qfaults web comp Archived report (may contain descriptions that are not current)

Berrocal fault zone (Class A) No. 57

Last Review Date: 2000-08-15

Compiled in cooperation with the California Geological Survey

County(s) and State(s) SAN MATEO COUNTY, CALIFORNIA
SANTA CLARA COUNTY, CALIFORNIA
Physiographic province(s) PACIFIC BORDER
Reliability of location Good
Compiled at 1:250,000 scale.
Length (km) 57 km.
Average strike N46°W
Sense of movement Reverse
Dip 20° SW to 90°
Historic earthquake
Most recent prehistoric deformation undifferentiated Quaternary (<1.6 Ma)
Slip-rate category Between 0.2 and 1.0 mm/yr
References Bailey, E.H., and Eberhart, D.L., 1964, Geology and quicksilver deposits of the New Almaden district, Santa Clara County, California: U.S. Geological Survey Professional Paper 360, p. 206.

Bedrossian, T.L., 1980, Berrocal fault, northern segment: California Division of Mines and Geology Fault Evaluation Report FER-98, microfiche copy in California Division of Mines and Geology Open-File Report 90-11, scale 1:24,000.

Brabb, E.C., and Dibblee, T.W., Jr., 1979, Preliminary geologic map of the Castle Rock Ridge quadrangle, Santa Cruz and Santa Clara Counties, California: U.S. Geological Survey Open-File Report 79-659, 1 sheet, scale 1:24,000.

Burgmann, R., Arrowsmith, R., Dumitru, R., and McLaughlin, R.J., 1994, Rise and fall of the southern Santa Cruz Mountains, California, from fission tracks, geomorphology, and geodesy: Journal of Geophysical research, v. 99, no. B10, p. 20,181-20,202.

Burgmann, R., Segall, P., Arrowsmith, R., and Dumitru, T., 1994, Slip rates and earthquake hazard along the Foothills trust belt in the southern Santa Cruz Mountains, California [abs.]: Geological Society of America Abstracts with Programs, v. 26, no. 7, p. 191.

Cotton, W.R., Cole, W.F., and Wallace, J.M., 1994, Geologic constraints on the Quaternary tectonic history of range-front deformation, northeastern margin of the Central Santa Cruz Mountains, California: EOS Transactions, American Geophysical Union, v. 75, no. 44, p. 682.

Dibblee, T.W., Jr., 1973, Preliminary geologic maps of the Gilroy Hot Springs quadrangle, the Gilroy quadrangle, the Mt. Sizer quadrangle, the Morgan Hill quadrangle, Santa Clara County, California, and the Mt. Madonna quadrangle, Santa Clara and Santa Cruz Counties, California: U.S. Geological Survey Open-File Report 73-059, 5 sheets, scale 1:24,000.

Dibblee, T.W., Jr., and Brabb, E.E., 1978, Preliminary geologic maps of the Chittenden, Los Gatos, and Watsonville East quadrangles, California: U.S. Geological Survey Open-File Report 78-453, 3 sheets, scale 1:24,000.

Dibblee, T.W., Jr., and Brabb, E.E., 1980, Preliminary geologic map of the Loma Prieta quadrangle, Santa Cruz and Santa Clara Counties, California: U.S. Geological Survey Open-File Report 80-944, 1 sheet, scale 1:24,000.

Hart, E.W., and Bryant, W.A., 1997, Fault-rupture hazard zones in California: California Division of Mines and Geology Special Report 42, 38 p.

Haugerud, R.A., and Ellen, S.D., 1990, Coseismic ground deformation along the northeast margin of the Santa Cruz Mountains, in Schwartz, D.P., and Ponti, D.J., eds., Field guide to neotectonics of the San Andreas fault system, Santa Cruz Mountains, in light of the Loma Prieta earthquake: U.S. Geological Survey Open-File Report 90-274, p. 32-37.

Hay, E.A., Cotton, W.R., and Hall, N.T., 1980, Shear couple tectonics and the Sargent-Berrocal fault system in northern California: California Division of Mines and Geology Special Report 140, 41-49 p.

Hilley, G.E., Arrowsmith, R.R., and Burgmann, R., 1997, Investigation of active deformation using a landscape development model and field examination of landforms and geology along the northeastern margin of the southern Santa Cruz Mountains [abs.]: Geological Society of America Abstracts with Programs, v. 29, no. 6, p. 324.

Hitchcock, C.S., and Kelson, K.I., 1999, Growth of late Quaternary folds in southwest Santa Clara Valley, San Francisco Bay area, California: Implications of triggered slip for seismic hazard and earthquake recurrence: Geology, v. 27, no. 5, p. 391–394.

Hitchcock, C.S., Kelson, K.I., and Thompson, S.C., 1994, Geomorphic investigations of deformation along the northeastern margin of the Santa Cruz Mountains: U.S. Geological Survey Open-File Report 94-187, 50 p.

Jennings, C.W., 1994, Fault activity map of California and adjacent areas, with locations of recent volcanic eruptions: California Division of Mines and Geology Geologic Data Map 6, 92 p., 2 pls., scale 1:750,000.

Lajoie, K.R., 1996, Northeast Santa Cruz Mountains thrust/fold belt: U.S. Geological Survey Open-File Report 96-267, 86-104 p.

Langenheim, V.E., Schmidt, K.M., and Jachens, R.C., 1997, Coseismic deformation during the 1989 Loma Prieta earthquake and range-front thrusting along the southwestern margin of the Santa Clara Valley, California: Geology, v. 25, no. 12, p. 1091-1094.

McLaughlin, R.J., 1974, The Sargent-Berrocal fault zone and its relation to the San Andreas fault system in the southern San Francisco Bay region and Santa Clara Valley, California: U.S. Geological Survey Journal of Research, v. 2, no. 5, p. 593-598.

McLaughlin, R.J., Clark, J.C., and Brabb, E.E., 1988, Geologic map and structure sections of the Loma Prieta quadrangle, Santa Clara and Santa Cruz Counties, California: U.S. Geological Survey Open-File Map 88-752, scale 1:24,000.