Identification_Information: Citation: Citation_Information: Originator: Douglas M. Morton and Michael P. Kennedy Publication_Date: 2005 Title: Preliminary Geologic Map of the Sage 7.5' Quadrangle, Riverside County, 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 2005-1285 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2005/1285 Description: Abstract: The Sage 7.5' quadrangle is located at the southern part of the Perris block of the Peninsular Ranges batholith, a relatively stable area located between the Elsinore and San Jacinto Fault Zones (Woodford and others, 1971). The geology of the quadrangle is dominated by parts of two large tonalite plutons, the tonalite of the Coahuila Valley pluton of Sharp (1967), and the tonalite of the Tucalota Valley pluton. Most of the tonalite in both plutons is massive or very slightly foliated and contains scattered ellipsoidal mafic inclusions. In the northwestern corner of the quadrangle is an intimate mixture of schist, gneiss and heterogeneous granitic rocks. Some of the granitic rocks are white mica-bearing monzogranite. In most of the area the Tucalota Valley pluton is separated from the Coahuila Valley pluton by a broad septum of gneiss and schist. The metamorphic rocks consist of foliated biotite schist, biotite gneiss, and impure quartzite. Antatectic gneiss is common. Hornblende gabbro invaded by a variety of heterogeneous grantitic rocks occurs in the southern part of the quadrangle. The Temecula Arkose (Mann, 1955) is mainly pale greenish-yellow, medium- to coarse-grained, indurated sandstone. It includes thin discontinuous beds of tuffaceous sandstone, siltstone, and claystone, and some pebble and conglomerate beds having locally derived clasts. Kennedy (1977) assigned the unit a late Pliocene Blancan IV-V mammal age (2.2 to 2.8 Ma) based on vertebrate assemblages collected east of quadrangle. Assemblages include Nannippus, Hypolagus, Tetrameryx, Equus, and Odocoileus (Golz and others, 1977). Later work established the first occurrence of Tetrameryx as Irvingtonian I rather than late Blancan (Woodburne, 1987), placing the Temecula Arkose age nearer 1.9 Ma (late Pliocene) than 2.2 Ma. A microtine fauna from this unit in the Radec area, about five miles east of Santa Ana quadrangle, is considered to have an age of 4.6 Ma (Blancan I) (Repenning, 1987). Thickness of the Temecula Arkose ranges from 90 to over 550 m (Kennedy, 1977). A thin, narrow outcrop of vesicular basalt, the Miocene basalt of Temecula area (Morton, 2004), occurs in the southwest corner of the quadrangle. A large landslide, the Oak Mountain landslide (Hart, 1991) consists of gabbro fragments largely resting on the Pliocene Temecula Arkose. Major drainages, such as Tucalota Creek, Lewis Valley, and Weber Valley, contain both dissected Pleistocene alluvial deposits and essentially undissected Holocene alluvial deposits. Some of the drainages, such as Glenoak Valley, contain mainly Holocene alluvial deposits. Purpose: The data set for the Sage 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: 2005 Currentness_Reference: New data Status: Progress: Complete Maintenance_and_Update_Frequency: As Needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -117.0000901 East_Bounding_Coordinate: -116.8749099 North_Bounding_Coordinate: 33.62499995 South_Bounding_Coordinate: 33.49998424 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: geologic map Theme_Keyword: geology Theme_Keyword: bedrock geology Place: Place_Keyword_Thesaurus: None Place_Keyword: California Place_Keyword: Riverside County Place_Keyword: Sage quadrangle Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: granitic rocks Stratum_Keyword: gabbro Stratum_Keyword: schist Stratum_Keyword: granodiorite Stratum_Keyword: alluvial fan Access_Constraints: None Use_Constraints: The Sage 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Sage 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: (951) 276-6397 Contact_Facsimile_Telephone: (951) 276-6295 Contact_Electronic_Mail_Address: scamp@usgs.gov Data_Set_Credit: Geologic mapping and digital preparation of this report were sponsored by (1) the Southern California Areal Mapping Project (SCAMP) and (2) the California Geological Survey. Native_Data_Set_Environment: SunOS, 5.8, sun4m UNIX ARC/INFO version 8.2 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Geologic-map units in the Sage 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 Sage 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 and M.P. Kennedy). Process_Date: 1998, 2003 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 (A.E. Mertz and K.R. Bovard). Process_Date: 2003-2004 Process_Step: Process_Description: Description of map units and correlation of map units (K.R. Bovard and F.K. Miller). Process_Date: 2004 Process_Step: Process_Description: First draft of metadata created by kbovard using FGDCMETA.AML ver. 1.2 05/14/98 on ARC/INFO data set /scamp31/kbovard/sage1_geo Process_Date: 20041115 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: 244 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 827 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 245 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Polyconic Polyconic: Longitude_of_Central_Meridian: -116.9375 Latitude_of_Projection_Origin: 33.5 False_Easting: 0.00000 False_Northing: 0.00000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.0 Ordinate_Resolution: 1.0 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 Sage 7.5' quadrangle comprises four ARC/INFO coverages, of which two contain geologic data, and two contain cartographic features: sage1_geo (geology), sage1_str (structural data), sage1_arw (landslide arrows), and sage1_ano (annotation and leaders). Geologic data represented by line entities and the polygons they delineate are contained in the coverage SAGE1_GEO. For display purposes, the annotation coverage contains two annotation subclasses: anno.geo contains unit labels and anno.fault contains fault names. Geological point data includes site-specific information describing the types and the orientation of foliation, joints and lineations. Annotation is respective dip and plunge values associated with individual point data. Entity_and_Attribute_Detail_Citation: none Detailed_Description: Entity_Type: Entity_Type_Label: sage1_geo.pat Entity_Type_Definition: Geologic units (LABL) and their corresponding names (NAME) identified in the Sage 7.5' quadrangle Attribute: Attribute_Label: LABL Attribute_Definition: geologic map unit label, in plain text Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qw Enumerated_Domain_Value_Definition: Wash deposits Enumerated_Domain: Enumerated_Domain_Value: Qc Enumerated_Domain_Value_Definition: Colluvial deposits Enumerated_Domain: Enumerated_Domain_Value: Qls Enumerated_Domain_Value_Definition: Landslide deposits undivided Enumerated_Domain: Enumerated_Domain_Value: Qyf Enumerated_Domain_Value_Definition: Young alluvial fan deposits Enumerated_Domain: Enumerated_Domain_Value: Qya Enumerated_Domain_Value_Definition: Young alluvial channel deposits Enumerated_Domain: Enumerated_Domain_Value: Qyls Enumerated_Domain_Value_Definition: Young landslide deposits Enumerated_Domain: Enumerated_Domain_Value: Qof Enumerated_Domain_Value_Definition: Old alluvial fan deposits Enumerated_Domain: Enumerated_Domain_Value: Qoa Enumerated_Domain_Value_Definition: Old axial channel deposits Enumerated_Domain: Enumerated_Domain_Value: Qoagb Enumerated_Domain_Value_Definition: Old axial channel deposits containing gabbro clasts Enumerated_Domain: Enumerated_Domain_Value: Qoc Enumerated_Domain_Value_Definition: Old colluvial deposits Enumerated_Domain: Enumerated_Domain_Value: Qols Enumerated_Domain_Value_Definition: Old landslide deposits Enumerated_Domain: Enumerated_Domain_Value: Tvt Enumerated_Domain_Value_Definition: Basalt of Temecula area Enumerated_Domain: Enumerated_Domain_Value: Tta Enumerated_Domain_Value_Definition: Temecula Arkose Enumerated_Domain: Enumerated_Domain_Value: Ktv Enumerated_Domain_Value_Definition: Tonalite of the Tucalota Valley pluton Enumerated_Domain: Enumerated_Domain_Value: Kcv Enumerated_Domain_Value_Definition: Tonalite of the Coahuila Valley pluton of Sharp 1967 Enumerated_Domain: Enumerated_Domain_Value: Kgd Enumerated_Domain_Value_Definition: Granodiorite of the Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: Khg Enumerated_Domain_Value_Definition: Heterogeneous granitic rocks of the Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: Kgb Enumerated_Domain_Value_Definition: Gabbro of the Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: KgMz Enumerated_Domain_Value_Definition: Intermixed Mesozoic schist and Cretaceous granitic rocks Enumerated_Domain: Enumerated_Domain_Value: Trs Enumerated_Domain_Value_Definition: Schist Enumerated_Domain: Enumerated_Domain_Value: Trgn Enumerated_Domain_Value_Definition: Biotite and gneiss schist Attribute: Attribute_Label: PLABL Attribute_Definition: geologic map unit label, in coded text, used for plotting special characters contained in the geofont.txt textset (the geofont.txt textset must be used for these characters to be displayed correctly) Attribute: Attribute_Label: SHD Attribute_Definition: Coded integer value that relates units to cartographic shades in shadeset wpgcmykg.shd Attribute: Attribute_Label: SHDFIL Attribute_Definition: Coded integer value that relates units to cartographic patterns in shadeset geoscamp2.shd Detailed_Description: Entity_Type: Entity_Type_Label: sage1_geo.aat Entity_Type_Definition: Line types (LTYPE), and numbers corresponding to line symbols (L-SYMB) used for plotting contacts, faults, etc. identified in the Sage 7.5' quadrangle Attribute: Attribute_Label: LTYPE Attribute_Definition: Description of types of lines on the geologic map (contact, fault, dike). Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain: Enumerated_Domain_Value: contact, approx. located Enumerated_Domain: Enumerated_Domain_Value: fault, certain Enumerated_Domain: Enumerated_Domain_Value: fault, approx. located Enumerated_Domain: Enumerated_Domain_Value: fault, concealed Enumerated_Domain: Enumerated_Domain_Value: quartz veins Enumerated_Domain: Enumerated_Domain_Value: scratch boundary Enumerated_Domain: Enumerated_Domain_Value: landslide scarp, certain Enumerated_Domain: Enumerated_Domain_Value: map boundary Attribute: Attribute_Label: L-SYMB Attribute_Definition: Coded integer value that relates line to cartographic line symbol in lineset geoscamp2.lin Detailed_Description: Entity_Type: Entity_Type_Label: sage1_str.pat Entity_Type_Definition: Geological point data includes site-specific information describing the types and the orientation of foliation, joints, and lineations. Attribute: Attribute_Label: PTTYPE Attribute_Definition: describes type of point data (foliation, joints, lineations) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: metamorphic foliation Enumerated_Domain: Enumerated_Domain_Value: vertical metamorphic foliation Attribute: Attribute_Label: PT-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: sage1_ano.aat Entity_Type_Definition: annotation leaders Attribute: Attribute_Label: LTYPE Attribute_Definition: Description of type of line in the annotation coverage Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: leader Attribute: Attribute_Label: L-SYMB Attribute_Definition: Coded integer value (1) that relates arcs to cartographic line symbol in lineset geoscamp2.lin Detailed_Description: Entity_Type: Entity_Type_Label: sage1_arw.aat Entity_Type_Definition: Line types (LTYPE), and numbers corresponding to line symbols (L-SYMB) used for plotting landslide arrows Attribute: Attribute_Label: LTYPE Attribute_Definition: Description of type of line in the landslide arrow coverage Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: landslide arrow 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_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 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 Sage 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: 20041115 Metadata_Review_Date: 20041122 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Kelly R. Bovard 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: (951) 276-6397 Contact_Facsimile_Telephone: (951) 276-6295 Contact_Electronic_Mail_Address: kbovard@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