Identification_Information: Citation: Citation_Information: Originator: Douglas M. Morton Originator: C. H. Gray, Jr. Publication_Date: 2002 Title: Geologic Map of the Corona North 7.5' Quadrangle, Riverside and San Bernardino 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: USGS OFR 02-22 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: URL:http://geopubs.wr.usgs.gov/open-file/of02-22 Description: 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. Purpose: The data set for the Corona North 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. Supplemental_Information: none Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Currentness_Reference: New data Status: Progress: Complete Maintenance_and_Update_Frequency: As Needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -117.6250914 East_Bounding_Coordinate: -117.4999086 North_Bounding_Coordinate: 33.99999995 South_Bounding_Coordinate: 33.87498415 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geologic map Theme_Keyword: geology Theme_Keyword: bedrock geology Theme_Keyword: alluvial geology Place: Place_Keyword_Thesaurus: None Place_Keyword: California Place_Keyword: Riverside County Place_Keyword: San Bernardino County Place_Keyword: Corona North 7.5' quadrangle Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: Cretaceous tonalite and granodiorite Stratum_Keyword: Tertiary marine sedimentary rocks Stratum_Keyword: Quaternary deposits Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Cretaceous Temporal_Keyword: late Tertiary Temporal_Keyword: Quaternary Access_Constraints: None Use_Constraints: The Corona North 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Corona North 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 dataset. 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_Organization: U.S. Geological Survey, Western Region, Earth Surface Processes Team Contact_Position: Project geologist Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: Department of Earth Sciences Address: University of California, Riverside City: Riverside State_or_Province: California Postal_Code: 92521 Country: United States of America Contact_Voice_Telephone: (909) 276-6397 Contact_Facsimile_Telephone: (909) 276-6295 Contact_Electronic_Mail_Address: scamp@usgs.gov Data_Set_Credit: Geologic mapping and digital preparation of this report were sponsored jointly by (1) the National Cooperative Geologic Mapping Program of the U.S. Geological Survey, (2) the California Division of Mines and Geology, and (3) the Southern California Areal Mapping Project (SCAMP). Native_Data_Set_Environment: SunOS, 5.8, sun4m UNIX ARC/INFO version 7.2.1 Cross_Reference: Citation_Information: Originator: Morton, D.M. Publication_Date: 1999 Title: Preliminary digital geologic map of the Santa Ana 30'x60' quadrangle, southern California, version 1.0. Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: USGS OF 99-172 Publication_Information: Publication_Place: California Publisher: U.S. Geological Survey Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of99-172 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Geologic-map units in the Corona North quadrangle database were described using standard field methods. Consistent with these methods, the database author has assigned standard geologic attributes to geologic lines, points, and polygons identified in the database. Nation-wide geologic-map accuracy standards have not been developed and adopted by the U.S. Geological Survey and other earth-science entities. Until such standards are adopted, the SCAMP project has developed internal map-accuracy standards for 1:24,000-scale geologic maps produced by the project. Geologic lines and points on 1:24,000 scale geologic maps are judged to meet SCAMP's internal map-accuracy standards if they are located to within +/-15 meters, relative to topographic or cultural features on the base map. On any derivative geologic-map plot, line data that are judged to meet the SCAMP internal map-accuracy standard are denoted by solid lines; line data that may not meet the SCAMP internal map-accuracy standard are denoted by dashed or dotted lines. There is no cartographic device for denoting the map-accuracy for geologic-point data (e.g., symbols representing bedding, foliation, lineations, etc.). Logical_Consistency_Report: Polygon and chain-node topology present. The areal extent of the map is represented digitally by an appropriately projected (polyconic projection), mathematically generated box. Consequently, polygons intersecting the lines that comprise the map boundary are closed by that boundary. Polygons internal to the map boundary are completely enclosed by line segments which are themselves a set of sequentially numbered coordinate pairs. Point data are represented by coordinate pairs. Completeness_Report: The geologic map database of the Corona North 7.5' quadrangle contains new data that have been subjected to rigorous review and are a substantially complete representation of the current state of knowledge concerning the geology of the quadrangle. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The maximum transformation RMS error acceptable for a 7.5' quadrangle transformation and data input is 0.003 (1.8 meters). Horizontal positional accuracy was checked by visual comparison of hard-copy plots with base-stable source data. Lineage: Process_Step: Process_Description: Field mapping and aerial photograph interpretation; iterative process (D.M. Morton). Process_Date: 1977; 1996 Process_Step: Process_Description: Field mapping and aerial photograph interpretation; iterative process (C.H. Gray). Process_Date: 1970; 1995 Process_Step: Process_Description: Digitization of geologic linework and point data from a scale-stable cartographic base of quadrangle. ARC/INFO database established; cleanup of artifacts; polygon, arc, and point attribute tables established. Digitizing and editing artifacts significant enough to display at a scale of 1:24,000 were corrected (K.R. Bovard and M.L. Dawson). Process_Date: 1999-2001 Process_Step: Process_Description: Description of map units and correlation of map units (K.C. Corriea). Process_Date: 2001 Process_Step: Process_Description: First draft of metadata created by mwatson using FGDCMETA.AML ver. 1.2 05/14/98 on ARC/INFO data set /scamp26/mwatson/crn/crn_geo Process_Date: 20011126 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 232 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 574 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 233 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Polyconic Polyconic: Latitude_of_True_Scale: 33.875 Longitude_of_Central_Meridian: -117.5625 False_Easting: 0.00000 False_Northing: 0.00000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.000366806984 Ordinate_Resolution: 1.000366806984 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: Version 1.0 of the Corona North 7.5' quadrangle comprises three ARC/INFO coverages, of which two contain geologic data, and one contains cartographic features: crn_geo (geology), crn_str (structural data), and crn_ano (annotation and leaders). Geologic data represented by line entities and the polygons they delineate are contained in the coverage CRN_GEO. For display purposes, the annotation coverage contains three annotation subclasses: anno.geo contains unit labels, anno.fault contains fault names, and anno.mountain contains peak names. Geological point data includes site-specific information describing the types and the orientation of bedding, foliation, and lineations. Annotation is respective dip and plunge values associated with individual point data. > >CRN_GEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 4 12 F 3 > 5 PERIMETER 4 12 F 3 > 9 CRN_GEO# 4 5 B - > 13 CRN_GEO-ID 4 5 B - > 17 LABL 35 35 C - > 52 SHD 3 3 I - > 55 PLABL 35 35 C - > 90 SHDFIL 3 3 I - > 93 NAME 200 200 C - > > >CRN_GEO.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 FNODE# 4 5 B - > 5 TNODE# 4 5 B - > 9 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 4 12 F 3 > 21 CRN_GEO# 4 5 B - > 25 CRN_GEO-ID 4 5 B - > 29 LTYPE 35 35 C - > 64 L-SYMB 3 3 I - > > Entity_and_Attribute_Detail_Citation: none Detailed_Description: Entity_Type: Entity_Type_Label: crn_geo.pat Entity_Type_Definition: Geologic units (LABL) and their corresponding names (NAME) identified in the Corona North 7.5' quadrangle Attribute: Attribute_Label: LABL Attribute_Definition: geologic map unit label, in plain text Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qaf Enumerated_Domain_Value_Definition: Artificial fill Enumerated_Domain: Enumerated_Domain_Value: Qwa Enumerated_Domain_Value_Definition: Very young wash deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qywa Enumerated_Domain_Value_Definition: Young wash deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qyfa Enumerated_Domain_Value_Definition: Young alluvial fan deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qyfg Enumerated_Domain_Value_Definition: Young alluvial fan deposits, gravel Enumerated_Domain: Enumerated_Domain_Value: Qyf1g Enumerated_Domain_Value_Definition: Young alluvial fan deposits, Unit 1, gravel Enumerated_Domain: Enumerated_Domain_Value: Qyaa Enumerated_Domain_Value_Definition: Young alluvial channel deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qye Enumerated_Domain_Value_Definition: Young eolian deposits Enumerated_Domain: Enumerated_Domain_Value: Qowa Enumerated_Domain_Value_Definition: Old wash deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qofa Enumerated_Domain_Value_Definition: Old alluvial fan deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qofg Enumerated_Domain_Value_Definition: Old alluvial fan deposits, gravel Enumerated_Domain: Enumerated_Domain_Value: Qof1g Enumerated_Domain_Value_Definition: Old alluvial fan deposits, Unit 1, gravel Enumerated_Domain: Enumerated_Domain_Value: Qoa Enumerated_Domain_Value_Definition: Old alluvial channel deposits Enumerated_Domain: Enumerated_Domain_Value: Qoaa Enumerated_Domain_Value_Definition: Old alluvial channel deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qova Enumerated_Domain_Value_Definition: Old alluvial valley deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qvofa Enumerated_Domain_Value_Definition: Very old alluvial fan deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: Qvofg Enumerated_Domain_Value_Definition: Very old alluvial fan deposits, gravel Enumerated_Domain: Enumerated_Domain_Value: Qvoaa Enumerated_Domain_Value_Definition: Very old alluvial channel deposits, arenaceous Enumerated_Domain: Enumerated_Domain_Value: QTn Enumerated_Domain_Value_Definition: Late Cenozoic sedimentary rocks in Norco area Enumerated_Domain: Enumerated_Domain_Value: Tns Enumerated_Domain_Value_Definition: Sandstone of Norco area Enumerated_Domain: Enumerated_Domain_Value: Tpsc Enumerated_Domain_Value_Definition: Sycamore Canyon Member of Puente Formation Enumerated_Domain: Enumerated_Domain_Value: Tvs Enumerated_Domain_Value_Definition: Vaqueros and Sespe Formations, undifferentiated Enumerated_Domain: Enumerated_Domain_Value: Kmp Enumerated_Domain_Value_Definition: Micropegmatite granite of Gavilan Ring Complex Enumerated_Domain: Enumerated_Domain_Value: Kmpc Enumerated_Domain_Value_Definition: Micropegmatite and granodiorite of Cajalco pluton, undifferentiated Enumerated_Domain: Enumerated_Domain_Value: Krg Enumerated_Domain_Value_Definition: Granite of the Riverside area Enumerated_Domain: Enumerated_Domain_Value: Kmhg Enumerated_Domain_Value_Definition: Mount Hole Granodiorite Enumerated_Domain: Enumerated_Domain_Value: Klst Enumerated_Domain_Value_Definition: La Sierra Tonalite Enumerated_Domain: Enumerated_Domain_Value: Kcg Enumerated_Domain_Value_Definition: Monzogranite of Cajalco Pluton Enumerated_Domain: Enumerated_Domain_Value: Kcgb Enumerated_Domain_Value_Definition: Granodiorite and gabbro of Cajalco Pluton, undifferentiated Enumerated_Domain: Enumerated_Domain_Value: Kqd Enumerated_Domain_Value_Definition: Quartz diorite of Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: Kd Enumerated_Domain_Value_Definition: Diorite of Peninsular Ranges batholith, undifferentiated Enumerated_Domain: Enumerated_Domain_Value: Kgb Enumerated_Domain_Value_Definition: Gabbro of Peninsular Ranges batholith Attribute: Attribute_Label: PLABL Attribute_Definition: Geological map unit label used to generate plot labels with relevant stratigraphic symbols. The geologic units with LABL designating Mesozoic (Mz) have keystroke substitute characters, }, that call their corresponding symbols from the Geoage Font Group. Geologic map unit labels will plot on derivative map plots with appropriate stratigraphic symbols if PLABL is used as the source for unit labels. Attribute: Attribute_Label: SHD Attribute_Definition: polygon color (as integer value) from shadeset alc1.shd Attribute: Attribute_Label: SHDFIL Attribute_Definition: polygon fill pattern (as integer value) from shadeset geology2.shd Attribute: Attribute_Label: NAME Attribute_Definition: Geologic name of map unit (see list under LABL attribute) Detailed_Description: Entity_Type: Entity_Type_Label: crn_geo.aat Entity_Type_Definition: Geologic features such as contacts and faults that bound rock-unit polygons Attribute: Attribute_Label: LTYPE Attribute_Definition: Description of types of lines on the geologic map (contact, fault). Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: map boundary Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value: fault, queried Enumerated_Domain_Value: fault, concealed Enumerated_Domain_Value: fault, approx. located Enumerated_Domain_Value: fault, concealed, queried Attribute: Attribute_Label: L-SYMB Attribute_Definition: stores appropriate line symbol value from the lineset geoscamp2.lin Detailed_Description: Entity_Type: Entity_Type_Label: crn_str.pat Entity_Type_Definition: Geological point data includes site-specific information describing the types and the orientation of bedding, foliation, and lineation. One annotation subclass is included in the geologic points coverage, CRN_STR which displays the respective dip and plunge values associated with individual point data. Attribute: Attribute_Label: PTTYPE Attribute_Definition: describes type of point data (bedding, horizontal bedding, foliation) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: bedding Attribute: Attribute_Label: P-SYMB Attribute_Definition: Coded integer value that relates point to cartographic point symbol in markerset geoscamp2.mrk Attribute: Attribute_Label: STRIKE Attribute_Definition: Azimuthal strike of planar feature Attribute: Attribute_Label: DIP Attribute_Definition: Dip of planar feature Detailed_Description: Entity_Type: Entity_Type_Label: crn_ano.aat Entity_Type_Definition: Annotation leaders Attribute: Attribute_Label: L-SYMB Attribute_Definition: Coded integer value (1) that relates arcs to cartographic line symbol in lineset geoscamp2.lin Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Information Services Contact_Address: Address_Type: mailing address Address: Box 25286 Denver Federal Center City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Facsimile_Telephone: (303)202-4693 Contact_Voice_Telephone: (303)202-4700 Distribution_Liability: The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS. This digital geologic map database of the Corona North 7.5' quadrangle, 1:24,000 map-scale, and any derivative maps thereof, is not meant to be used or displayed at any scale larger than 1:24,000 (e.g., 1:12,000). Metadata_Reference_Information: Metadata_Date: 20011126 Metadata_Review_Date: 20020103 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Rachel M. H. Alvarez Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: Department of Earth Sciences Address: University of California, Riverside City: Riverside State_or_Province: California 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: Version of June 8, 1994 Metadata_Access_Constraints: none Metadata_Use_Constraints: none