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Map showing publication footprint
  • Usage in publication:
    • Cuyamaca basic intrusive
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Gabbro
    • Norite
    • Diorite
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Hudson, F.S., 1922, Geology of the Cuyamaca region of California with special reference to the origin of nickeliferous pyrrhotite: University of California Publications in Geological Sciences, v. 13, no. 6, p. 175-252.


Summary:

Pg. 181, 192-207, map. Cuyamaca basic intrusive. Chiefly gabbros, norites, and basic diorites. Three units mapped (1) hypersthene diorite, (2) augite diorite, and (3) norite, gabbro, etc. Cuts Julian schist and Stonewall quartz diorite. Age is probably pre-Cretaceous.
[Type locality not designated.] Named from the three peaks of Cuyamaca Mountains [in T. 13 and 14 S., R. 3 and 4 E., Julian-Cuyamaca area, southeastern part of Ramona quadrangle and northeastern part of Cuyamaca quadrangle], San Diego Co., southern CA.

Source: US geologic names lexicon (USGS Bull. 896, p. 562); supplemental information from GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Cuyamaca gabbro*
  • Modifications:
    • Redescribed
    • Mapped
  • Dominant lithology:
    • Gabbro
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Creasey, S.C., 1946, Geology and nickel mineralization of the Julian-Cuyamaca area, San Diego County, California: California Journal of Mines and Geology, no. 42, p. 15-29.


Summary:

Pg. 18, 19-21, pl. 3. Cuyamaca gabbro. Described in Julian-Cuyamaca area as Cuyamaca gabbro. Youngest rock in area; intrusive into Julian schist and Stonewall quartz diorite. Adopted on recommendation of S.C. Creasey and Wilbur Burbank. Subdivided in field on estimated content of feldspar. Age is considered Mesozoic.
Mapped in Friday Mine-Inspiration Point area.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1023); GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Cuyamaca basic intrusive
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Merriam, Richard, 1946, Igneous and metamorphic rocks of the southwestern part of the Ramona quadrangle, San Diego County, California: Geological Society of America Bulletin, v. 57, no. 3, p. 223-260.


Summary:

Pg. 234. Mapping in Ramona area has shown that Cuyamaca basic intrusive (Hudson, 1922) and San Marcos gabbro (Miller, 1937) are probably the same. In this area, name San Marcos is applied.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1023).


Map showing publication footprint
  • Usage in publication:
    • Cuyamaca gabbro*
  • Modifications:
    • Mapped
    • Age modified
  • Dominant lithology:
    • Gabbro
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Everhart, D.L., 1951, Geology of the Cuyamaca Peak quadrangle, San Diego County, California: California Division of Mines Bulletin, no. 159, p. 51-115, (incl. geologic map, scale 1:62,500)


Summary:

Pg. 66-74, pls. 3, 4, 5. Cuyamaca gabbro. Described in Cuyamaca Peak 15-min quadrangle, San Diego County, California. Writer followed Creasey (1946) in referring to rocks as Cuyamaca gabbro, thereby retaining original locality name given by Hudson, but substituting more appropriate gabbro for term basic intrusive. Considered older than Green Valley tonalite. Age is considered Late Cretaceous (= age of main sequence of batholithic rocks of southern part of California).

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 1023).


Map showing publication footprint
  • Usage in publication:
    • Cuyamaca Gabbro*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Todd, V.R., 1977, Syntectonic batholithic rocks in south-central San Diego County, California, a preliminary report: California Division of Mines and Geology Special Report, no. 129, p. 51-59.


Summary:

Sketch mapped in Cuyamaca 7.5' quad, San Diego Co., CA with vertical sections. Associated with granodiorite-tonalite of Cuyamaca Reservoir, quartz monzonite of Chiquito Park and Pine Valley, and diorite-gabbro of East Mesa (all of Cretaceous age).

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


Map showing publication footprint
  • Usage in publication:
    • Cuyamaca Gabbro*
  • Modifications:
    • Age modified
    • Areal extent
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Todd, V.R., Learned, R.E., Peters, T.J., and Mayerle, R.T., 1983, Mineral resources potential maps of the Sill Hill, Hauser, and Caliente roadless areas, San Diego County, California: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1547-A, 1 sheet, 12 p., scale 1:62,500


Summary:

Sketch mapped in the Sill Hill and Hauser roadless areas. Assigned Early Cretaceous age [based on intrusive relationships with granitic rocks of Lower Cretaceous age.]

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


Map showing publication footprint
  • Usage in publication:
    • Cuyamaca Gabbro*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Todd, V.R., and Morton, D.M., 1986, Peninsular Ranges batholith; Field trip no. 9, IN Ehlig, P.L., compiler, Guidebook [for] southern California field trips: Geological Society of America, Cordilleran Section, Guidebook for Field Trips, 82nd annual meeting, Los Angeles, CA, March 25-28, 1986, p. 13-30.


Summary:

Extended into and sketch mapped in El Cajon Mountain 7.5' quad and Cuyamaca Mtns. gabbro-granitoid complex area, San Diego Co., CA.

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


Map showing publication footprint
  • Usage in publication:
    • Cuyamaca Gabbro*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Todd, V.R., Lee, G.K., Oliver, H.W., Causey, J.D., and Schmauch, S.W., 1988, Mineral resources of the Southern Otay Mountain and Western Otay Mountain Wilderness Study Areas, San Diego County, California, IN Mineral resources of wilderness study areas; southern California and California Desert Conservation Area: U.S. Geological Survey Bulletin, 1711-E, p. E1-E18.


Summary:

Geographically extended on map figure to Southern Otay Mountain wilderness area. Assigned Cretaceous age.

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


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

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