Geolex — BedfordCanyon publications

National Geologic Map Database
Geolex — Significant Publications

Geologic Unit: Bedford Canyon

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Original reference
Dominant lithology:
- Slate
- Argillite
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:

Pg. 18-22, pl. 1. Bedford Canyon formation. Name proposed for group of mildly metamorphosed slates and argillites with some quartzites and a few thin lenses of limestone. Thickness unknown because base is not exposed and top is a surface of erosion; probably 20,000 feet exposed in Santa Ana Mountains. Unconformably underlies Santiago Peak volcanics (new). [Intruded by granitic rocks.] Smith (1898) used term Santa Ana for a limestone in these slates in western part of Santa Ana Mountains. Merrill (1914) called the slates the Santa Ana metamorphic strata. Since Santa Ana has been used for Tertiary strata in California, name Bedford Canyon is used here. [Age is Triassic, based on fossils (Smith, 1898).]
Named from Bedford Canyon, [Riverside Co.], southern CA, where formation is well exposed. Formation lies west of main batholith (of southern California) and underlies much of Santa Ana Mountains. Regional strike of formation is about N. 30 deg. W., approx. parallel to Santa Ana Mountains and the coast. Region dip is to the east; averages about 50 deg. in Santa Ana Mountains and a little steeper to the east.
[Misprint (US geologic names lexicon, USGS Bull. 1200, p. 268): Bedford Canyon is in Riverside Co., not Orange Co.]

Source: US geologic names lexicon (USGS Bull. 1200, p. 267-268); supplemental information from GNU records (USGS DDS-6; Menlo GNULEX).

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Geochronologic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Larsen, E.S., Jr., Gottfried, David, Jaffe, H.W., and Waring, C.L., 1958, Lead-alpha ages of the Mesozoic batholiths of western North America, IN Investigations of western batholiths: U.S. Geological Survey Bulletin, 1070-B, p. B35-B62.

Summary:

Intruded by batholithic rocks of early Late Cretaceous age.

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Mapped
AAPG geologic province:
- Peninsular Ranges province

Publication:

Engel, Rene, 1959, Geology of the Lake Elsinore quadrangle, California: California Division of Mines Bulletin, no. 146, p. 9-58, (incl. geologic map, scale 1:62,500)

Summary:

Report mapped Bedford Canyon Formation as "Santa Ana Formation" in Lake Elsinore 15' quad, Santa Ana Mtns., CA.

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Age modified
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Gastil, R.G., 1961, The Mesozoic framework, IN Guidebook for field trips; San Diego County-1961: Geological Society of America, Cordilleran Section, Guidebook for Field Trips, 57th annual meeting, San Diego, CA, p. 4-7.

Summary:

Assigned "pre-middle Cretaceous" age to metamorphic and slightly to unmetamorphosed terrane which included Bedford Canyon or Santa Ana Formation, Santiago Peak Volcanics and Alisitos Formation. Fossils in "Bedford Canyon" range from Triassic to Late Jurassic (Cliff Grey, personal communication).

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Mapped
AAPG geologic province:
- Peninsular Ranges province

Publication:

Gray, C.H., Jr., 1961, Geology of the Corona South quadrangle and the Santa Ana Narrows area, Riverside, Orange, and San Bernardino Counties, California: California Division of Mines Bulletin, no. 178, p. 7-58.

Summary:

Mapped in Corona South 7.5-min quadrangle, Riverside and Orange Counties, California.

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Age modified
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Milow, E.D., and Ennis, D.B., 1961, Guide to geologic field trip [no. 2] of southwestern San Diego County [California], IN Guidebook for field trips; San Diego County-1961: Geological Society of America, Cordilleran Section, Guidebook for Field Trips, 57th annual meeting, San Diego, CA, p. 23-43.

Summary:

Is assigned Late Jurassic(?) (Portlandian) age based on bivalves and belemnites (Imlay, 1959) collected in Penasquitos Canyon area from questionable Bedford Canyon Formation rocks.

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Age modified
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Silberling, N.J., Schoellhamer, J.E., Gray, C.H., and Imlay, R.W., 1961, Upper Jurassic fossils from Bedford Canyon Formation, southern California: American Association of Petroleum Geologists Bulletin, v. 45, no. 10, p. 1746-1748. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]

Summary:

Part of unit is assigned Late Jurassic age based on ammonites collected in Ladd Canyon area (Imlay, written communication, 1960) and based on brachiopods collected on the ridge SE of Bedford Canyon (Ager, written communication, 1961).

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Age modified
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Imlay, R.W., 1963, Jurassic fossils from southern California: Journal of Paleontology, v. 37, no. 1, p. 97-107.

Summary:

Part of unit is assigned Middle Jurassic (Callovian) age based on ammonites, collected at Ladd Canyon, Santa Ana Mtns., but Triassic(?) age is also a strong possibility based on brachiopods (Larsen, 1948).

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Mapped
AAPG geologic province:
- Peninsular Ranges province

Publication:

Weber, F.H., Jr., 1963, Geology and mineral resources of San Diego County, California: California Division of Mines and Geology County Report, no. 3, 309 p.

Summary:

Julian Schist and Bedford Canyon Formations are mapped "undivided" but map states that Bedford Canyon is in northwest part of San Diego Co.

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Age modified
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Imlay, R.W., 1964, Middle and upper Jurassic fossils from southern California: Journal of Paleontology, v. 38, no. 3, p. 505-509.

Summary:

Part of unit is assigned a Middle Jurassic (Bajocian) age based on pelecypods collected near head of McBride Canyon, Santa Ana Mtns., CA.

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

Usage in publication:
- Bedford Canyon formation*
Modifications:
- Areal extent
AAPG geologic province:
- Peninsular Ranges province

Publication:

Schwarcz, H.P., 1969, Pre-Cretaceous sedimentation and metamorphism in the Winchester area, northern Peninsular Ranges, California: Geological Society of America Special Paper, 100, 63 p.

Summary:

Extended into and mapped in Winchester area, Riverside Co., CA. Conformably overlies French Valley Formation (new) in area.

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

Usage in publication:
- Bedford Canyon Formation*
AAPG geologic province:
- Peninsular Ranges province

Publication:

Budnik, Roy (compiler), 1972, Field guide to the Peninsular Ranges of southern California: Geological Society of University of California-Los Angeles [Guidebook], [no. 3], [26 p.].

Summary:

French Valley Formation may overlie Bedford Canyon Formation.

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

Usage in publication:
- Bedford Canyon Formation*
Modifications:
- Age modified
AAPG geologic province:
- Peninsular Ranges province

Publication:

Moran, A.I., 1976, Allochthonous carbonate debris in Mesozoic flysch deposits in Santa Ana Mountains, California: American Association of Petroleum Geologists Bulletin, v. 60, no. 11, p. 2038-2043. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]

Summary:

Is lithologically similar to and maybe southern extension of Franciscan Complex. Age here is extended to Early Cretaceous(?) based on stratigraphic relations.

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

Usage in publication:
- Bedford Canyon Formation*
Modifications:
- Age modified
- Geochronologic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Criscione, J.J., Davis, T.E., and Ehlig, Perry, 1978, The age and sedimentation/diagenesis for the Bedford Canyon Formation and the Santa Monica Formation in southern California; a Rb/Sr evaluation, IN Howell, D.G., and McDougall, K.A., eds., Mesozoic paleogeography of the western United States; Pacific Coast paleogeography symposium II: Society of Economic Paleontologists and Mineralogists, Pacific Section, Pacific Coast Paleogeography Symposium, Sacramento, CA, April 29, 1978, 2, p. 385-396.

Summary:

May be separated into Permo-Triassic (228+/-4.3 Ma) and Middle Jurassic (175.8+/-3.2 Ma) informal members based on Rb/Sr ages for fine-grained sediments.

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

Usage in publication:
- Bedford Canyon Formation*
Modifications:
- Age modified
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Imlay, R.W., 1980, Jurassic paleobiogeography of the conterminous United States in its continental setting: U.S. Geological Survey Professional Paper, 1062, 134 p.

Summary:

Assigned Middle Jurassic age (Bajocian, Bathonian, and Callovian) based on fossils now dated Middle Jurassic but formerly considered Triassic.

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

Usage in publication:
- Bedford Canyon Formation*
Modifications:
- Mapped
AAPG geologic province:
- Peninsular Ranges province

Publication:

Morton, P.K. (compiler), and Miller, R.V. (compiler), 1981, Geologic map of Orange County, California, showing mines and mineral deposits: California Division of Mines and Geology Bulletin, no. 204, 1 sheet, (incl. geologic map, scale 1:48,000)

Summary:

Mapped in Orange Co., CA. Assigned Jurassic age.

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

Usage in publication:
- Bedford Canyon Formation*
Modifications:
- Mapped
AAPG geologic province:
- Peninsular Ranges province

Publication:

Schoellhamer, J.E., Vedder, J.G., Yerkes, R.F., and Kinney, D.M., 1981, Geology of the northern Santa Ana Mountains, California, IN Geology of the eastern Los Angeles basin, southern California: U.S. Geological Survey Professional Paper, 420-D, p. D1-D109, (incl. geologic map, scale 1:24,000)

Summary:

Mapped in Black Star Canyon and part of El Toro quads. May be 5500 m thick in Silverado Canyon. Assigned Middle Jurassic age based on earlier reports.

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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