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Map showing publication footprint
  • Usage in publication:
    • Oso Canyon Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Fanglomerate
    • Conglomerate
    • Sandstone
    • Siltstone
  • AAPG geologic province:
    • Mojave basin
Publication:

Dibblee, T.W., Jr., 1967, Areal geology of the western Mojave Desert, California: U.S. Geological Survey Professional Paper, 522, 153 p., (incl. geologic map, scale 1:125,000)


Summary:

Named Oso Canyon Formation. Rocks were formerly mapped as Santa Margarita Formation. Consists of coarse fluviatile sedimentary sequence of beds and intergradations of fanglomerate, conglomerate, sandstone, and siltstone. Maximum thickness is about 5,500 feet. Southwestward, the lower contact is gradational with the underlying Quail Lake Formation (new). Northeastward, Oso unconformably overlies Neenach Volcanic Formation (new) and unconformably overlies Mesozoic granite. Unconformably underlies Meeke Mine Formation (new). Age is late Miocene, based on relationship to Quail Lake Formation.
Named from Oso Canyon. Type section: from contact with Quail Formation 2/3 mi north of west end of Quail Lake, along line N. 20 deg. E. for 2 mi across Oso Canyon to contact with overlying Meeke Mine Formation [La Liebre Ranch and Lebec 7.5-min quadrangles, Los Angeles Co., CA].

Source: Modified from GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Oso Canyon Formation†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Mojave basin
Publication:

Sims, J.D., 1993, Chronology of displacement on the San Andreas Fault in central California; evidence from reversed positions of exotic rock bodies near Parkfield, California, 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. 231-256.


Summary:

Oso Canyon Formation of Dibblee (1967) is abandoned. Its rocks are here reassigned to the Santa Margarita Formation.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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