Geolex — SantiagoPeak publications

Usage in publication:
- Santiago Peak volcanics*
Modifications:
- Named
Dominant lithology:
- Volcanics
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:

Unit is named for Santiago Peak, Santa Ana Mountains, Corona 30' quad (lat 33 deg 42' 30'N, long 117 deg 32' 10"W), Orange Co., CA. Was formerly called the Black Mountain Volcanics (Hanna, 1926). Has exposed length of 80 mi and width of 10 mi south of La Jolla 30' quad across San Luis Rey 30' quad to Santa Ana River. Is probably 1000's ft thick. Consists of dark green to black andesites, quartz latites with rhyolite forming alternating flows, tuffs, and breccias, all slightly metamorphosed. Unconformably overlies the Bedford Canyon Formation (new). Intruded by fine-grained granodiorites of Late Cretaceous age. Age is Jurassic(?) based on stratigraphic position.

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

Usage in publication:
- Santiago Peak volcanics*
Modifications:
- Mapped
AAPG geologic province:
- Peninsular Ranges province

Publication:

Jahns, R.H., and Lance, J.F., 1950, Geology of the San Dieguito pyrophyllite area, San Diego County, San Diego County, California: California Division of Mines Special Report, no. 4, 32 p.

Summary:

Santiago Peak Volcanics unconformably overlies older series of metasedimentary and metavolcanic rocks designated as the "Julian group", "Julian schist series", "Julian schist", "Santa Ana slates", and "Bedford Canyon formation".

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

Usage in publication:
- Santiago Peak volcanics*
Modifications:
- Areal extent
AAPG geologic province:
- Peninsular Ranges province

Publication:

Jahns, R.H., 1954, Generalized geologic map of the Peninsular Range province, southern California and Baja California, IN Jahns, R.H., ed., Geology of southern California; Chapter II, Geology of the natural provinces: California Division of Mines Bulletin, no. 170, pl. 3.

Summary:

Santiago Peak Volcanics are mapped and extended to the Mexican border. Called "older volcanic rocks" of Jurassic(?) age but text refers to the Santiago Peak Volcanics.

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

Usage in publication:
- Santiago Peak volcanics*
Modifications:
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Allison, E.C., 1955, Middle Cretaceous Gastropoda from Punta China, Baja California, Mexico: Journal of Paleontology, v. 29, no. 3, p. 400-432.

Summary:

Santiago Peak Volcanics are correlated with similar volcanic and pyroclastic rocks and stratigraphic relationships of the Alisitos Formation of Baja California, Mexico. Age of the Alisitos Formation is Aptian-Albian [Early Cretaceous] based on fossils [Gastropoda] from Punta China.

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

Usage in publication:
- Santiago Peak volcanics*
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:

Santiago Peak volcanics is mapped in the Corona South 7.5-min quadrangle, Riverside and Orange Counties, California. Age is Jurassic(?) and Early Cretaceous(?), based on stratigraphic relations.

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

Usage in publication:
- Santiago Peak volcanics*
Modifications:
- Age modified
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:

Alisitos Formation is used for Lower Cretaceous volcanics and sediments (="Santiago Peak Volcanics", Larsen, 1948). Unconformably overlies the Bedford Canyon Formation and unconformably underlies the Rosario Formation. Age is Aptian(?)-middle Albian (Early Cretaceous).

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

Usage in publication:
- Santiago Peak volcanics*
Modifications:
- Age modified
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:

Santiago Peak Volcanics unconformably overlie the Bedford Canyon Formation of Late Jurassic age and unconformably underlie sandstone and conglomerate of Turonian (Late Cretaceous) age; thus age of the Santiago Peak Volcanics is Late Jurassic(?) to Early Cretaceous(?) based on stratigraphic position.

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

Usage in publication:
- Santiago Peak volcanics*
Modifications:
- Age modified
- Geochronologic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Bushee, Jonathan, Holden, John, Geyer, Barbara, and Gastil, Gordon, 1963, Lead-alpha dates for some basement rocks of southwestern California, IN Short Note: Geological Society of America Bulletin, v. 74, no. 6, p. 803-806.

Summary:

"Dacite" sample from Santiago Peak measured approximately 150 Ma (Late Jurassic age) based on lead-alpha dates for zircons.

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

Usage in publication:
- Santiago Peak volcanics*
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:

Santiago Peak Volcanics are mapped in San Diego Co., CA. Called the Black Mountain Volcanics of La Jolla quad and called the Santiago Peak Volcanics to the north.

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

Usage in publication:
- Santiago Peak volcanics*
Modifications:
- Age modified
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Fife, D.L., Minch, J.A., and Crampton, P.J., 1967, Late Jurassic age of the Santiago Peak Volcanics, California, IN Short Note: Geological Society of America Bulletin, v. 78, no. 2, p. 299-304.

Summary:

Interbedded metavolcanic rocks in Lusardi Canyon contain BUCHIA PIOCHII which indicates a Portlandian (Late Jurassic) age.

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

Usage in publication:
- Santiago Peak Volcanics*
AAPG geologic province:
- Peninsular Ranges province

Publication:

Nordstrom, C.E., 1970, Lusardi Formation; a post-batholithic Cretaceous conglomerate north of San Diego, California, IN Note and Discussion: Geological Society of America Bulletin, v. 81, no. 2, p. 601-606.

Summary:

Unconformably underlies the Lusardi Formation (new) of Early to mid-Late Cretaceous age in 25 sq mi area near Rancho Santa Fe, CA.

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Age modified
AAPG geologic province:
- Peninsular Ranges province

Publication:

Kennedy, M.P., and Moore, G.W., 1971, Stratigraphy and structure of the area between Oceanside and San Diego, California; Geologic road log [field trip 8], IN Elders, W.A., ed., Geological Excursions in southern California: University of California-Riverside, Campus Museum Contributions, no. 1, p. 149-166.

Summary:

Age of the Santiago Peak Volcanics is Late Jurassic and Early Cretaceous(?) based on earlier reports.

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Age modified
AAPG geologic province:
- Peninsular Ranges province

Publication:

Morton, P.K., 1972, Geologic guidebook to the northern Peninsular Ranges, Orange and Riverside Counties, California: National Association of Geology Teachers, Far Western Section, Field Trip Guidebook, October, 96 p.

Summary:

Age of the Santiago Peak Volcanics is Jurassic to Cretaceous.

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Geochronologic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Colburn, I.P., 1973, Stratigraphic relations of the southern California Cretaceous strata, IN Colburn, I.P., and Fritsche, A.E., chairpersons, Cretaceous stratigraphy of the Santa Monica Mountains and Simi Hills, southern California: Society of Economic Paleontologists and Mineralogists, Pacific Section, Field Trip Guidebook, p. 45-73.

Summary:

K-Ar ages of 131+/-2.6 Ma to 85+/-2 Ma on andesite porphyry and dacite tuff samples (R. Armstrong) from Silvardo Canyon area indicate Cretaceous age (Neocomian through Coniacian) for the Santiago Peak Volcanics.

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Age modified
AAPG geologic province:
- Peninsular Ranges province

Publication:

Elliott, W.J., 1973, Stratigraphic correlations of southern Orange County, southwestern San Diego County and northern Baja California, IN Ross, Arnold, and Dowlen, R.J., eds., Studies on the geology and geologic hazards of the greater San Diego area, California: San Diego Association of Geologists Field Trip Guidebook, Joint annual field trip of San Diego Association of Geologists and Association of Engineering Geologists, Southern California Section, May, 1973, p. 9-15.

Summary:

Santiago Peak Volcanics unconformably underlies the Lusardi Formation (Late Cretaceous) of the Rosario Group. Intruded by southern California batholith (minimum age of 105+/-10 Ma). Age is Portlandian (Late Jurassic).

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

Usage in publication:
- Santiago Peak Volcanics*
AAPG geologic province:
- Peninsular Ranges province

Publication:

Morton, P.K., 1974, Geology and engineering geologic aspects of the south half of the Canada Gobernadora quadrangle, Orange County, California: California Division of Mines and Geology Special Report, no. 111, 30 p.

Summary:

Santiago Peak Volcanics unconformably underlies the Trabuco Formation (Late Cretaceous); unconformably intrudes and overlies the Bedford Canyon Formation in area of report (south half of Canada Gobernadora quad, Orange Co., CA).

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

Usage in publication:
- Santiago Peak Volcanics*
AAPG geologic province:
- Peninsular Ranges province

Publication:

Gastil, R.G., Phillips, R.P., and Allison, E.C., 1975, Reconnaissance geology of the State of Baja California: Geological Society of America Memoir, 140, 184 p.

Summary:

"Santiago Peak Formation" for Jurassic (Portlandian) strata north of border, "Alisitos Formation" for Aptian and Albian strata and "Jurassic(?)" for pre-Alisitos strata of the San Jose area, Baja CA.

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Mapped
AAPG geologic province:
- Peninsular Ranges province

Publication:

Kennedy, M.P., and Peterson, G.L., 1975, Geology of the San Diego metropolitan area, California: California Division of Mines and Geology Bulletin, no. 200, 56 p.

Summary:

Santiago Peak Volcanics are mapped in Del Mar, La Mesa, Poway, and SW 1/4 of Escondido quads, San Diego Co., CA. Unconformably underlies the Lusardi Formation of the Rosario Group and the Friars Formation of La Jolla Group.

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Age modified
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Jones, D.L., Blake, M.C., Jr., and Rangin, Claude, 1976, The four Jurassic belts of northern California and their significance to the geology of the southern California borderland, IN Howell, D.G., ed., Aspects of the geologic history of the California continental borderland: American Association of Petroleum Geologists, Pacific Section, Miscellaneous Publication, California Borderland Symposium, Santa Cruz Island, CA, September 22-26, 1975, no. 24, p. 343-362., Prepared in cooperation with USGS and Univ. California, Channel Islands Field Station

Summary:

Age of the Santiago Peak Volcanics is Tithonian (Late Jurassic) based on fossils (Fife and others, 1967).

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

Usage in publication:
- Santiago Peak Volcanics*
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:

Santiago Peak Volcanics are mapped in Orange Co., CA. Underlies the San Marcos Gabbro. Age is Jurassic [no basis given].

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

Usage in publication:
- Santiago Peak Volcanics*
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:

Santiago Peak Volcanics are mapped in Black Star Canyon and part of El Toro quads. In Silverado Canyon, the basal 15 m consists of breccia made up of boulders and cobbles (derived from the underlying Bedford Canyon Formation) imbedded in silicified, sandy, altered igneous matrix. Age is Late Jurassic(?) and Early(?) Cretaceous based on stratigraphic relations.

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

Usage in publication:
- Santiago Peak Volcanics*
AAPG geologic province:
- Peninsular Ranges province

Publication:

Adams, M.A., and Walawender, M.J., 1982, Structure and stratigraphy of the Santiago Peak Volcanics east of Rancho Sante Fe, California, IN Abbott, P.L., ed., Geologic studies in San Diego: San Diego Association of Geologists Field Trip Guidebook, p. 104-117.

Summary:

Santiago Peak Volcanics composite section approximately 1,440 m thick is located near Lusardi Creek and Black Mountain Road, San Diego Co., CA.

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Biostratigraphic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

Jones, D.A., and Miller, R.H., 1982, Jurassic fossils from the Santiago Peak Volcanics, San Diego County, California, IN Abbott, P.L., ed., Geologic studies in San Diego: San Diego Association of Geologists Field Trip Guidebook, p. 93-102.

Summary:

Santiago Peak Volcanics measured sections are located at Los Penasquitos, Circo Diegueno and in Lusardi Canyons. Bivalves and belemnites collected at Los Penasquitos and Circo Diegueno Canyons give ages of Tithonian (D.L.Jones, pers. communication, 1981) and Middle Jurassic to earliest Cretaceous (J.A. Jeletzky, communication, 1982).

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Overview
AAPG geologic province:
- Peninsular Ranges province

Publication:

Tanaka, H., Smith, T.E., and Huang, C.H., 1984, The Santiago Peak volcanic rocks of the Peninsular Ranges batholith, southern California; volcanic rocks associated with coeval gabbros: Bulletin Volcanologique, v. 47, no. 1, p. 153-171.

Summary:

Santiago Peak Volcanics are divided into two groups; one, comprising basalts and andesites of tholeiitic series and two, comprising dacites and rhyolites of subalkaline or silicic series. The spatial and temporal relationships and tholeiitic nature of basalts and andesites indicate common origin with the Peninsular Ranges gabbros.

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

Usage in publication:
- Santiago Peak Volcanics*
Modifications:
- Age modified
- Geochronologic dating
AAPG geologic province:
- Peninsular Ranges province

Publication:

GNU Staff, 1993, Draft copy of Todd, V.R., and Shaw, S.E., Petrology and preliminary geochemistry of plutonic rocks in the Peninsular Ranges batholith, southern San Diego County, California, USGS Prof. Paper XXXX (unpublished): U.S. Geological Survey Digital Data Series, DDS-6, 1 CD-ROM., release 3

Summary:

Age of the Santiago Peak Volcanics is everywhere revised from Late Jurassic and Early(?) Cretaceous to: Early Cretaceous based on radiometric (U-Pb; zircon) ages from the unit of 120-130 Ma.

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