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Map showing publication footprint
  • Usage in publication:
    • Mount Soledad Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Conglomerate
    • Sandstone
  • 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:

Unit is named after Mount Soledad as lowermost formation of La Jolla Group. Type section designated as being at head of natural amphitheater 400 m west of intersection of HWY I-5 and Ardath Road, San Diego Co., CA. Consists predominantly of cobble conglomerate which is interbedded with medium-grained sandstone in the upper part of unit. Is 70 m thick at type section. Unconformably overlies Cabrillo Formation; conformably underlies Ardath Shale (new) of La Jolla Group. Age is considered early(?) and middle Eocene based on stratigraphic relationship with Ardath Shale.

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


Map showing publication footprint
  • Usage in publication:
    • Mount Soledad Formation
  • Modifications:
    • Biostratigraphic dating
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Givens, C.R., and Kennedy, M.P., 1979, Eocene molluscan stages and their correlation, San Diego area, California, IN Abbott, P.L., ed., Eocene depositional systems, San Diego, California; [field trip no. 18]: Geological Society of America Field Trip Guidebook, Joint Fall field trip of Society of Economic Paleontologists and Mineralogists, Pacific Section, and Geological Society of America, [92nd] annual meeting, San Diego, CA, November 8-9, 1979, no. 18, p. 81-95.


Summary:

Mount Soledad Formation at the base of Eocene section may locally include strata of "Capay" age but faunal evidence is lacking. Few fossils from Mount Soledad Formation with locations are listed indicating "Domengine Stage". Correlation figure shows Mount Soledad Formation may be as old as early(?) Eocene and is definitely middle Eocene age.

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


Map showing publication footprint
  • Usage in publication:
    • Mount Soledad Formation*
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Peninsular Ranges province
Publication:

Frederiksen, N.O., 1991, Age determinations for Eocene formations of the San Diego, California, area, based on pollen data, IN Abbott, P.L., and May, J.A., eds., Eocene geologic history, San Diego region: Society of Economic Paleontologists and Mineralogists, Pacific Section, Field Trip Guidebook, book 68, p. 201-215.


Summary:

Age of the Mount Soledad Formation is revised from early(?) and middle Eocene to: middle Eocene on the basis of fossils [pollen and spores]. This agrees with age determinations based on planktic foraminifers (Steineck and others, 1972).

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


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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 ( ).

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