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National Geologic Map Database
Geologic Unit: Rosario
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Map showing publication footprint
  • Usage in publication:
    • Rosario Group*
  • Modifications:
    • Revised
    • Adopted
    • Areal extent
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Kennedy, M.P., and Moore, G.W., 1971, Stratigraphic relations of Upper Cretaceous and Eocene formations, San Diego coastal area, California: American Association of Petroleum Geologists Bulletin, v. 55, no. 5, p. 709-722. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Rosario Formation named and type section designated as exposures south of Rio del Rosario near town of El Rosario, west coast of Baja, CA 300 km south of international boundary (Beal, 1924). Rosario Formation is raised in rank to Rosario Group in southwestern CA, and encompasses same stratigraphic interval as in type area and includes (ascending): Lusardi, Point Loma (new) and Cabrillo (new) Formations. Shown on geologic index map of bedrock geology of San Diego coastal area. Map explanation indicates Group overlies Jurassic and Cretaceous metamorphic and granitic rocks. Underlies La Jolla Group. Age is 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).