Identification_Information: Citation: Citation_Information: Originator: Victoria R. Todd Publication_Date: 2004 Title: Preliminary Geologic Map of the El Cajon 30' x 60' Quadrangle, Southern California, Version 1.0 Edition: Version 1.0, 2004 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: USGS OFR 2004-1361 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2004/1361/ Description: Abstract: This data set maps and describes the geology of the El Cajon 30' x 60' quadrangle, southern California. Compilation of the El Cajon quadrangle is based upon published mapping at various scales, unpublished mapping at 1:24,000 scale, and reconnaissance mapping. Mapping was done by fieldwork and the use of aerial photographs at 1:24,000 scale. The El Cajon quadrangle includes parts of two physiographic provinces: the Peninsular Ranges Province on the west underlies the major part of the quadrangle; the western Colorado Desert (locally called the Anza-Borrego Desert) underlies the northeastern corner. The approximate boundary between these two provinces is the Neogene Elsinore Fault Zone, the westernmost on-land strand of the San Andreas Fault System. Movements within the Elsinore Fault Zone are believed to have resulted in the uplift and westward rotation of the Peninsular Ranges block relative to the western Colorado Desert (Gastil and others, 1975). As a result, elevations in the El Cajon quadrangle increase from less than 100 m in the westernmost part of the quadrangle to ~2000 m along the irregular mountainous spine of the Peninsular Ranges (the Cuyamaca, Laguna, Tierra Blanca, and Jacumba Mountains); elevations then decrease rapidly eastward to <100 m in the Anza-Borrego Desert. Southwest of the Elsinore Fault Zone, the El Cajon quadrangle is underlain by Jurassic and Cretaceous plutonic rocks of the composite Peninsular Ranges Batholith, which contains screens of variably metamorphosed Mesozoic supracrustal rocks. Late Jurassic and Early Cretaceous volcanic and volcaniclastic rocks that are exposed in the western part of the quadrangle represent an older, superjacent part of the Peninsular Ranges magmatic arc. Upper Cretaceous and Eocene marine and nonmarine strata were deposited widely upon the eroded batholith but are preserved only in the westernmost part of the quadrangle (the San Diego embayment). Pliocene and Pleistocene coastal terrace deposits rest unconformably upon the early Tertiary rocks in the southwestern corner of the quadrangle. Northeast of the Elsinore Fault Zone, the El Cajon quadrangle exposes extensive Neogene nonmarine and marine sedimentary and volcanic rocks of the Fish Creek-Vallecito basin. Basement uplifts in this region are composed of crystalline rocks of the eastern Peninsular Ranges Batholith (the Vallecito, Fish Creek, and Coyote Mountains). Purpose: The data set for the El Cajon 30' x 60' 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: 2004 Currentness_Reference: New data Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -117 East_Bounding_Coordinate: -115.99581042 North_Bounding_Coordinate: 33.00400553 South_Bounding_Coordinate: 32.54065598 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Geologic map Theme_Keyword: Geology Theme_Keyword: Bedrock geology Theme_Keyword: Surficial geology Theme_Keyword: Fault Theme_Keyword: Peninsular Ranges Batholith Place: Place_Keyword_Thesaurus: None Place_Keyword: California Place_Keyword: San Diego County Place_Keyword: Imperial County Place_Keyword: El Cajon 30' x 60' quadrangle Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: metamorphic miogeoclinal Paleozoic rocks Stratum_Keyword: metamorphosed Triassic and Jurassic submarine fan deposits Stratum_Keyword: Jurassic and Cretaceous granitic rocks Stratum_Keyword: Upper Cretaceous marine sedimentary rocks Stratum_Keyword: Eocene marine and nonmarine sedimentary rocks Stratum_Keyword: Neogene sedimentary and volcanic rocks Access_Constraints: None Use_Constraints: The El Cajon 30' x 60' geologic-map database should be used to evaluate and understand the geologic character of the El Cajon 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 1:100,000 means that higher resolution information may not have been uniformly retained in the dataset. Plotting at scales larger than 1:100,000 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: USA Contact_Voice_Telephone: (909)276-6397 Contact_Facsimile_Telephone: (909)276-6295 Contact_Electronic_Mail_Address: scamp@usgs.gov Data_Set_Credit: Technical review by F.K. Miller and M.P. Kennedy led to significant improvements that eventually were reflected in aspects of the database, the plot file, and in the description of the geologic units of the El Cajon 30' x 60' quadrangle. 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 Geological Survey, and (3) the Southern California Areal Mapping Project (SCAMP). Native_Data_Set_Environment: Windows_NT, 5.1, Intel ARC/INFO version 8.2 Cross_Reference: Citation_Information: Originator: Everhart, D.L. Publication_Date: 1951 Title: Geology of the Cuyamaca Peak quadrangle, San Diego County, California Edition: Bulletin 159 Geospatial_Data_Presentation_Form: bulletin Series_Information: Series_Name: California Division of Mines and Geology Bulletin Publication_Information: Publication_Place: California Publisher: California Division of Mines and Geology, Department of Conservation Cross_Reference: Citation_Information: Originator: Hanna, M.A. Publication_Date: 1926 Title: Geology of the La Jolla quadrangle, California Edition: Bulletin v. 16 Geospatial_Data_Presentation_Form: bulletin Series_Information: Series_Name: Department of Geological Sciences Bulletin Publication_Information: Publication_Place: California Publisher: University of California Cross_Reference: Citation_Information: Originator: Hoggatt, W.C. Publication_Date: 1979 Title: Geologic map of the Sweeney Pass quadrangle, San Diego County, California Edition: Open-File report 79-754 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Open-File report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Hoggatt, W.C., and Todd, V.R. Publication_Date: 1977 Title: Geologic map of the Descanso quadrangle, San Diego County, California Edition: Open-File report 77-406 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Open-File report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Jachens, R.C. Publication_Date: 1992 Title: Aeromagnetic map of the El Cajon 1:100,000 scale quadrangle, California Edition: Open-File report 92-548 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Open-File report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Kennedy, M.P. Publication_Date: 1975 Title: Geology of western San Diego metropolitan area, California Edition: Bulletin 200 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: California Division of Mines and Geology Bulletin Publication_Information: Publication_Place: California Publisher: California Division of Mines and Geology, Department of Conservation Cross_Reference: Citation_Information: Originator: Kennedy, M.P. Publication_Date: in press Title: Geologic Map of the San Diego 30' x 60' Quadrangle, California: scale 1:100,000 Edition: in press Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Open-File report Publication_Information: Publication_Place: California Publisher: California Geological Survey, Department of Conservation Cross_Reference: Citation_Information: Originator: Kennedy, M.P., and Peterson, G.L. Publication_Date: 1975 Title: Geology of the eastern San Diego metropolitan area, California Edition: Bulletin 200 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: California Division of Mines and Geology Bulletin Publication_Information: Publication_Place: California Publisher: California Division of Mines and Geology, Department of Conservation Cross_Reference: Citation_Information: Originator: Kennedy, M.P., and Tan, S.S. Publication_Date: 1977 Title: Geology of National City, Imperial Beach, and Otay Mesa quadrangles, southern San Diego metropolitan area, California Edition: Map Sheet 29 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: California Division of Mines and Geology Map Sheet Publication_Information: Publication_Place: California Publisher: California Division of Mines and Geology, Department of Conservation Cross_Reference: Citation_Information: Originator: Strand, R.G. Publication_Date: 1962 Title: Geologic map of California, San Diego-El Centro sheet, scale 1:250,000 Edition: Open-File report 1962 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: California Division of Mines and Geology Map Publication_Information: Publication_Place: California Publisher: California Division of Mines and Geology, Department of Conservation Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1977 Title: Geologic map of the Cuyamaca Peak quadrangle, San Diego County, California Edition: Open-File report 77-405 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1977 Title: Geologic map of the Agua Caliente Springs quadrangle, San Diego County, California Edition: Open-File report 77-742 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1978 Title: Geologic map of the Monument Peak quadrangle, San Diego County, California Edition: Open-File Report 78-697 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1978 Title: Geologic map of the Viejas Mountain quadrangle, San Diego County, California Edition: Open-File Report 78-113 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1979 Title: Geologic map of the Mount Laguna quadrangle, San Diego County, California Edition: Open-File Report 79-862 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1980 Title: Geologic map of the Alpine quadrangle, San Diego County, California Edition: Open-File Report 80-82 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1982 Title: Geologic map of the Tule Springs quadrangle, San Diego County, California Edition: Open-File Report 82-221 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1983 Title: Geologic map of the El Cajon Mountain quadrangle, San Diego County, California Edition: Open-File Report 83-781 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: Todd, V.R. Publication_Date: 1995 Title: Geologic map of the Mount Laguna 15' quadrangle, San Diego County, California Edition: Open-File Report 95-522 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Geologic-map units in the El Cajon 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 1:100,000-scale geologic maps produced by the project. Geologic lines and points on 1:100,000 scale geologic maps are judged to meet SCAMP's internal map-accuracy standards if they are located to within +/-50 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 (UTM 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 and digital database of the El Cajon 30' x 60' quadrangle contain new and compiled 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 area. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The maximum transformation RMS error acceptable for 30' x 60' quadrangle transformation and data input is 0.003 (7.6 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 (V.R. Todd). Process_Date: 1996 - 2001 Process_Step: Process_Description: Transfer of geologic linework and point data from field maps and aerial photographs to a scale-stable cartographic base of quadrangle (V.R. Todd). Process_Date: 2001 Process_Step: Process_Description: The geologic map information was scanned from a clear-film, base-stable blackline positive of the author-prepared geologic map at 1:100,000 scale. The raster scan was auto-vectorized, converted to an ARC/INFO coverage using standard ARC/INFO commands, and minimally attributed by TGS Techni Graphic Systems, Inc. Process_Date: 2002 - 2003 Process_Step: Process_Description: ARC/INFO database revised; polygon, arc, and point attribute tables updated to conform to other SCAMP coverages. Digitizing and editing artifacts significant enough to display at a scale of 1:100,000 scale were corrected (R.M. Alvarez). Process_Date: 2003 - 2004 Process_Step: Process_Description: The four coverages that provide base map reference data (hypsography/topography, hydrography, and transportation/road/rail/cultural information) were derived from USGS 1:100,000 scale DLGs available on the Web: http://edcwww.cr.usgs.gov/glis/glis.html (R.M. Alvarez) Process_Date: 2003 Process_Step: Process_Description: Science reviews completed by F.K. Miller and M.P. Kennedy; technical/digital review completed by P.M. Cossette. Process_Date: 2004 Process_Step: Process_Description: First draft of metadata created by Rachel Alvarez using FGDCMETA.AML ver. 1.2 05/14/98 on ARC/INFO data set c:\ralvarez\el_cajon\100krelease\ec1_geo Process_Date: 20040423 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: 3418 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 11614 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 3419 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 11 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 1.0 Longitude_of_Central_Meridian: -117.50 Latitude_of_Projection_Origin: 32.50 False_Easting: 0.000 False_Northing: 0.000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 9.394323283332 Ordinate_Resolution: 9.394323283332 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 El Cajon 30' x 60' quadrangle comprises six ARC/INFO coverages, of which three contain geologic data, one contains cartographic features, and four provide base-map, DLG-derived, reference data: ec1_geo (geology), ec1_str (structural point data), ec1_arw (landslide arrows), ec1_anno (geologic unit annotation, label leaders, locality names), ec_hypso (hypsography), ec_hydro (hydrography), ec_roads and ec_rail (transportation and cultural data). Entity_and_Attribute_Detail_Citation: none Detailed_Description: Entity_Type: Entity_Type_Label: ec1_geo.pat Entity_Type_Definition: Geologic units (LABL) and their corresponding names (NAME) identified in the El Cajon 30' x 60' quadrangle. Attribute: Attribute_Label: LABL Attribute_Definition: geologic map unit label, in plain text Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qya Enumerated_Domain_Value_Definition: Young alluvium Enumerated_Domain: Enumerated_Domain_Value: Qc Enumerated_Domain_Value_Definition: Colluvium Enumerated_Domain: Enumerated_Domain_Value: Qu Enumerated_Domain_Value_Definition: Alluvium, undivided Enumerated_Domain: Enumerated_Domain_Value: Qls Enumerated_Domain_Value_Definition: Landslide deposits Enumerated_Domain: Enumerated_Domain_Value: Qoa Enumerated_Domain_Value_Definition: Older alluvium Enumerated_Domain: Enumerated_Domain_Value: Qm Enumerated_Domain_Value_Definition: Mesa Conglomerate Enumerated_Domain: Enumerated_Domain_Value: Qt Enumerated_Domain_Value_Definition: Terrace deposits Enumerated_Domain: Enumerated_Domain_Value: Ql Enumerated_Domain_Value_Definition: Lindavista Formation Enumerated_Domain: Enumerated_Domain_Value: QTf Enumerated_Domain_Value_Definition: Fanglomerate Enumerated_Domain: Enumerated_Domain_Value: QTps Enumerated_Domain_Value_Definition: Palm Spring Formation Enumerated_Domain: Enumerated_Domain_Value: Tsd Enumerated_Domain_Value_Definition: San Diego Formation Enumerated_Domain: Enumerated_Domain_Value: To Enumerated_Domain_Value_Definition: Otay Formation Enumerated_Domain: Enumerated_Domain_Value: Ti Enumerated_Domain_Value_Definition: Imperial Formation Enumerated_Domain: Enumerated_Domain_Value: Tf Enumerated_Domain_Value_Definition: Fanglomerate Enumerated_Domain: Enumerated_Domain_Value: Tfc Enumerated_Domain_Value_Definition: Fish Creek Gypsum Enumerated_Domain: Enumerated_Domain_Value: Tsm Enumerated_Domain_Value_Definition: Split Mountain Formation Enumerated_Domain: Enumerated_Domain_Value: Tal Enumerated_Domain_Value_Definition: Alverson Andesite Enumerated_Domain: Enumerated_Domain_Value: Tj Enumerated_Domain_Value_Definition: Jacumba Volcanics Enumerated_Domain: Enumerated_Domain_Value: Ta Enumerated_Domain_Value_Definition: Anza Formation Enumerated_Domain: Enumerated_Domain_Value: Tp Enumerated_Domain_Value_Definition: Pomerado Conglomerate Enumerated_Domain: Enumerated_Domain_Value: Tmv Enumerated_Domain_Value_Definition: Mission Valley Formation Enumerated_Domain: Enumerated_Domain_Value: Tst Enumerated_Domain_Value_Definition: Stadium Conglomerate Enumerated_Domain: Enumerated_Domain_Value: Tfr Enumerated_Domain_Value_Definition: Friars Formation Enumerated_Domain: Enumerated_Domain_Value: Kl Enumerated_Domain_Value_Definition: Lusardi Formation Enumerated_Domain: Enumerated_Domain_Value: Kmgp Enumerated_Domain_Value_Definition: Monzogranite of Mother Grundy Peak Enumerated_Domain: Enumerated_Domain_Value: Kcm Enumerated_Domain_Value_Definition: Corte Madera Monzogranite Enumerated_Domain: Enumerated_Domain_Value: Kcp Enumerated_Domain_Value_Definition: Chiquito Peak Monzogranite Enumerated_Domain: Enumerated_Domain_Value: Kjv Enumerated_Domain_Value_Definition: Japatul Valley Tonalite Enumerated_Domain: Enumerated_Domain_Value: Ka Enumerated_Domain_Value_Definition: Tonalite of Alpine Enumerated_Domain: Enumerated_Domain_Value: Kgr Enumerated_Domain_Value_Definition: Granitoid rocks Enumerated_Domain: Enumerated_Domain_Value: Klb Enumerated_Domain_Value_Definition: Tonalite of Las Bancas Enumerated_Domain: Enumerated_Domain_Value: Kc Enumerated_Domain_Value_Definition: Cuyamaca Gabbro Enumerated_Domain: Enumerated_Domain_Value: KJtg Enumerated_Domain_Value_Definition: Tonalite and gabbro Enumerated_Domain: Enumerated_Domain_Value: KJld Enumerated_Domain_Value_Definition: Leucocratic dikes Enumerated_Domain: Enumerated_Domain_Value: Kih Enumerated_Domain_Value_Definition: Indian Hill granodiorite of Parrish and others (1986) Enumerated_Domain: Enumerated_Domain_Value: Klp Enumerated_Domain_Value_Definition: Tonalite of La Posta Enumerated_Domain: Enumerated_Domain_Value: Kgm Enumerated_Domain_Value_Definition: Tonalite of Granite Mountain Enumerated_Domain: Enumerated_Domain_Value: Kgm4 Enumerated_Domain_Value_Definition: Tonalite of Granite Mountain, Unit 4 Enumerated_Domain: Enumerated_Domain_Value: Kgm3 Enumerated_Domain_Value_Definition: Tonalite of Granite Mountain, Unit 3 Enumerated_Domain: Enumerated_Domain_Value: Kgm2 Enumerated_Domain_Value_Definition: Tonalite of Granite Mountain, Unit 2 Enumerated_Domain: Enumerated_Domain_Value: Kgm1 Enumerated_Domain_Value_Definition: Tonalite of Granite Mountain, Unit 1 Enumerated_Domain: Enumerated_Domain_Value: Kpv Enumerated_Domain_Value_Definition: Monzogranite of Pine Valley Enumerated_Domain: Enumerated_Domain_Value: KJem Enumerated_Domain_Value_Definition: Quartz Diorite of East Mesa Enumerated_Domain: Enumerated_Domain_Value: Jcr Enumerated_Domain_Value_Definition: Granodiorite of Cuyamaca Reservoir Enumerated_Domain: Enumerated_Domain_Value: Jhc Enumerated_Domain_Value_Definition: Gneiss of Harper Creek Enumerated_Domain: Enumerated_Domain_Value: Jsp Enumerated_Domain_Value_Definition: Migmatitic schist and gneiss of Stephenson Peak Enumerated_Domain: Enumerated_Domain_Value: Ksp Enumerated_Domain_Value_Definition: Santiago Peak Volcanics Enumerated_Domain: Enumerated_Domain_Value: Kmv Enumerated_Domain_Value_Definition: Metavolcanic rocks Enumerated_Domain: Enumerated_Domain_Value: KJvs Enumerated_Domain_Value_Definition: Metavolcanic and metasedimentary rocks Enumerated_Domain: Enumerated_Domain_Value: JTRm Enumerated_Domain_Value_Definition: Metasedimentary and metavolcanic rocks Enumerated_Domain: Enumerated_Domain_Value: MzPzm Enumerated_Domain_Value_Definition: Rocks of Jacumba Mountains Enumerated_Domain: Enumerated_Domain_Value: Pzm Enumerated_Domain_Value_Definition: Metasedimentary rocks Attribute: Attribute_Label: NAME Attribute_Definition: Geologic name of map unit (see list under LABL attribute) Detailed_Description: Entity_Type: Entity_Type_Label: ec1_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 line type Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, approximately located Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain: Enumerated_Domain_Value: contact, queried Enumerated_Domain: Enumerated_Domain_Value: fault, approximately located Enumerated_Domain: Enumerated_Domain_Value: fault, certain Enumerated_Domain: Enumerated_Domain_Value: fault, certain, apparent scarp Enumerated_Domain: Enumerated_Domain_Value: fault, concealed Enumerated_Domain: Enumerated_Domain_Value: fault, concealed, queried Enumerated_Domain: Enumerated_Domain_Value: fault, inferred Enumerated_Domain: Enumerated_Domain_Value: fault, queried Enumerated_Domain: Enumerated_Domain_Value: scratch boundary Enumerated_Domain: Enumerated_Domain_Value: water boundary Enumerated_Domain: Enumerated_Domain_Value: map boundary Detailed_Description: Entity_Type: Entity_Type_Label: ec1_str.pat Entity_Type_Definition: Geologic structural point data includes site-specific information describing the types and orientation of bedding, foliation, and lineation. Dip values for each point are also stored as annotation. Attribute: Attribute_Label: PTTYPE Attribute_Definition: Description of point type Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: anticline symbol Enumerated_Domain: Enumerated_Domain_Value: bedding, horizontal Enumerated_Domain: Enumerated_Domain_Value: bedding, inclined Enumerated_Domain: Enumerated_Domain_Value: dip of fault Enumerated_Domain: Enumerated_Domain_Value: direction of plunge of fold axis Enumerated_Domain: Enumerated_Domain_Value: igneous foliation, inclined Enumerated_Domain: Enumerated_Domain_Value: igneous foliation, vertical Enumerated_Domain: Enumerated_Domain_Value: metamorphic foliation, inclined Enumerated_Domain: Enumerated_Domain_Value: metamorphic foliation, vertical Enumerated_Domain: Enumerated_Domain_Value: syncline symbol Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Box 25286 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-202-4700 Contact_Facsimile_Telephone: 303-202-4693 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 any particular purpose. The burden for determining 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 El Cajon 30' x 60' quadrangle, 1:100,000 map-scale, and any derivative maps thereof, is not meant to be used or displayed at any scale larger than 1:100,000 (e.g., 1:24,000). Metadata_Reference_Information: Metadata_Date: 20040423 Metadata_Review_Date: 20040617 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Rachel 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: ralvarez@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