U.S. Geological Survey
Open-File Report 02-021
U.S.
Geological Survey
Open-File Report 02-021
Geologic Map of the Corona South 7.5’Quadrangle, Riverside and Orange Counties, California
By
Digital preparation by Kelly R. Bovard and Timothy O’Brien
Prepared
in cooperation with
CALIFORNIA DIVISION OF MINES AND GEOLOGY
|
INTRODUCTION Open-File
Report 01-021 contains a digital geologic map database of the Corona South
7.5’ quadrangle, Riverside County, California that includes: The Correlation
of Map Units and Description of Map Units is in the editorial format of
USGS Geologic Investigations Series (I-series) maps but has not been edited
to comply with I-map standards. Within the geologic map data package,
map units are identified by standard geologic map criteria such as formation-name,
age, and lithology. Where known, grain size is indicated on the map by
a subscripted letter or letters following the unit symbols as follows:
lg, large boulders; b, boulder; g, gravel; a, arenaceous; s, silt; c,
clay; e.g. Qyfa is a predominantly young alluvial fan deposit that is
arenaceous. Multiple letters are used for more specific identification
or for mixed units, e.g., Qfysa is a silty sand. In
some cases, mixed units are indicated by a compound symbol; e.g., Qyf2sc.
Marine deposits are in part overlain by local, mostly alluvial fan, deposits
and are labeled Qomf. Grain size follows f. Even though
this is an Open-File Report and includes the standard USGS Open-File disclaimer,
the report closely adheres to the stratigraphic nomenclature of the U.S.
Geological Survey. Descriptions of units can |
 |
This illustration is a .jpg non-navigable image of the USGS geologic-map plot of the Corona South quadrangle, showing only the area of the map. A full-size, navigable map graphic can be plotted from the PostScript file (crs_map.ps.gz). Note: the full-size plot is approximately 52 x 36 inches, requires a large-format plotter, and is best reproduced at 600 (or greater) dpi. |
Learn more
about the Corona
South data set and its contents
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File
Name
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File
Type and Description
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File
Size
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README's
and METADATA
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|
Text version of readme
file that explains how to use the digital database |
48
KB
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| Portable Document Format (PDF) version of the readme file that explains how to use the digital database |
92
KB
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| Text file of the FGDC-compliant metadata |
32
KB
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DATA
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| Symbol set (including points, lines, and color sets) used for this map. This file will allow users to generate plots that use the same symbols as in the plot available here |
44
KB
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| Compressed
tar file of the digital database for this map |
2.2
MB
(compressed) |
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FILES
FOR VIEWING AND PLOTTING
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Compressed
PostScript file used for plotting a paper
copy of the map |
4.1
MB
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PDF
version of the map for viewing
|
2.2
MB
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Visit the GeoScience Node of the National Spatial Data Clearinghouse to find other geologic-map datasets in southern California or elsewhere in the Nation Download a free copy of Adobe Reader For questions about the content of this report, contact Douglas Morton |
| Help | PDF help | Geopubs main page | Open-File Reports for 2001 |
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| Department of the Interior | U.S. Geological Survey | Geologic Division | Earth Surface Processes |
This report
is only available on the web