Originator: Victoria R. Todd

        Title: Geologic Map of the Morena Reservoir 7.5-minute Quadrangle, San Diego County, California

        Edition: 1.0

        Publication_Date: 2016

        Geospatial_Data_Presentation_Form: Vector digital data


          Series_Name: U.S. Geological Survey Open-File Report

          Issue_Identification: 95-50



        The Morena Reservoir quadrangle is located in the south-central part of the Peninsular Ranges batholith. Prebatholithic and plutonic map units of the quadrangle include units that occur in both eastern and western zones of the Peninsular Ranges batholith: from east to west, the Julian Schist (JTrm); the gneiss of Harper Creek (Jhc); the granodiorite of Cuyamaca Reservoir (Jcr); the Tonalite of Granite Mountain (Kgm); the Tonalite of La Posta (Klp); a unit of metavolcanic and metasedimentary rocks (KJvs); the quartz diorite of East Mesa (KJem); the tonalite of Japatul Valley (Kjv); the monzogranite of Chiquito Peak (Kcp); the monzogranite of Corte Madera (Kcm); a unit of leucocratic dikes (Kl); the Cuyamaca Gabbro (Kc); and the tonalite of Las Bancas (Klb). Scattered late Cenozoic deposits including fanglomerate (QTf), colluvium (Qc), younger alluvium (Qya), and alluvium of active washes (Qaw) overlie basement rocks.


        The major structure in the Morena Reservoir quadrangle is the 22-km-long Hauser Canyon lineament, one of two extensive west-northwest-trending lineaments in this part of the batholith.  The ductile-to-brittle Hauser Canyon Fault is exposed in the canyon that eroded along this lineament. Western and eastern segments of the fault exhibit left-lateral offset of plutonic contacts of about 1-2 km. The central segment of the fault truncates contacts within the zoned Long Potrero-Granite Mountain-La Posta plutonic complex. A structural study by Rector (1994) indicated fault activity during, and closely following, intrusion of the complex accompanied by uplift of the southern block relative to the northern block. Scarce zones of breccia exposed in and near the canyon bottom suggest Neogene reactivation of the fault.


        The Morena Reservoir quadrangle contains screens consisting of, on the east, Triassic-Jurassic marine turbidites (the Julian Schist) and, on the west, Cretaceous-Jurassic metasedimentary and metavolcanic back-arc basinal rocks (unit KJvs). These screens closely constrain a prebatholithic boundary, which, together with the westernmost border of Jurassic plutons, marks the trace of a suture that extends the length of the Peninsular Ranges batholith separating it into western and eastern zones. Uranium-lead zircon ages of plutons of the Long Potrero plutonic complex, which intruded the suture, for example, ~107 Ma for Granite Mountain and ~110 for La Posta (Todd and others, 2014), suggest that movement on the suture had ceased by the late Early Cretaceous in this part of the batholith.

      Purpose: This map database is designed to serve as a base layer applicable and relevant to ecosystem management, resource assessment, and land management decision-making.


        The Morena Reservoir 7.5-minute-quadrangle map database was completed using ArcGIS 10.2, a geographical information system (GIS) software product of Environmental Systems Research Institute (ESRI).  The database comprises an ArcGIS file geodatabase within which are multiple feature classes.


        This report includes a pamphlet, a map plot file with Correlation of Map Units (CMU) and Description of Map Units (DMU), an ESRI File geodatabase, ESRI shapefiles of the non-annotation featureclasses, an ESRI style file ( and this metadata report.


        Within the geologic map database, map units are identified by standard geologic map criteria such as formation name, age, and lithology.


        The ESRI File Geodatbase included in this report has the following feature classes.  Those marked with an asterisk (*) have also been converted to a shapefile.  For more information on the feature classes included in the database see the Entity and Attribute Information section.

        MorRes_CartoPoints *


        MorRes_Geolines *

        MorRes_Geopolys *




        MorRes_Strucpoints *




          Beginning_Date: 1975

          Ending_Date: 1981

      Currentness_Reference: period of geologic data collection


      Progress: Complete

      Maintenance_and_Update_Frequency: None planned



        West_Bounding_Coordinate: -116.626373

        East_Bounding_Coordinate: -116.500154

        North_Bounding_Coordinate: 32.750488

        South_Bounding_Coordinate: 32.624625



        Theme_Keyword_Thesaurus: None

        Theme_Keyword: geoscientific information

        Theme_Keyword: geology

        Theme_Keyword: geologic map

        Theme_Keyword: geologic database

        Theme_Keyword: geologic units

        Theme_Keyword: geologic structure

        Theme_Keyword: geologic contacts

        Theme_Keyword: geologic faults

        Theme_Keyword: surficial geology

        Theme_Keyword: bedrock geology

        Theme_Keyword: dikes

        Theme_Keyword: Hauser Fault Zone


        Place_Keyword_Thesaurus: None

        Place_Keyword: California

        Place_Keyword: southern California

        Place_Keyword: San Diego County

        Place_Keyword: Morena Reservoir 7.5 minute quadrangle


        Stratum_Keyword_Thesaurus: None

        Stratum_Keyword: surficial deposits

        Stratum_Keyword: metamorphic rocks

        Stratum_Keyword: igneous rocks

        Stratum_Keyword: plutonic rocks

        Stratum_Keyword: alluvium

        Stratum_Keyword: colluvium

        Stratum_Keyword: fanglomerate

        Stratum_Keyword: gabbro

        Stratum_Keyword: monzongranite

        Stratum_Keyword: gneiss

        Stratum_Keyword: granodiorite

        Stratum_Keyword: pegmatite

        Stratum_Keyword: quartz diorite

        Stratum_Keyword: schist

        Stratum_Keyword: tonalite


        Temporal_Keyword_Thesaurus: None

        Temporal_Keyword: Quaternary

        Temporal_Keyword: Holocene

        Temporal_Keyword: Pleistocene

        Temporal_Keyword: Mesozoic

        Temporal_Keyword: Cretaceous

        Temporal_Keyword: Jurassic

        Temporal_Keyword: Triassic

    Access_Constraints: None

    Use_Constraints: Spatial Resolution: 




          Contact_Person: Robert E. Powell

          Contact_Organization: U.S.Geological Survey, Geology and Geophysics Science Center

        Contact_Position: Project geologist


          Address_Type: mailing address


            U.S. Geological Survey

            Room 353

            520 N. Park Avenue

          City: Tucson

          State_or_Province: AZ

          Postal_Code: 85719-5035

          Country: USA

        Contact_Voice_Telephone: (520) 670-5505

        Contact_Facsimile_Telephone: (520) 670-5571


    Data_Set_Credit: Digital database prepared by Susan C. Hollis, Douglas M Hirschberg, and Jordan G. Matti. Digital cartography and metadata prepared by Douglas M Hirschberg.

    Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS



      Attribute_Accuracy_Report: Geologic features were symbolized based on their attributes and plotted at 1:24,000-scale, then compared visually with the original source geologic map.  The author reviewed the data.  Attribute values for each feature match the author's intent.

    Logical_Consistency_Report: A topology class was used to insure digitizing consistency of polylines in the MorRes_Geolines dataset and polygons in the MorRes_Geopolys dataset.  There are no overlapping lines, no overlapping or sliver polygons.  Line intersections are topologically correct.  The dangles and pseudo nodes that are present were confirmed that they are acceptable to properly portray geologic features.

    Completeness_Report: This database is considered complete.



        Process_Description: Geology mapped by Victoria R. Todd. Geologic data drafted onto a mylar topographic base map of the Morena Reservoir 7.5 minute quadrangle

        Process_Date: 1975-1981


        Process_Description: Mylar base scanned and registered to UTM zone 11, NAD 1927 projection/datum.

        Process_Date: 2009


        Process_Description: Geologic features digitized and attributed in an ESRI ArcGIS 9.3 Personal Geodatabase.

        Process_Date: 2009-2011


        Process_Description: GIS data checked against source map for locational and attributional accuracy and completeness. Topology rules validated. Errors and inconsistencies were remediated with input from author.

        Process_Date: 2011-2014


        Process_Description: Geodatabase converted to ESRI ArcGIS 10.2 File Geodatabase.  Data transformed from NAD 1927 to NAD 1983.

        Process_Date: 2014-06-21


        Process_Description: Final edits to geologic data were made. Geologic map plot file, report pamphlet, and metadata report completed. Feature classes were exported to shapefiles.

        Process_Date: 2015-05-20


    Direct_Spatial_Reference_Method: Vector



        SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

        Point_and_Vector_Object_Count: 3


        SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

        Point_and_Vector_Object_Count: 417


        SDTS_Point_and_Vector_Object_Type: Entity point

        Point_and_Vector_Object_Count: 452


        SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

        Point_and_Vector_Object_Count: 167


        SDTS_Point_and_Vector_Object_Type: Entity point

        Point_and_Vector_Object_Count: 9


        SDTS_Point_and_Vector_Object_Type: String

        Point_and_Vector_Object_Count: 78


        SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

        Point_and_Vector_Object_Count: 178


        SDTS_Point_and_Vector_Object_Type: String

        Point_and_Vector_Object_Count: 306





          Map_Projection_Name: NAD 1983 UTM Zone 11N


            Scale_Factor_at_Central_Meridian: 0.9996

            Longitude_of_Central_Meridian: -117.0

            Latitude_of_Projection_Origin: 0.0

            False_Easting: 500000.0

            False_Northing: 0.0


          Planar_Coordinate_Encoding_Method: coordinate pair


            Abscissa_Resolution: 0.0001

            Ordinate_Resolution: 0.0001

          Planar_Distance_Units: meter


        Horizontal_Datum_Name: D North American 1983

        Ellipsoid_Name: GRS 1980

        Semi-major_Axis: 6378137.0

        Denominator_of_Flattening_Ratio: 298.257222101




        Dataset: MorRes_Cartopoints

        Dataset Definition:  Annotative symbols to cartographically convey information about linear or polygonal geologic features.  These are non-analyzable points for map display only; for example, a bar and ball symbol and query symbols.

        Data Fields:

        Feature - Feature identifer

        Style - The style (symbol) identifier found in

        Symazim - The angular value by which the cartographic symbol was rotated to match the digitizing source map.

      Entity_and_Attribute_Detail_Citation: none



        Dataset: MorRes_Fault_anno

        Dataset Definition: Fault names annotation for map display

      Entity_and_Attribute_Detail_Citation: none



        Dataset: MorRes_Geolines

        Dataset Definition: Linear geologic features; contacts and faults. In this database both contacts and faults can bound (define) a map unit polygon.

        Data Fields:

        Feature - Feature identifier or type of geologic linear feature.

        Style - Style (symbol) found in

        Name - Fault name if so assigned.

      Entity_and_Attribute_Detail_Citation: none



        Dataset: MorRes_Geopolys

        Dataset Definition: Geologic map unit polygons.

        Data Fields:

        Ord - Stratigraphic order of map unit

        Mulabl - Map unit label. See the Open-File Report pamphlet for a list and map unit details.

        Lithology - Basic geologic characteristics of the map unit

        Age - Stratigraphic age of the map unit

      Entity_and_Attribute_Detail_Citation: none



        Dataset: MorRes_Inclination_anno

        Dataset Definition: Dip or plunge amount annotation to accompany structural point data on the map display.

      Entity_and_Attribute_Detail_Citation: none



        Dataset: MorRes_Leaderlines

        Dataset Definition: Lines to connect map unit annotation labels to corresponding map unit polygons where the annotation label does not fit inside the polygon.  For cartographic display purposes only.

      Entity_and_Attribute_Detail_Citation: none



        Dataset: MorRes_Mapunit_anno

        Dataset Definition: Cartographic map unit annotation using the GeoAge font for substitute characters for special geologic age characters and numeric subscripts.

      Entity_and_Attribute_Detail_Citation: none



        Dataset: Julian_Strucpoints

        Dataset Definition: Planar and linear structural point data

        Data Fields:

        Feature - An identification of the structural data measurement.

        Strike - The direction or trend taken by a structural surface as measured along the horizontal.  Recorded as azimuthal degrees between 0 and 360 with 0/360 degrees representing North. Follows the right-hand rule. Null values are allowed.

        Dip - The maximum angle that a structural surface makes with the horizontal; measured perpendicular to the strike of the structure and in the vertical plane.  Recorded as degrees between 0 and 90.  Null values are allowed.

        Dipazim - The direction of dip as measured perpendicular to the strike.  Null values are allowed.

        Bearing - The direction in which the linear geological structure plunges.  Recorded as azimuthal degrees between 0 and 360, with 0/360 degrees representing North.  Null values are allowed.

        Plunge - The angle between a linear structure and the horizontal as measured in the vertical plane containing the linear structure.  Null values are allowed.

        Style - Style (symbol) identifier found in

        Symazim - The angular value by which the cartographic symbol must be rotated.  Assumes that the symbol is oriented to 0/360 degrees = North.  Null values are not allowed.

        comment - Additional information attached to a specific structure point.

      Entity_and_Attribute_Detail_Citation: none





          Contact_Organization: USGS Information Services

        Contact_Voice_Telephone: (303) 202-4200

        Contact_Voice_Telephone: 1-888-ASK-USGS

        Contact_Facsimile_Telephone: (303) 202-4695


    Resource_Description: Downloadable Data. Open-File Report (OFR) 95-50


      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 delivery, installation, operation, or support by USGS.

      Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.


    Metadata_Date: 20150101




          Contact_Organization: U.S. Geological Survey

          Contact_Person: Stephanie Dudash

        Contact_Position: GIS Specialist


          Address_Type: mailing address

          Address: 520 N. Park Ave., room 355

          City: Tucson

          State_or_Province: AZ

          Postal_Code: 85719

          Country: USA

        Contact_Voice_Telephone: none, please use email to contact

        Contact_Facsimile_Telephone: 520-670-5571


    Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

    Metadata_Standard_Version: FGDC-STD-001-1998

    Metadata_Time_Convention: local time

    Metadata_Access_Constraints: none

    Metadata_Use_Constraints: none