Identification_Information:
Citation:
Citation_Information:
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_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 95-50
Description:
Abstract:
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.
Supplemental_Information:
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 (MorenaRes.style) 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_Fault_anno
MorRes_Geolines *
MorRes_Geopolys *
MorRes_Inclination_anno
MorRes_Leaderlines
MorRes_Mapunit_anno
MorRes_Strucpoints *
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1975
Ending_Date: 1981
Currentness_Reference: period of geologic data collection
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -116.626373
East_Bounding_Coordinate: -116.500154
North_Bounding_Coordinate: 32.750488
South_Bounding_Coordinate: 32.624625
Keywords:
Theme:
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:
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:
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:
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:
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Robert E. Powell
Contact_Organization: U.S.Geological Survey, Geology and Geophysics Science Center
Contact_Position: Project geologist
Contact_Address:
Address_Type: mailing address
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
Contact_Electronic_Mail_Address: rpowell@usgs.gov
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 10.2.2.3552
Data_Quality_Information:
Attribute_Accuracy:
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.
Lineage:
Process_Step:
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_Step:
Process_Description: Mylar base scanned and registered to UTM zone 11, NAD 1927 projection/datum.
Process_Date: 2009
Process_Step:
Process_Description: Geologic features digitized and attributed in an ESRI ArcGIS 9.3 Personal Geodatabase.
Process_Date: 2009-2011
Process_Step:
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_Step:
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_Step:
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
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 3
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 417
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 452
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 167
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 9
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 78
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 178
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 306
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: NAD 1983 UTM Zone 11N
Transverse_Mercator:
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_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.0001
Ordinate_Resolution: 0.0001
Planar_Distance_Units: meter
Geodetic_Model:
Horizontal_Datum_Name: D North American 1983
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
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 MorenaRes.style.
Symazim - The angular value by which the cartographic symbol was rotated to match the digitizing source map.
Entity_and_Attribute_Detail_Citation: none
Overview_Description:
Entity_and_Attribute_Overview:
Dataset: MorRes_Fault_anno
Dataset Definition: Fault names annotation for map display
Entity_and_Attribute_Detail_Citation: none
Overview_Description:
Entity_and_Attribute_Overview:
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 MorenaRes.style.
Name - Fault name if so assigned.
Entity_and_Attribute_Detail_Citation: none
Overview_Description:
Entity_and_Attribute_Overview:
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
Overview_Description:
Entity_and_Attribute_Overview:
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
Overview_Description:
Entity_and_Attribute_Overview:
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
Overview_Description:
Entity_and_Attribute_Overview:
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
Overview_Description:
Entity_and_Attribute_Overview:
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 MorenaRes.style.
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
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USGS Information Services
Contact_Voice_Telephone: (303) 202-4200
Contact_Voice_Telephone: 1-888-ASK-USGS
Contact_Facsimile_Telephone: (303) 202-4695
Contact_Electronic_Mail_Address: infoservices@usgs.gov
Resource_Description: Downloadable Data. Open-File Report (OFR) 95-50
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 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_Reference_Information:
Metadata_Date: 20150101
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Stephanie Dudash
Contact_Position: GIS Specialist
Contact_Address:
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
Contact_Electronic_Mail_Address: sdudash@usgs.gov
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