Tertiary intrusive rocks (hypabyssal), unit 2 (Quien Sabe Volcanic Field)

Tertiary intrusive rocks; mostly shallow (hypabyssal) plugs and dikes. Includes some Mesozoic rocks.
State California
Name Tertiary intrusive rocks (hypabyssal), unit 2 (Quien Sabe Volcanic Field)
Geologic age Tertiary
Lithologic constituents
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Pluton)
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-andesite (Pluton)
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basaltic-andesite (Pluton)
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Pluton)
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basalt (Pluton)

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 Unpublished M.S. thesis, San Jos‚ State University, San Jos‚, California, 102 p.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 Unpublished M.S. Thesis, the Pennsylvania State University, College Station, Pennsylvania, 78 p.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 Merced - San Benito - Santa Clara