Geologic Map of the Corona South 7.5' Quadrangle, Riverside and Orange Counties, California

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: C. H. Gray, Jr.; Douglas M. Morton; F. Harold Weber, Jr.
Publication_Date: 2002
Title: Geologic Map of the Corona South 7.5' Quadrangle, Riverside and Orange Counties, California
Edition: Version 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: OFR 02-21
Publication_Information:
Publication_Place: Menlo Park, California
Publisher: U.S. Geological Survey
Other_Citation_Details:
Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of02-021/
Description:
Abstract:
The data set for the Corona South 7.5' quadrangle was prepared under the U.S. Geological Survey Southern California Areal Mapping Project (SCAMP) as part of an ongoing effort to develop a regional geologic framework of southern California, and to utilize a Geographic Information System (GIS) format to create regional digital geologic databases. These regional databases are being developed as contributions to the National Geologic Map Database of the National Cooperative Geologic Mapping Program of the USGS. This data set maps and describes the geology of the Corona South 7.5' quadrangle, Riverside and Orange Counties, California. Created using Environmental Systems Research Institute's ARC/INFO software, the data base consists of the following items: (1) a map coverage containing geologic contacts and units, (2) a coverage containing structural data, (3) a coverage containing geologic unit annotation and leaders, and (4) attribute tables for geologic units (polygons), contacts (arcs), and site-specific data (points). In addition, the data set includes the following graphic and text products: (1) a postscript graphic plot-file containing the geologic map, topography, cultural data, a Correlation of Map Units (CMU) diagram, a Description of Map Units (DMU), and a key for point and line symbols, and (2) PDF files of the Readme (including the metadata file as an appendix), and the graphic produced by the Postscript plot file. The Corona South quadrangle is located near the northern end of the Peninsular Ranges Province. Diagonally crossing the quadrangle is the northern end of the Elsinore Fault zone, a major active right-lateral strike-slip fault zone of the San Andreas Fault system. East of the fault zone is the Perris block and to the west the Santa Ana Mountains block. Basement in the Perris block part of the quadrangle is almost entirely Cretaceous volcanic rocks and granitic rocks of the Cretaceous Peninsular Ranges batholith. Three small exposures of very low metamorphic grade siliceous rocks correlated on the basis of lithology with Mesozoic age rocks are located near the eastern edge of the quadrangle. Exposures of batholithic rocks is restricted to mostly granodiorite of the Cajalco pluton that underlies extensive areas to the east and north. There are limited amounts of undifferentiated granitic rock and one small body of gabbro. The most extensive basement rocks are volcanic shallow intrusives and extrusives of the Estelle Mountain volcanics. The volcanics, predominantly latite and rhyolite, are quarried as a source of crushed rock. West of the Elsinore Fault zone is a thick section of Bedford Canyon Formation of Jurassic age. This unit consists of incipiently metamorphosed marine sedimentary rocks consisting of argillite, slate, graywacke, impure quartzite, and small pods of limestone. Bedding and other primary sedimentary structures are commonly preserved and tight folds are common. Incipiently developed transposed layering, S1, is locally well developed. Included within the siliceous rocks are small outcrops of fossiliferous limestone than contain a fauna indicating the limestone formed in a so-called black smoker environment. Unconformably overlying and intruding the Bedford Canyon Formation is the Santiago Peak Volcanics of Cretaceous age. These volcanics consist of basaltic andesite, andesite, dacite, rhyolite, breccia and volcanoclastic rocks. Much of the unit has been hydrothermally altered; the alteration was contemporaneous with the volcanism. A minor occurrence of serpentine and associated silica-carbonate rock occurs in association with the volcanics. Sedimentary rocks of late Cretaceous and Paleogene age and a few Neogene age rocks occur within the Elsinore Fault zone. Marine sandstone of the middle Miocene Topanga Formation occurs within the fault zone southeast of Corona. Underlying the Topanga Formation is the nonmarine undivided Sespe and Vaqueros Formation that are predominantly sandstone. Sandstone, siltstone, and conglomerate of the marine and nonmarine Paleocene Silverado Formation extends essentially along the entire length of the fault zone in the quadrangle. Clay beds in the Silverado Formation have been an important source of clay. In the northwest corner of the quadrangle is a thick, faulted, sedimentary section that ranges in age from Cretaceous to early Pliocene-Miocene. Emanating from the Santa Ana Mountains is an extensive alluvial fan complex that underlies Corona and the surrounding valleys. This fan complex includes both Pleistocene and Holocene age deposits. The Elsinore Fault zone at the base of the Santa Ana Mountains splays in the northwestern part of the quadrangle; beyond the quadrangle boundary the name Elsinore Fault is generally not used. The southern splay takes a more western trend and to the west of the quadrangle is termed the Whittier Fault, a major active fault. The eastern splay continues on strike along the east side of the Chino (Puente) Hills north of the quadrangle where it is termed the Chino Fault. The Chino Fault appears to have very limited displacement. The geologic map data base contains original U.S. Geological Survey data generated by detailed field observation recorded on 1:24,000 scale aerial photographs. The map was created by transferring lines from the aerial photographs to a 1:24,000 scale topographic base. The map was digitized and lines, points, and polygons were subsequently edited using standard ARC/INFO commands. Digitizing and editing artifacts significant enough to display at a scale of 1:24,000 were corrected. Within the database, geologic contacts are represented as lines (arcs), geologic units are polygons, and site-specific data as points. Polygon, arc, and point attribute tables (.pat, .aat, and .pat, respectively) uniquely identify each geologic datum.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: C. H. Gray, Jr., Morton, Douglas M. , and F. Harold Weber, Jr., 2002, Geologic Map of the Corona South 7.5' Quadrangle, Riverside and Orange Counties, California: U.S. Geological Survey Open-File Report 02-21, U.S. Geological Survey, Menlo Park, California.
Supplemental_Information:
REFERENCE: Morton, D.M., 1999, Preliminary digital geologic map of the Santa Ana 30'x60'quadrangle, southern California, version 1.0.: U.S. Geological Survey Open-File Report 99-172, U.S. Geological Survey, California. "http://geopubs.wr.usgs.gov/open-file/of99-172/"
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20020101
Ending_Date: 20021231
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -117.62509
East_Bounding_Coordinate: -117.49991
North_Bounding_Coordinate: 33.875
South_Bounding_Coordinate: 33.749985
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > HUMAN DIMENSIONS > NATURAL HAZARDS > EARTHQUAKES
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > LANDFORMS
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > MICROFOSSILS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > FLUVIAL LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > AGE DETERMINATIONS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > BEDROCK LITHOLOGY
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > IGNEOUS ROCKS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > METAMORPHIC ROCKS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > MINERALS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > SEDIMENTARY ROCKS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > SEDIMENTS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > FAULT MOVEMENT
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > FOLDS
Theme_Keyword: MAPS
Theme_Keyword: SCAMP > SOUTHERN CALIFORNIA AREAL MAPPING PROJECT
Theme_Keyword: Geologic Map
Theme_Keyword: Geology
Theme_Keyword: Bedrock Geology
Theme_Keyword: Alluvial Geology
Theme_Keyword: Fault
Theme_Keyword: Cretaceous Tonalite And Granodiorite
Theme_Keyword: Mesozoic Metamorphics
Theme_Keyword: Tertiary Marine Sedimentary Rocks
Theme_Keyword: Quaternary Deposits
Theme_Keyword: Alluvial Fan Deposits
Theme_Keyword: Landslide Deposits
Theme_Keyword: Fernando Formation
Theme_Keyword: Puente Formation
Theme_Keyword: Sycamore Canyon
Theme_Keyword: Topanga Formation
Theme_Keyword: Vaqueros Formation
Theme_Keyword: Sespe Formation
Theme_Keyword: Silverado Formation
Theme_Keyword: Santiago Formation
Theme_Keyword: Williams Formation
Theme_Keyword: Ladd Formation
Theme_Keyword: Holz Shale
Theme_Keyword: Baker Canyon Conglomerate
Theme_Keyword: Micropegmatite Granite
Theme_Keyword: Monzogranite
Theme_Keyword: Serpentinite
Theme_Keyword: Carbonate-silicate Rock
Theme_Keyword: Santiago Peak Volcanics
Theme_Keyword: Estelle Mountain Volcanics
Theme_Keyword: Bedford Canyon Formation
Theme_Keyword: Marble
Theme_Keyword: Elsinore Fault
Theme_Keyword: Mesozoic
Theme_Keyword: Cretaceous
Theme_Keyword: Late Tertiary
Theme_Keyword: Quaternary
Theme_Keyword: Riverside County
Theme_Keyword: Orange County
Theme_Keyword: Corona South 7.5' Quadrangle
Theme_Keyword: Gis
Theme_Keyword: Arcinfo
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: ELEVATION
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA
Access_Constraints: none
Use_Constraints:
The Corona South 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Corona South 7.5' quadrangle as a whole. The data should not be used for purposes of site-specific land-use planning or site-specific geologic evaluations. The database is sufficiently detailed to identify and characterize many actual and potential geologic hazards represented by faults and landslides and posed by ground subsidence and earthquake-generated ground shaking. However, it is not sufficiently detailed for site-specific determinations or evaluations of these features. Faults shown do not take the place of fault-rupture hazard zones designated by the California State Geologist (see Hart, 1988). Use of this digital geologic-map database should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was compiled and edited at a scale of 1:24,000 means that higher resolution information may not have been uniformly retained in the data set. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, although higher resolution data is incorporated in most of the map, the resolution of the combined output will be limited by the lower resolution data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: DOUGLAS M. MORTON
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: U.S. Geological Survey
Address: Department of Earth Sciences
Address: University of California, Riverside
City: Riverside
State_or_Province: CA
Postal_Code: 92521
Country: USA
Contact_Voice_Telephone: (909) 276-6397
Contact_Facsimile_Telephone: (909) 276-6295
Contact_Electronic_Mail_Address: scamp@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: http://geopubs.wr.usgs.gov/open-file/of02-021/images/crs_map.jpg
Browse_Graphic_File_Description:
Reduced-size image of the map, 400x535 pixels, 32-bit RGB true color, 82 kbytes.
Browse_Graphic_File_Type: JPEG
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 1.000366687774 m
Longitude_Resolution: 1.000366687774 n
Geographic_Coordinate_Units: Decimal degrees
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: DOI/USGS/GD/PUBS/WR/GEOPUBS > Publications-Western Region,Geological Division, U.S. Geological Survey, U.S. Department of the Interior
Contact_Person: CAROLYN A. DONLIN
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: U.S. Geological Survey
Address: Geology Division
Address: 345 Middlefield Road
City: Menlo Park
State_or_Province: California
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: 650-329-5015
Contact_Facsimile_Telephone: 650-329-5119
Contact_Electronic_Mail_Address: cdonlin@usgs.gov
Resource_Description: USGS Open-File Report 02-21
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcInfo export
Transfer_Size: 2.2 megabytes
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://geopubs.wr.usgs.gov/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://geopubs.wr.usgs.gov/open-file/of02-021/
Access_Instructions:
Access to data and documentation for OFR 02-21
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://geopubs.wr.usgs.gov/open-file/of99-172/
Access_Instructions:
USGS OFR 99-172
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://geo-nsdi.er.usgs.gov/metadata/open-file/02-...
Access_Instructions:
Complete FGDC Metadata Record for OFR 02-21
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20011126
Metadata_Review_Date: 20050412
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: RACHEL M. HAUSER
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: U.S. Geological Survey
Address: Department of Earth Sciences
Address: University of California, Riverside
City: Riverside
State_or_Province: CA
Postal_Code: 92521
Country: USA
Contact_Voice_Telephone: (909) 276-6397
Contact_Facsimile_Telephone: (909) 276-6295
Contact_Electronic_Mail_Address: rhauser@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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