Dataset Identification:
Resource Abstract:
- description: This data set maps and describes the geology of the Corona North 7.5' quadrangle, Riverside and San Bernardino
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 North quadrangle is located near the
northern end of the Peninsular Ranges Province. All but the southeastern tip of the quadrangle is within the Perris block,
a relatively stable, rectangular in plan area located between the Elsinore and San Jacinto fault zones. The southeastern tip
of the quadrangle is barely within the Elsinore fault zone. The quadrangle is underlain by Cretaceous plutonic rocks that
are part of the composite Peninsular Ranges batholith. These rocks are exposed in a triangular-shaped area bounded on the
north by the Santa Ana River and on the south by Temescal Wash, a major tributary of the Santa Ana River. A variety of mostly
silicic granitic rocks occur in the quadrangle, and are mainly of monzogranite and granodioritic composition, but range in
composition from micropegmatitic granite to gabbro. Most rock units are massive and contain varying amounts of meso- and melanocratic
equant-shaped inclusions. The most widespread granitic rock is monzogranite of the Cajalco pluton, a large pluton that extends
some distance south of the quadrangle. North of Corona is a body of micropegmatite that appears to be unique in the batholith
rocks. Diagonally bisecting the quadrangle is the Santa Ana River. North of the Santa Ana River alluvial deposits are dominated
by the distal parts of alluvial fans emanating from the San Gabriel Mountains north of the quadrangle. Widespread areas of
the fan deposits are covered by a thin layer of wind blown sand. Alluvial deposits in the triangular-shaped area between the
Santa Ana River and Temescal Wash are quite varied, but consist principally of locally derived older alluvial fan deposits.
These deposits rest on remnants of older, early Quaternary or late Tertiary age, nonmarine sedimentary deposits that were
derived from both local sources and sources as far away as the San Bernardino Mountains. These deposits in part were deposited
by an ancestral Santa Ana River. Older are a few scattered remnants of late Tertiary (Pliocene) marine sandstone that include
some conglomerate lenses. Clasts in the conglomerate include siliceous volcanic rocks exotic to this part of southern California.
This sandstone was deposited as the southeastern-most part of the Los Angeles sedimentary marine basin and was deposited along
a rocky shoreline developed in the granitic rocks, much like the present day shoreline at Monterey, California. Most of the
sandstone and granitic paleoshoreline features have been removed by quarrying and grading in the area of Porphyry north to
Highway 91. Excellent exposures in highway road cuts still remain on the north side of Highway 91 just east of the 91-15 interchange
and on the east side of U.S. 15 just north of the interchange. South of Temescal Wash is a series of both younger and older
alluvial fan deposits emanating from the Santa Ana Mountains to the southeast. In the immediate southwest corner of the quadrangle
is a small exposure of sandstone and pebble conglomerate of the Sycamore Canyon member of the Puente Formation of early Pliocene
and Miocene age and sandstone and conglomerate of undivided Sespe and Vaqueros Formations of early Miocene, Oligocene, and
late Eocene age. 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.; abstract:
This data set maps and describes the geology of the Corona North 7.5' quadrangle, Riverside and San Bernardino 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 North quadrangle is located near the
northern end of the Peninsular Ranges Province. All but the southeastern tip of the quadrangle is within the Perris block,
a relatively stable, rectangular in plan area located between the Elsinore and San Jacinto fault zones. The southeastern tip
of the quadrangle is barely within the Elsinore fault zone. The quadrangle is underlain by Cretaceous plutonic rocks that
are part of the composite Peninsular Ranges batholith. These rocks are exposed in a triangular-shaped area bounded on the
north by the Santa Ana River and on the south by Temescal Wash, a major tributary of the Santa Ana River. A variety of mostly
silicic granitic rocks occur in the quadrangle, and are mainly of monzogranite and granodioritic composition, but range in
composition from micropegmatitic granite to gabbro. Most rock units are massive and contain varying amounts of meso- and melanocratic
equant-shaped inclusions. The most widespread granitic rock is monzogranite of the Cajalco pluton, a large pluton that extends
some distance south of the quadrangle. North of Corona is a body of micropegmatite that appears to be unique in the batholith
rocks. Diagonally bisecting the quadrangle is the Santa Ana River. North of the Santa Ana River alluvial deposits are dominated
by the distal parts of alluvial fans emanating from the San Gabriel Mountains north of the quadrangle. Widespread areas of
the fan deposits are covered by a thin layer of wind blown sand. Alluvial deposits in the triangular-shaped area between the
Santa Ana River and Temescal Wash are quite varied, but consist principally of locally derived older alluvial fan deposits.
These deposits rest on remnants of older, early Quaternary or late Tertiary age, nonmarine sedimentary deposits that were
derived from both local sources and sources as far away as the San Bernardino Mountains. These deposits in part were deposited
by an ancestral Santa Ana River. Older are a few scattered remnants of late Tertiary (Pliocene) marine sandstone that include
some conglomerate lenses. Clasts in the conglomerate include siliceous volcanic rocks exotic to this part of southern California.
This sandstone was deposited as the southeastern-most part of the Los Angeles sedimentary marine basin and was deposited along
a rocky shoreline developed in the granitic rocks, much like the present day shoreline at Monterey, California. Most of the
sandstone and granitic paleoshoreline features have been removed by quarrying and grading in the area of Porphyry north to
Highway 91. Excellent exposures in highway road cuts still remain on the north side of Highway 91 just east of the 91-15 interchange
and on the east side of U.S. 15 just north of the interchange. South of Temescal Wash is a series of both younger and older
alluvial fan deposits emanating from the Santa Ana Mountains to the southeast. In the immediate southwest corner of the quadrangle
is a small exposure of sandstone and pebble conglomerate of the Sycamore Canyon member of the Puente Formation of early Pliocene
and Miocene age and sandstone and conglomerate of undivided Sespe and Vaqueros Formations of early Miocene, Oligocene, and
late Eocene age. 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.
Citation
- Title Geologic Map of the Corona North 7.5' Quadrangle, Riverside and San Bernardino Counties, California.
-
- creation Date
2018-05-20T03:03:07.304628
Resource language:
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Digital Transfer Options
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- Linkage for online resource
-
- name Dublin Core references URL
- URL: http://pubs.usgs.gov/of/2002/0022/crn.tar.gz
- protocol WWW:LINK-1.0-http--link
- link function information
- Description URL provided in Dublin Core references element.
Linkage for online resource
- name Dublin Core references URL
- URL: http://pubs.usgs.gov/of/2002/0022/
- protocol WWW:LINK-1.0-http--link
- link function information
- Description URL provided in Dublin Core references element.
Linkage for online resource
- name Dublin Core references URL
- URL: http://pubs.usgs.gov/of/1999/of99-172/
- protocol WWW:LINK-1.0-http--link
- link function information
- Description URL provided in Dublin Core references element.
Metadata data stamp:
2018-08-07T01:14:02Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-07T01:14:02Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
-
-
- Address
-
- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:a23298d1-26bd-46e3-925a-55a89b19b35a
Metadata record format is ISO19139 XML (MD_Metadata)