Tertiary volcanic flow rocks, unit 1 (Quien Sabe-Burdell Mountain)

Tertiary volcanic flow rocks; minor pyroclastic deposits.
State California
Name Tertiary volcanic flow rocks, unit 1 (Quien Sabe-Burdell Mountain)
Geologic age Tertiary (9.5-13 Ma)
Lithologic constituents
Igneous > Volcanic > Mafic-volcanic > Andesite (Flow, Volcaniclastic-volcanic breccia, Pyroclastic)
Igneous > Volcanic > Felsic-volcanic > Dacite (Flow, Volcaniclastic-volcanic breccia, Pyroclastic)
Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow, Volcaniclastic-volcanic breccia)
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow, Volcaniclastic-volcanic breccia)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Dome)
Comments two areas separated by San Andreas Fault system
Stratigraphic units Quien Sabe Volcanics

Drinkwater, J.L. and Sorg, D.H., and Weigand, P.W., 1988, Petrographic and chemical data for the Quien Sabe volcanic rocks in the Mariposa Peak Quadrangle, central Diablo Range, California: U.S. Geological Survey Open-File Report 88-642, 32 p.


Drinkwater, J.L., Sorg, D.H., and Russell, P.C., 1992, Geologic map showing ages and mineralization of Quien Sabe volcanics, Mariposa Peak quad, west-central California. U.S. Geological Survey Miscellaneous Field Investigations Map MF-2200.


Drinkwater, James, 1983, Geology of the northeastern part of the Quien Sabe volcanics, Merced County, California. Unpublished M.S. thesis, San Jos‚ State University, San Jos‚, California, 102 p.

Whitlock, Jaime S., 2002, Evidence of a mantle wedge source for slab window volcanism in the northern California coast ranges. Unpublished M.S. Thesis, the Pennsylvania State University, College Station, Pennsylvania, 78 p.

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 Marin - Merced - San Benito - Santa Clara - Sonoma