| State | California |
|---|---|
| Name | Paleozoic and Permo-Triassic granitic rocks, unit 2 (San Gabriel Mountains) |
| Geologic age | Late Triassic |
| Lithologic constituents |
Major
Igneous > Plutonic > Syenitic > Quartz-monzonite (Pluton)
Minor
Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)
Igneous > Plutonic > Granitic > Granodiorite (Pluton)
Igneous > Plutonic > Syenitic > Monzonite (Pluton)
Igneous > Plutonic > Dioritic > Quartz-monzodiorite (Pluton)
Igneous > Plutonic > Dioritic > Diorite (Pluton)
|
| Comments | San Gabriel Mountains. Mt. Lowe Intrusion |
| Stratigraphic units | Mount Lowe Granodiorite, Parker Quartz Diorite |
| 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.Jennings, C.W., and Strand, R.G., 1969, Geologic map of California, Olaf P. Jenkins edition, Los Angeles sheet, scale 1:250,000.Rogers, T.H., 1969, Geologic map of California, Olaf P. Jenkins edition, San Bernardino sheet, scale 1:250,000.Powell, R.E., 1993, Balanced palinspastic reconstruction of pre-late Cenozoic paleogeology, southern California: Geologic and kinematic constraints on evolution of the San Andreas fault system, in Powell, R.E., Weldon, R.J., II, and Matti, J.C., eds., The San Andreas fault system: Displacement, palinspastic reconstruction, and geologic evolution: Geological Society of America Memoir 178, p. 1-106, scale 1:750,000.Ehlig, P.L., 1981, Origin and tectonic history of the basement terrane of the San Gabriel Mountains, central Transverse Ranges, in Ernst, W.G., ed., The geotectonic development of California (Rubey Volume 1): Englewood Cliffs, N.J., Prentice-Hall, p. 253-283.Barth, A.P., Tosdal, R.M., Wooden, J.L., and Howard, K.A., 1997, Triassic plutonism in southern California: southward younging of arc initiation along a truncated continental margin: Tectonics, v. 16, p. 290-304.Barth, A.P., and Ehlig, P.L., 1988, Geochemistry and petrogenesis of the marginal zone of the Mount Lowe Intrusion, central San Gabriel Mountains, California: Contributions to Mineralogy and Petrology, v. 100, p. 192-204. |
| NGMDB product | |
| Counties | Los Angeles |