Geologic map and digital database of the San Bernardino Wash 7.5 minute quadrangle, Riverside County, California

Open-File Report 2002-498
Prepared in cooperation with the National Park Service and the California Geological Survey
By:  and 



The geologic map and digital database of the San Bernardino Wash quadrangle are products of a regional geologic mapping effort undertaken in the eastern Transverse Ranges in and around Joshua Tree National Park. This investigation, part of the Southern California Areal Mapping Project (SCAMP), is conducted in cooperation with the California Geologic Survey and the National Park Service. In line with the goals of the National Cooperative Geologic Mapping Program (NCGMP), mapping of the San Bernardino Wash and other quadrangles has been directed toward generating a multipurpose digital geologic map database that is applicable to land-related investigations in the earth and biological sciences. This mapping is conducted to further understanding of bedrock geology and surficial processes in the region and to document evidence for seismotectonic activity in the eastern Transverse Ranges. It is also intended to serve as a base layer suitable for ecosystem and mineral resource assessment and for building a hydrogeologic framework for Pinto Basin.

Initial investigations span Pinto Basin from the Hexie and Eagle Mountains northward into the Pinto Mountains (see fig. 1). Quadrangles mapped include the Conejo Well 7.5-minute quadrangle (Powell, 2001a), the Porcupine Wash 7.5-minute quadrangle (Powell, 2001b), the Pinto Mountain 7.5-minute quadrangle (Powell, 2002), and the San Bernardino Wash 7.5-minute quadrangle. Parts of the San Bernardino Wash quadrangle had been mapped previously at a variety of scales (Weir, and Bader, 1963; Hope, 1966, 1969; Jennings, 1967; Powell, 1981, 1993).

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Geologic map and digital database of the San Bernardino Wash 7.5 minute quadrangle, Riverside County, California
Series title Open-File Report
Series number 2002-498
DOI 10.3133/ofr02498
Year Published 2002
Language English
Publisher U.S. Geological Survey
Contributing office(s) Geology, Minerals, Energy and Geophysics Science Center
Description Pamphlet: ii, 28 p.; Map: 44.07 x 33.83 inches; Readme; Metadata; Map: PS.GZ; Database
Country United States
State California
County Riverside County
Other Geospatial Joshua Tree National Park
Projection Lambert conformal conic projection
Scale 24000
Additional Online Files (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details