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National Geologic Map Database
Geologic Unit: Antoine Canyon
Map showing publication footprint
  • Usage in publication:
    • Antoine Canyon Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Quartzite
  • AAPG geologic province:
    • Sierra Nevada province
Publication:

Harwood, D.S., Fisher, G.R., Jr., and Waugh, B.J., 1995, Geologic map of the Duncan Peak and southern part of the Cisco Grove 7.5' quadrangles, Placer and Nevada Counties, California: U.S. Geological Survey Miscellaneous Investigations Series Map, I-2341, 1 sheet, 12 p., scale 1:24,000


Summary:

Antoine Canyon Formation is named for exposures in Antoine Canyon (type locality: sec.13, T15N R12E, Duncan Peak 7.5' quad), Placer Co, CA. Reference localities are found in Manilia Canyon and Screwauger Canyon (sec.18, T15N R13E). Consists of thick-bedded, parallel-laminated, generally fine-grained quartzite with minor thin beds of black pelite. Total thickness is unknown; thickness at type locality is at least 2700 m. Base of unit is not exposed; locally overlain in much of map area by the Screwauger Breccia (new) and the Big Valley Bluff Formation (new). Age is Ordovician(?) to Devonian(?) based on regional stratigraphic relationships.

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 ([ ]).