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Geologic Map of the Lake Mathews 7.5' Quadrangle, Riverside County, California

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Douglas M. Morton

Originator: F. Harold Weber, Jr.

Publication_Date: 2001

Title:

Geologic Map of the Lake Mathews 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: 01-479

Publication_Information:

Publication_Place: Menlo Park, California

Publisher: U.S. Geological Survey

Online_Linkage: <http://geopubs.wr.usgs.gov/open-file/of01-479/>

Description:

Abstract:

This data set maps and describes the geology of the Lake Mathews 7.5' quadrangle, Riverside County, 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.
All but the southeast corner of the Lake Mathews quadrangle is in the Perris block, a relatively stable, rectangular-in-plan area located between the Elsinore and San Jacinto fault zones in the northern Peninsular Ranges Province. In the southwest corner of the quadrangle, a small triangular-shaped area that is part of the Santa Ana Mountains structural block, is separated from the Perris block by a short segment of the Elsinore fault zone. The active Elsinore fault zone, a major component of the San Andreas fault system, consists of a series of en echelon northwest-striking right lateral faults located in a graben-like structure.
There is limited relief within the quadrangle because of the presence of two prominent erosion surfaces. The lower Perris surface (about 1,500 feet elevation) has low relief and dominates the physiography of the northern half of the quadrangle. This surface is discontinuously covered by coarse-grained, clastic, non-marine sedimentary rocks of the middle Miocene-age Lake Mathews Formation. A higher Gavilan-Lakeview surface (about 2,100 feet elevation) occurs in the eastern part of the quadrangle, and is locally covered by small exposures of fluvial conglomerate that contain exotic clasts of red rhyolite.
The Lake Mathews quadrangle is underlain almost entirely by Cretaceous and older basement rocks. Two different types of metamorphic rocks are exposed in the quadrangle. In the northeast is a northwest trending exposure of amphibolite grade biotite-bearing schist of probable Mesozoic age. This schist separates massive textured granitic rocks to the west from foliated and layered granitic rocks to the east. The large expanse of metamorphic rock between Temescal Wash and Lake Mathews is low metamorphic grade, typically siliceous, but highly variable in composition.
Cretaceous plutonic rocks in the quadrangle are part of the composite Peninsular Ranges batholith, and represent a wide variety of mafic to intermediate composition granitic rocks. Most are massive-textured with the exception of the crudely foliated biotite-hornblende tonalite of the Val Verde pluton in the northeast corner of the quadrangle. The Cajalco pluton, which consists of biotite monzogranite, granodiorite and lesser amounts of biotite-hornblende granodiorite, by far, accounts for most of the granitic rocks in the quadrangle. It is a shallow level pluton emplaced by magmatic stoping into largely intermediate composition volcanic and volcanoclastic rocks and metamorphic rocks in its western and southern extent and into gabbroic rocks in its northern extent. The pluton appears to be tilted up to the northeast with the texture of the rock changing from subporphyritic rock containing beta-quartz-appearing phenocrysts in the southwestern part of the pluton to coarser-grained hypautomorphic texture rock in the eastern part. Located in the upper part of the pluton and in overlying wall rock in the shallow western part of the pluton is widespread metasomatic tourmaline rock. Locally parts of the pluton have been completely replaced by tourmaline but more commonly tourmaline occurs in discrete thin zones, generally along joints. Some of the larger masses of tourmaline rock, locally termed tourmaline 'blowouts', contain cassiterite and sulfides. One large mass of cassiterite-bearing tourmaline rock supported a tin mining and smelting operation.
In the southeast corner of the quadrangle is the northwest part of the Gavilan ring complex. This shallow plutonic complex centered southeast of the quadrangle is predominantly tonalitic composition, characterized by the presence of hypersthene, which is rarely found in Peninsular Ranges batholithic rocks of intermediate composition.
Most of the southern part of the quadrangle is underlain by siliceous volcanic and volcanoclastic rocks considered to be coeval with the batholith and which are considered to represent the supra-part of the batholithic magmatism. These rocks generally range in composition from rhyolite to andesite, but latite is probably the predominate composition.
Paleocene continental rocks of the Silverado Formation occur within the Elsinore fault zone and nearby on the adjacent Perris block. Clay-rich parts of the Silverado Formation have been mined for industrial clay. Near Arlington Mountain, in the northwest part of the quadrangle, are two very small occurrences of conglomerate that consist of exotic welded-tuff clasts and a few exotic bedded quartzite clasts. Extensive Quaternary alluvial deposits are found along the south side of Lake Mathews and in the Temescal Valley along the Elsinore fault zone.

Purpose:

The data set for the Lake Mathews 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.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2001

Currentness_Reference: New data obtained

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As Needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -117.5000909

East_Bounding_Coordinate: -117.37490912

North_Bounding_Coordinate: 33.87500019

South_Bounding_Coordinate: 33.74997833

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: geologic map

Theme_Keyword: geology

Theme_Keyword: bedrock geology

Theme_Keyword: alluvial geology

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories

Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: California

Place_Keyword: Riverside County

Place_Keyword: Lake Mathews 7.5' quadrangle

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0

Place_Keyword: 06065 = Riverside

Stratum:

Stratum_Keyword_Thesaurus: none

Stratum_Keyword: Cretaceous tonalite and granodiorite

Stratum_Keyword: Quaternary deposits

Temporal:

Temporal_Keyword_Thesaurus: none

Temporal_Keyword: Cretaceous

Temporal_Keyword: Quaternary

Access_Constraints: none

Use_Constraints:

The Lake Mathews 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Lake Mathews 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, GEO-WRG-NGM

Contact_Address:

Address_Type: mailing address

Address: UC - Riverside

City: Riverside

State_or_Province: CA

Postal_Code: 92521

Country: USA

Contact_Voice_Telephone: 909-276-6397

Contact_Facsimile_Telephone: 909-276-6295

Contact_Electronic_Mail_Address: scamp@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: <http://geopubs.wr.usgs.gov/open-file/of01-479/images/lkm.jpg>

Browse_Graphic_File_Description:

Reduced-size image of the map, 278x453 pixels, 32-bit RGB true color, 43 kbytes.

Browse_Graphic_File_Type: JPEG

Browse_Graphic:

Browse_Graphic_File_Name: <http://geopubs.wr.usgs.gov/open-file/of01-479/lkm_map.pdf>

Browse_Graphic_File_Description: Printable map sheet, 1.4 megabytes

Browse_Graphic_File_Type: PDF

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: 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 Lake Mathews 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, lineation, 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 Lake Mathews 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: 1993-95

Process_Step:

Process_Description: Field mapping (F.H. Weber, Jr.).

Process_Date: 1976

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 (V.M. Diep and U. Edwards-Howells).

Process_Date: 1999-2001

Process_Step:

Process_Description:

Description of map units and correlation of map units (F.K. Miller).

Process_Date: 2001

Process_Step:

Process_Description:

Revision of description of map units and correlation of map units (Kelly Corriea).

Process_Date: 2001

Process_Step:

Process_Description:

First draft of metadata created by Michael J. Watson using FGDCMETA.AML ver. 1.2 05/14/98 on ARC/INFO data set /scamp26/mwatson/lkm_ofr/lkm_geo

Process_Date: 20011207

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: 281

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

Point_and_Vector_Object_Count: 703

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Point_and_Vector_Object_Count: 282

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Polyconic

Polyconic:

Latitude_of_Projection_Origin: 33.75

Longitude_of_Central_Meridian: -117.4375

False_Easting: 0.00000

False_Northing: 0.00000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 1.000373721122

Ordinate_Resolution: 1.000373721122

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 Lake Mathews 7.5' quadrangle comprises three ARC/INFO coverages, of which two contain geologic data, and one contains cartographic features: lkm_geo (geology), lkm_str (structural data), and lkm_ano (annotation and leaders).
Geologic data represented by line entities and the polygons they delineate are contained in the coverage LKM_GEO. For display purposes, the annotation coverage contains one annotation subclass: anno.geo contains unit labels.
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.

LKM_GEO.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
    1  AREA                   8    18     F      5
    9  PERIMETER              8    18     F      5
   17  LKM_GEO#               4     5     B      -
   21  LKM_GEO-ID             4     5     B      -
   25  LABL                  35    35     C      -
   60  PLABL                 35    35     C      -
   95  SHD                    3     3     I      -
   98  SHDFIL                 3     3     I      -
  101  NAME                 200   200     C      -

LKM_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                 8    18     F      5
   25  LKM_GEO#               4     5     B      -
   29  LKM_GEO-ID             4     5     B      -
   33  LTYPE                 60    60     C      -
   93  L-SYMB                 3     3     I      -

Entity_and_Attribute_Detail_Citation: <http://geopubs.wr.usgs.gov/open-file/of01-479/README.pdf>

Detailed_Description:

Entity_Type:

Entity_Type_Label: lkm_geo.pat

Entity_Type_Definition:

Geologic units (LABL) and their corresponding names (NAME) identified in the Lake Mathews 7.5' quadrangle

Attribute:

Attribute_Label: LABL

Attribute_Definition: geologic map unit label, in plain text

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kcg

Enumerated_Domain_Value_Definition: Monzogranite of Cajalco pluton

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kcgb

Enumerated_Domain_Value_Definition: Granodiorite and gabbro, undifferentiated of Cajalco pluton

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kcgd

Enumerated_Domain_Value_Definition: Granodiorite of Cajalco pluton

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kcgq

Enumerated_Domain_Value_Definition:

Granodiorite and quartz latite, undifferentiated of Cajalco pluton

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kct

Enumerated_Domain_Value_Definition: Tonalite of Cajalco pluton

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kcto

Enumerated_Domain_Value_Definition: Tourmalinized monzogranite and granodiorite

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kgb

Enumerated_Domain_Value_Definition: Gabbro

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kgt

Enumerated_Domain_Value_Definition: Massive textured tonalite of Gavilan ring complex

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kgtf

Enumerated_Domain_Value_Definition: Foliated tonalite of Gavilan ring complex

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kgu

Enumerated_Domain_Value_Definition: Granite, undifferentiated

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Khg

Enumerated_Domain_Value_Definition: Heterogeneous granitic rocks

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kt

Enumerated_Domain_Value_Definition: Tonalite, undifferentiated

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kvem

Enumerated_Domain_Value_Definition: Estelle Mountain volcanics of Herzig (1991)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kvr

Enumerated_Domain_Value_Definition: Rhyolite of Estelle Mountain volcanics of Herzig (1991)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kvs

Enumerated_Domain_Value_Definition:

Intermixed Estelle Mountain volcanics of Herzig (1991) and sedimentary rocks

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kvspi

Enumerated_Domain_Value_Definition: Intrusive rocks associated with Santiago Peak Volcanics

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Kvt

Enumerated_Domain_Value_Definition: Tonalite of Val Verde pluton

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Lake Mathews

Enumerated_Domain_Value_Definition: Lake Mathews

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Mzs

Enumerated_Domain_Value_Definition: Schist

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Mzu

Enumerated_Domain_Value_Definition: Mesozoic metasedimentary rocks, undifferentiated

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: QTt

Enumerated_Domain_Value_Definition: Conglomerate of Temescal Wash

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qaf

Enumerated_Domain_Value_Definition: Artificial fill

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qoa

Enumerated_Domain_Value_Definition: Old axial channel deposits

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qoaa

Enumerated_Domain_Value_Definition: Old axial channel deposits, arenaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qoag

Enumerated_Domain_Value_Definition: Old axial channel deposits, gravel

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qof

Enumerated_Domain_Value_Definition: Old alluvial fan deposits

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qofa

Enumerated_Domain_Value_Definition: Old alluvial fan deposits, arenaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qofg

Enumerated_Domain_Value_Definition: Old alluvial fan deposits, gravel

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qova

Enumerated_Domain_Value_Definition: Old alluvial valley deposits, arenaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qvoa

Enumerated_Domain_Value_Definition: Very old axial channel deposits

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qvoag

Enumerated_Domain_Value_Definition: Very old axial channel deposits, gravel

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qvof1g

Enumerated_Domain_Value_Definition: Very old alluvial fan deposits, unit 1, gravel

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qvofa

Enumerated_Domain_Value_Definition: Very old alluvial fan deposits, arenaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qvofg

Enumerated_Domain_Value_Definition: Very old alluvial fan deposits, gravel

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qyaa

Enumerated_Domain_Value_Definition: Young axial channel deposits, arenaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qyag

Enumerated_Domain_Value_Definition: Young axial channel deposits, gravel

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qyf

Enumerated_Domain_Value_Definition: Young alluvial fan deposits

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qyfa

Enumerated_Domain_Value_Definition: Young alluvial fan deposits, arenaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qyfg

Enumerated_Domain_Value_Definition: Young alluvial fan deposits, gravel

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Qyva

Enumerated_Domain_Value_Definition: Young alluvial valley deposits, arenaceous

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Tcga

Enumerated_Domain_Value_Definition: Conglomerate of Arlington Mountain

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Tcgr

Enumerated_Domain_Value_Definition: Rhyolite-clast conglomerate of Lake Mathews area

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Tlm

Enumerated_Domain_Value_Definition: Lake Mathews Formation

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Tlm?

Enumerated_Domain_Value_Definition: Lake Mathews Formation

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Tsi

Enumerated_Domain_Value_Definition: Silverado Formation

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 a keystroke substitute character, }, that calls 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: lkm_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: Kcto, zone of tourmalinized monzogranite and granodiorite

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: contact, certain

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: fault, approx. located

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: fault, certain

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: fault, concealed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: map boundary

Attribute:

Attribute_Label: L-SYMB

Attribute_Definition:

stores appropriate line symbol value from the lineset geoscamp2.lin

Detailed_Description:

Entity_Type:

Entity_Type_Label: lkm_str.pat

Entity_Type_Definition:

Geological point data includes site-specific information describing the types and the orientation of bedding, foliation, and lineations. One annotation subclass is included in the geologic points coverage, LKM_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:

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: lkm_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_Voice_Telephone: (303)202-4700

Contact_Facsimile_Telephone: (303)202-4693

Resource_Description: USGS Open-File Report 01-479

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 Lake Mathews 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).

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ArcInfo export

Format_Version_Number: 7.2.1

Format_Information_Content:

Geologic units and structural features, with TIFF image of base map

File_Decompression_Technique: tar and gzip

Transfer_Size: 1.8 megabytes

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://geopubs.wr.usgs.gov/open-file/of01-479/lkm.tar.gz>

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20011207

Metadata_Review_Date: 20020117

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
Department of Earth Sciences
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: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: none

Metadata_Use_Constraints: none