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Geologic Units: Starr
Map showing publication footprint
  • Usage in publication:
    • Starr Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Fanglomerate
    • Sandstone
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Morton, P.K., Miller, R.V., and Fife, D.L., 1973, Geologic map of Orange County, California, IN Preliminary geo-environmental maps of Orange County, California: California Division of Mines and Geology Preliminary Report, no. 15, (incl. geologic map, scale 1:48,000)


Summary:

[Probably named for Starr Ranch sec.19 T6S R6W, Santiago Peak 7.5' quad, Orange Co, CA]. Shown on geologic map east of Plano Trabuco, Orange Co, CA. Is member of Williams Formation. Described as nonmarine, yellowish-brown deeply weathered fanglomerate and massive conglomeratic micaceous sandstone. Overlies Ladd Formation. [Underlies] Schulz Ranch and Pleasants Sandstone Members of Williams Formation. Age given as Late Cretaceous.

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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