Tertiary volcanic flow rocks, unit 18 (San Joaquin-Kings Canyon)

Tertiary volcanic flow rocks; minor pyroclastic deposits.
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