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Geologic Unit: Virginia
Map showing publication footprint
  • Usage in publication:
    • Virginia quartz-hypersthene norite
  • Modifications:
    • Named
  • Dominant lithology:
    • Gabbro
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Dudley, P.H., 1935, Geology of a portion of the Perris block, southern California: California Journal of Mines and Geology, v. 31, no. 4, p. 487-506, (incl. geologic map, scale approx. 1:100,000)


Summary:

Named for occurrence near Old Virginia Mine, Perris-Elsinore area, Riverside County, California. Extends westward into eastern part of the Gavilan. Occurs on southwestern edge of Perris fault block. Quartz-hypersthene norite has peculiar dark color and weathers to a bronze cast. Texture is coarse hypautomorphic granular. Age is Late Jurassic(?).

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


Map showing publication footprint
  • Usage in publication:
    • Virginia quartz norite
  • Modifications:
    • Redescribed
    • Age modified
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Miller, W.J., 1946, Crystalline rocks of southern California: Geological Society of America Bulletin, v. 57, no. 5, p. 457-542.


Summary:

Pg. 481, Table 4. Virginia quartz norite. The Virginia quartz-hypersthene norite of Dudley (1935) is referred to as Virginia quartz norite as part of plutonic series in Perris Block. Succession (approximate oldest to youngest) includes: Gavilan Peak gabbro, Virginia quartz norite, Perris and Estelle quartz diorite (Val Verde tonalite), Lakeview quartz diorite, Steele Valley granodiorite, Cajalco quartz monzonite, and La Posta quartz diorite. Age of series is late Mesozoic.

Source: US geologic names lexicon (USGS Bull. 1200, p. 4089); supplemental information from GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Virginia quartz-hypersthene norite
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Larsen, E.S., Jr., 1948, Batholith and associated rocks of Corona, Elsinore, and San Luis Rey quadrangles, southern California: Geological Society of America Memoir, 29, 182 p., (incl. geologic map, scale 1:125,000)


Summary:

In Elsinore 30-min quadrangle, Virginia quartz-hypersthene norite of Dudley (1935) is variety of San Marcos gabbro as defined by F.S. Miller (1937, GSA Bull. v.48 p.1397-1426).

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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