Geologic and geophysical maps of the El Casco 7.5′ quadrangle, Riverside County, southern California, with accompanying geologic-map database
Links
- Document: Pamphlet (pdf)
- Sheets:
- Sheet 1 (pdf) Plot file of the geologic map of the El Casco 7.5' quadrangle
- Sheet 2 (pdf) Plot file of observation data for the El Casco 7.5' quadrangle
- Sheet 3 (pdf) Plot file of the gravity map
- Dataset: Data (zip)
- Metadata: Metadata (txt)
- Read Me: Read Me (txt)
- NGMDB Index Page: National Geologic Map Database Index Page
- Download citation as: RIS | Dublin Core
Introduction
Earth materials and structures in the El Casco quadrangle provide considerable information about the late Cenozoic geologic evolution of southern California’s Inland Empire region (fig. 2). Important structural and stratigraphic elements include (1) modern traces of the right-lateral San Jacinto Fault zone, (2) older traces of the San Jacinto Fault zone, and (3) sedimentary materials and geologic structures that formed during the last eight million years or so and that record interactions within the San Andreas Fault system. These materials, and the structures that deform them, provide a geologic context 3 for investigations of groundwater recharge and subsurface flow (Waring, 1919; Burnham and Dutcher, 1960; Bloyd, 1971; Rewis and others, 2006).
This geologic database of the El Casco 7.5′ quadrangle was prepared by the Basins and Landscape Co-Evolution Project (BALANCE), a regional geologic-mapping project sponsored jointly by the U.S. Geological Survey and the California Geological Survey. The database was developed as a contribution to the National Cooperative Geologic Mapping Program’s National Geologic Map Database, and provides a general geologic setting of the El Casco quadrangle. The database and map provide information about earth materials and geologic structures, including faults and folds that have developed in the quadrangle due to complexities in the San Andreas Fault system.
Geologic information contained in the El Casco database is general-purpose data applicable to land-related investigations in the earth and biological sciences. The term “general-purpose” means that all geologic-feature classes have minimal information content adequate to characterize their general geologic characteristics and to interpret their general geologic history. However, no single feature class has enough information to definitively characterize its properties and origin. For this reason the database cannot be used for site-specific geologic evaluations, although it can be used to plan and guide investigations at the site-specific level.
Suggested Citation
Matti, J.C., Morton, D.M., and Langenheim, V.E., 2015, Geologic and geophysical maps of the El Casco 7.5′ quadrangle, Riverside County, southern California, with accompanying geologic-map database: U.S. Geological Survey Open-File Report 2010–1274, 141 p., 3 sheets, scale 1:24,000, http://dx.doi.org/10.3133/ofr20101274.
ISSN: 2331-1258 (online)
Study Area
Table of Contents
- Geologic Overview
- Introduction
- Acknowledgments
- Quaternary Surficial Materials
- Cenozoic Sedimentary Materials
- Depositional History of the San Timoteo and Mt. Eden Formations
- Crystalline Basement Rocks
- Structural Geology
- Geomorphic Features
- Geophysical Investigations
- Outline of Geologic History
- Subsurface Borings and Geotechnical Investigations
- Description Of Map Units
- References Cited
- Appendix 1
Publication type | Report |
---|---|
Publication Subtype | USGS Numbered Series |
Title | Geologic and geophysical maps of the El Casco 7.5′ quadrangle, Riverside County, southern California, with accompanying geologic-map database |
Series title | Open-File Report |
Series number | 2010-1274 |
DOI | 10.3133/ofr20101274 |
Year Published | 2015 |
Language | English |
Publisher | U.S. Geological Survey |
Publisher location | Reston, VA |
Contributing office(s) | Geology, Minerals, Energy, and Geophysics Science Center |
Description | Report: vi, 141; 3 Sheets: 46.77 x 36.00 inches or smaller; Dataset; Metadata; Read Me |
Country | United States |
State | California |
County | Riverside County |
Other Geospatial | El Casco 7.5' quadrangle |
Scale | 24000 |
Online Only (Y/N) | Y |
Additional Online Files (Y/N) | N |
Google Analytic Metrics | Metrics page |