| State | California |
|---|---|
| Name | Mesozoic granitic rocks, unit 2 (Peninsular Ranges) |
| Geologic age | Middle Jurassic to Late Cretaceous |
| Lithologic constituents |
Major
Igneous > Plutonic > Granitic > Tonalite (Pluton)
Minor
Igneous > Plutonic > Granitic > Granodiorite (Pluton)
Igneous > Plutonic > Syenitic > Quartz-monzonite (Pluton)
Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)
Incidental
Igneous > Plutonic > Granitic > Granite (Pluton)
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite (Dike or sill)
|
| Comments | Peninsular Ranges. Primarily tonalite, granodiorite, and minor quartz monzonite and granite. Emplacement ages mostly 80 to 105 Ma in eastern part of area and 105 to 140 Ma in western part; minor Jurassic rocks in central part |
| Stratigraphic units | Bonsall Tonalite, Bradley "Granodiorite", Cactus Quartz Monzonite, Cajalco Quartz Monzonite, Corona Hornblende Granodiorite Porphyry, Domenigoni Valley Granodiorite, Escondido Creek Leucogranodiorite, Estelle Tonalite, Fargo Canyon "Diorite", Green Valley Tonalite, Home Gardens Quartz Monzonite Porphyry, Indian Mountain Leucogranodiorite, Lakeview Mountain Tonalite, Lake Wolford Leucogranodiorite, La Sierra Tonalite, Mount Hole Granodiorite, Rattlesnake Granite, Roblar Leucogranite, San Jacinto "Granodiorite", Stonewall Quartz Diorite, Woodson Mountain Granodiorite. Southern California Batholith. |
| References | Jennings, C.W., Strand, R.G., Rogers, T.H., Boylan, R.T., Moar, R.R., and Switzer, R.A., 1977, Geologic Map of California: California Division of Mines and Geology, Geologic Data Map 2, scale 1:750,000.Jennings, C.W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p.Rogers, T.H., 1969, Geologic map of California, Olaf P. Jenkins edition, San Bernardino sheet, scale 1:250,000.Strand, R.G., 1962, Geologic map of California, Olaf P. Jenkins edition, San Diego-El Centro sheet, scale 1:250,000.Rogers, T.H., 1966, Geologic map of California, Olaf P. Jenkins edition, Santa Ana sheet, scale 1:250,000.Morton, D.M., 1999, Preliminary digital geologic map of the Santa Ana 30' x 60' quadrangle, southern California: U.S. Geological Survey Open-File Report 99-172, scale 1:100,000.https://pubs.er.usgs.gov/publication/ofr99172 Erskine, B.G., and Wenk, H.-R., 1985, Evidence for Late Cretaceous crustal thinning in the Santa Rosa mylonite zone, southern California: Geology, v. 13, p. 274-277.Gastil, Gordon, Morgan, George, and Krummenacher, Daniel, 1981, The tectonic history of peninsular California and adjacent Mexico, in Ernst, W.G., ed., The geotectonic development of California (Rubey Volume 1): Englewood Cliffs, N.J., Prentice-Hall, p. 284-306.Todd, V.R., Erskine, B.G., and Morton, D.M., 1988, Metamorphic and tectonic evolution of the northern Peninsular Ranges Batholith, southern California, in Ernst, W.G., ed., Metamorphism and crustal evolution of the western United States (Rubey Volume 7): Englewood Cliffs, N.J., Prentice-Hall, p. 894-937.Todd, V.R., Kimbrough, D.L., and Herzig, C.T., 1994, The Peninsular Ranges batholith from western volcanic arc to eastern mid-crustal intrusive and metamorphic rocks, San Diego County, California, in McGill, S.F., and Ross, T.M., eds., Geological investigations of an active margin: Geological Society of America Cordilleran Section Guidebook, 27th Annual Meeting, San Bernardino, California, March 21-23, 1994, p. 227-240.Silver, L.T., Taylor, H.P., Jr., and Chappell, B., 1979, Some petrological, geochemical, and geochronological observations of the Peninsular Ranges batholith near the international border of the U.S.A. and Mexico, in Abbott, P.L., and Todd, V.R., eds., Mesozoic crystalline rocks: Peninsular Ranges batholith and pegmatites, Point Sal Ophiolite: Geological Society of America Guidebook, p. 83-110.Silver, L.T., and Chappell, B.W., 1988, The Peninsular Ranges batholith: an insight into the evolution of the Cordilleran batholiths of southwestern North America: Transactions of the Royal Society of Edinburgh: Earth Sciences, v. 79, p. 105-121.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.Baird, A.K., and Miesch, A.T., 1984, Batholithic rocks of southern California--A model ofr the petrochemical nature of their source materials: U.S. Geological Survey Professional Paper 1284, 42 p.https://pubs.er.usgs.gov/publication/pp1284 |
| NGMDB product | |
| Counties | Imperial - Orange - Riverside - San Bernardino - San Diego |