GEOLEX

Summary of Citation: Bedford Canyon

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)

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Named	Peninsular Ranges province	Slate Argillite

Summary:
Named for exposures in Bedford Canyon, Santa Ana Mtns., Riverside Co., CA. Formerly called Santa Ana limestone (Smith, 1898) and Santa Ana metamorphic strata (Merrill, 1914). Is composed of mildly metamorphosed slates and argillites with some quartzites and lenses of limestone. Is probably 20,000 ft. thick. Unconformably underlies Santiago Peak Volcanics (new). Intruded by granitic rocks. Assigned Triassic age based on fossils (Smith, 1898).

Summary of Citation: Bedford Canyon

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

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
	Peninsular Ranges province

Summary:
Intruded by batholithic rocks of early Late Cretaceous age.

Summary of Citation: Bedford Canyon

Publication:
Engel, Rene, 1959, Geology of the Lake Elsinore quadrangle,
   California: California Division of Mines and Geology Bulletin,
   no. 146, p. 9-58

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Mapped	Peninsular Ranges province

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

Summary of Citation: Bedford Canyon

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

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified Biostratigraphic dating	Peninsular Ranges province

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.

Summary of Citation: Bedford Canyon

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

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified Biostratigraphic dating	Peninsular Ranges province

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).

Summary of Citation: Bedford Canyon

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

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified Biostratigraphic dating	Peninsular Ranges province

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).

Summary of Citation: Bedford Canyon

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 and Geology Bulletin, no. 178, 120 p.

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Mapped	Peninsular Ranges province

Summary:
Mapped in Corona South 7.5' quad., Riverside and Orange Cos., CA.

Summary of Citation: Bedford Canyon

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

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified Biostratigraphic dating	Peninsular Ranges province

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).

Summary of Citation: Bedford Canyon

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.

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Mapped	Peninsular Ranges province

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

Summary of Citation: Bedford Canyon

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

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified Biostratigraphic dating	Peninsular Ranges province

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

Summary of Citation: Bedford Canyon

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.

Usage in Publication:
Bedford Canyon formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	Peninsular Ranges province

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

Summary of Citation: Bedford Canyon

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.]

Usage in Publication:
Bedford Canyon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
	Peninsular Ranges province

Summary:
French Valley Formation may overlie Bedford Canyon Formation.

Summary of Citation: Bedford Canyon

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

Usage in Publication:
Bedford Canyon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified	Peninsular Ranges province

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

Summary of Citation: Bedford Canyon

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, 2, Sacramento, CA, April 29,
   1978, p. 385-396

Usage in Publication:
Bedford Canyon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified Isotopic dating	Peninsular Ranges province

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.

Summary of Citation: Bedford Canyon

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.

Usage in Publication:
Bedford Canyon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified Biostratigraphic dating	Peninsular Ranges province

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

Summary of Citation: Bedford Canyon

Publication:
Schoellhamer, J.E., Vedder, J.G., Yerkes, R.F. and Kinney, D.M.,
   1981, Geology of the northern Santa Ana Mountains, 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)

Usage in Publication:
Bedford Canyon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Mapped	Peninsular Ranges province

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.

Summary of Citation: Bedford Canyon

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)

Usage in Publication:
Bedford Canyon Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Mapped	Peninsular Ranges province

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