. Geological Survey Open-File Report 92-189, 9 p., scale 1:100,000.

https://pubs.er.usgs.gov/publication/ofr92189

Brabb, E.E., Graymer, R.W., and Jones, D.L., 2000, Geologic map and map database of the Palo Alto 30' x 60' quadrangle, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2332, 30 p., scale 1:100,000.

https://pubs.er.usgs.gov/publication/mf2332

Morton, D.M., 1999, Preliminary digital geologic map of the Santa Ana 30' x 60' quadrangle, southern California: U.S. Geological Survey Open-File Report 99-172, scale 1:100,000.

https://pubs.er.usgs.gov/publication/ofr99172

Dibblee, T.W., Jr., 1973, Regional geologic map of San Andreas and related faults in Carrizo Plain, Temblor, Caliente, and La Panza Ranges and vicinity, California: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-757, scale 1:125,000.

https://pubs.er.usgs.gov/publication/i757

Durham, D.L., 1974, Geology of the southern Salinas Valley area, California: U.S. Geological Survey Professional Paper 819, 111 p., scale 1:125,000.

https://pubs.er.usgs.gov/publication/pp819

Clark, J.C., and Rietman, J.D., 1973, Oligocene stratigraphy, tectonics, and paleogeography southwest of the San Andreas fault, Santa Cruz Mountains and Gabilan Range, California Coast Ranges: U.S. Geological Survey Professional Paper 783, 18 p., scale 1:125,000.

https://pubs.er.usgs.gov/publication/pp783

Clark, J.C., 1981, Stratigraphy, paleontology, and geology of the central Santa Cruz Mountains, California Coast Ranges: U.S. Geological Survey Professional Paper 1168, 51 p., scale 1:24,000.

https://pubs.er.usgs.gov/publication/pp1168

Bartow, J.A., 1991, Geologic map of the northwestern Caliente Range, San Luis Obispo County, California: U.S. Geological Survey Miscellaneous Investigations Series Map I-2077, scale 1:36,000.

https://pubs.er.usgs.gov/publication/i2077

Frizzell, V.A., Jr., and Weigand, P.W., 1993, Whole-rock K-Ar ages and geochemical data from middle Cenozoic volcanic rocks, southern California: A test of correlations across the San Andreas fault, in Powell, R.E., Weldon, R.J., II, and Matti, J.C., eds., The San Andreas fault system: Displacement, palinspastic reconstruction, and geologic evolution: Geological Society of America Memoir 178, p. 273-287.

Law, R.D., Eriksson, K., and Davisson, C., 2001, Formation, evolution, and inversion of the middle Tertiary Diligencia basin, Orocopia Mountains, southern California: Geological Society of America Bulletin, v. 113, p. 196-221.

Cole, R.B., and Stanley, R.G., 1995, Middle Tertiary extension recorded by lacustrine fan-delta deposits, Plush Ranch basin, western Transverse Ranges, California: Journal of Sedimentary Research, v. B65, p. 455-468.

Howard, J.L., and Lowry, W.D., 1995, Medial Cenozoic paleogeography of the Los Angeles area, southwestern California, and adjacent parts of the United States, in Fritsche, A.E., ed., Cenozoic paleogeography of the western United States--II: Pacific Section, SEPM (Society for Sedimentary Geology), Book 75, p. 22-41.

Minor, S.A., Kellogg, K.S., Stanley, R.G., Stone, P., Powell, C.L., II, Gurrola, L.D., Selting, A.J., and Brandt, T.R., 2002, Preliminary geologic map of the Santa Barbara coastal plain area, Santa Barbara County, California: U.S. Geological Survey Open-file Report 02-136, scale 1:24,000, 21 p.

https://pubs.er.usgs.gov/publication/ofr2002136

NGMDB product
Counties Kern - Los Angeles - Monterey - Orange - Riverside - San Luis Obispo - Santa Barbara - Santa Cruz - Ventura