| State | California |
|---|---|
| Name | Tertiary volcanic flow rocks, unit 18 (San Joaquin-Kings Canyon) |
| Geologic age | Tertiary (3-4 Ma) |
| Lithologic constituents |
Major
Igneous > Volcanic > Alkalic-volcanic > Basanite (Flow, Volcaniclastic-volcanic breccia)
Minor
Igneous > Volcanic > Alkalic-volcanic > Foidite (Flow, Volcaniclastic-volcanic breccia)
Incidental
Igneous > Volcanic > Felsic-volcanic > Trachyte (Flow, Volcaniclastic-volcanic breccia)
|
| Comments | strongly alkaline rocks, possibly related to lithospheric delamination of root of Sierra Nevada batholith |
| References | Farmer, G.L., Glazner, A.F., and Manley, C.R., 2002, Did lithospheric delamination trigger late Cenozoic potassic volcanism in the southern Sierra Nevada, California? Geol. Soc. Amer. Bulletin, v. 114, p. 754-768.Manley, C.R., Glazner, A.F., and Farmer, G.L., 2000, Timing of volcanism in the Sierra Nevada of California-Evidence for Pliocene delamination of the batholitihic root?, Geology, v. 28, p. 811-814.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. |
| NGMDB product | |
| Counties | Fresno - Inyo - Madera - Mariposa - Mono |