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Geologic Units: Palm Canyon
Map showing publication footprint
  • Usage in publication:
    • Palm Canyon Quartz Diorite
  • Modifications:
    • Named
  • Dominant lithology:
    • Quartz diorite
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Brown, A.R., 1981, Structural history of the metamorphic, granitic and cataclastic rocks in the southeastern San Jacinto Mountains, IN Brown, A.R., and Ruff, R.W., eds., Geology of the San Jacinto Mountains: South Coast Geological Society Guidebook, October 10-11, 1981, no. 9, p. 100-138.


Summary:

Named for exposures along sides of Palm Canyon, secs. 25-26, 35-36, R4E, T6S and secs. 1-2, 11-13, R4E,T7S, Idyllwild 15' quad, SE San Jacinto Mtns., Riverside Co., CA. Named first used in thesis (Brown, 1968) and mapped in Brown (1980). Consists of light-gray, moderately-foliated biotite-hornblende quartz diorite. "Mylonitic" variety extends northward to just W of Palm Springs (Dibblee, personal communication, 1968). Concordantly overlies Ken Quartzite (new) of Desert Divide Group (new) on W side of Palm Canyon. Assigned Mesozoic (Cretaceous) age. [no basis given].

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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