GEOLOGIC MAP OF THE ROMOLAND 7.5' QUADRANGLE, RIVERSIDE COUNTY, CALIFORNIA By Douglas M. Morton1 Digital preparation by Kelly R. Bovard1 and Gregory Morton2 Prepared in cooperation with CALIFORNIA GEOLOGICAL SURVEY Open-File Report OF 03-102 2003 Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This database, identified as "Geologic map of the Romoland 7.5' quadrangle, Riverside County, California" has been approved for release and publication by the Director of the USGS. U.S. DEPARTMENT OF INTERIOR U.S. GEOLOGICAL SURVEY 1 U.S. Geological Survey Department of Earth Sciences University of California Riverside CA 92521 2 Department of Earth Sciences University of California Riverside CA 92521 TABLE OF CONTENTS Introduction General How to obtain paper plots Database contents Data package Plot package Other files Software utilities How to obtain the digital files Digital databases Postscript plot files Portable Document Format (.pdf) files How to extract the geologic map database from the tar files Digital database Postscript plot files How to convert the ARC/INFO interchange (export) files Digital geologic map specifications Digital compilation Base map Spatial resolution Map accuracy standards Faults and landslides Database specifics General Lines Polygons Points References Metadata INTRODUCTION General Open-File Report 03-102 contains a digital geologic map database of the Romoland 7.5' quadrangle, Riverside County, California that includes: 1. ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map. 2. A Postscript file to plot the geologic map on a topographic base, and containing a Correlation of Map Units diagram (CMU), a Description of Map Units (DMU), and an index map. 3. Portable Document Format (.pdf) files of: a. This Readme; includes in Appendix I, data contained in rom_met.txt b. The same graphic as plotted in 2 above. Test plots have not produced precise 1:24,000-scale map sheets. Adobe Acrobat page size setting influences map scale. The Correlation of Map Units and Description of Map Units is in the editorial format of USGS Geologic Investigations Series (I-series) maps but has not been edited to comply with I-map standards. Within the geologic map data package, map units are identified by standard geologic map criteria such as formation-name, age, and lithology. Where known, grain size is indicated on the map by a subscripted letter or letters following the unit symbols as follows: lg, large boulders; b, boulder; g, gravel; a, arenaceous; s, silt; c, clay; e.g. Qyfa is a predominantly young alluvial fan deposit that is arenaceous. Multiple letters are used for more specific identification or for mixed units, e.g., Qfysa is a silty sand. In some cases, mixed units are indicated by a compound symbol; e.g., Qyf2sc. Even though this is an Open-File Report and includes the standard USGS Open-File disclaimer, the report closely adheres to the stratigraphic nomenclature of the U.S. Geological Survey. Descriptions of units can be obtained by viewing or plotting the .pdf file (3b above) or plotting the postscript file (2 above). This Readme file describes the digital data, such as types and general contents of files making up the database, and includes information on how to extract and plot the map and accompanying graphic file. Metadata information can be accessed at http://geo-nsdi.er.usgs.gov/metadata/open-file/03-102 and is included in Appendix I of this Readme. HOW TO OBTAIN PAPER PLOTS For those having access to large-format plotters such as HP650C, HP755C, and HP2500C, plots may be made directly from the included plot file. DATABASE CONTENTS The files constituting the geologic map database of this Open-File Report are listed below along with the interchange files from which they were extracted. Data Package All files listed below are in a compressed tar file named rom.tar.gz (1.4 Mb); see section below titled, SOFTWARE UTILITES. ARC/INFO interchange files Romoland coverages Contains rom_geo.e00 rom_geo Contacts, faults, geologic unit labels rom_ano.e00 rom_ano Annotation subclasses: GEO (for plotting unit labels) PLACE (for plotting place names) Leaders rom_str.e00 rom_str Attitudes and their dip values. Dip values plotted as annotation. The directory, info/, is produced in the process of importing interchange files to ARC coverages in ARC/INFO. The rom (Romoland) info/ directory contains: Feature Attribute Tables Polygon attribute table rom_geo.pat Arc attribute table rom_geo.aat rom_ano.aat Point attribute table rom_str.pat Annotation attribute table rom_ano.tatgeo rom_ano.tatplace Raster file Resultant image Contains rom.tif Romoland base map Topographic base from 500 dpi scan of USGS Romoland 7.5' quadrangle, 1953 Plot Package PostScript plot files of the geologic map and explanation; please see section below titled, SOFTWARE UTILITIES for additional information. Compressed file Resultant image Contains rom_map.ps.gz rom_map.ps PostScript plot file of geologic map and CMU/DMU The Postscript file is compressed using winzip. The uncompressed Postscript file rom_map.ps will plot a 1:24,000 scale, full color geologic map of the Romoland quadrangle on the topographic base. A detailed CMU and DMU are included on the sheet. The sheet is in the editorial format of the U.S. Geological Survey's Geologic Investigations (I) map series, and is approximately 46 X 32 inches in size. The map sheet has been successfully plotted on Hewlett-Packard large-format plotters, models HP650C, HP755C, and HP2500C. Symbols Package Files in the plot package have been prepared to produce optimum plots using the shade, line, and marker sets listed below; these symbol sets and supporting fonts are included in a compressed tar file named symbols.tar.gz (0.04 Mb); see section below titled SOFTWARE UTILITIES. geoSCAMP2.lin Lineset geoSCAMP2.mrk Markerset for points alc1.shd Colors geology2.shd Pattern fills fnt026 Font required for geoSCAMP2.lin fnt037 Font required for geoSCAMP2.mrk fnt035 Font required for geology2.shd Special geologic characters used in unit designations are from the Geoage font group and may be obtained at the following web site: Server: onyx.wr.usgs.gov UserID: anonymous Password: Your e-mail address Directory: pub/wpg/supplies/geoage_1.1 pub/wpg/supplies/geoage_1.2 Other files README.pdf This document rom_map.pdf Pdf plot file of geologic map and CMU/DMU SOFTWARE UTILITIES Files which have .gz file extension were compressed using gzip. Gzip utilities are available free of charge via the Internet at the gzip home page, http://www.gzip.org. Files with a .zip file extension were compressed using WinZip, available at http://www.winzip.com. The data package and symbols package are additionally bundled into a single tar (tape archive) file. The individual files must be extracted using a tar utility, available free of charge via the Internet through links on the Common Internet File Formats page, http://www.matisse.net/files/format.html. One such utility is WinZip, available at http://www.winzip.com. HOW TO OBTAIN THE DIGITAL FILES The export files, and subsequently the data and plot files, constituting the geologic map database of this Open-File Map may be obtained in two ways, both over the Internet. 1. The files can be obtained via the Web from Western Region Geologic Information Server. Go to the web page at http://geopubs.wr.usgs.gov/open-file/of03-102 and follow the directions to download the files. 2. The files can also be obtained by anonymous ftp over the Internet from wrgis.wr.usgs.gov. The files are located in the directory /pub/open-file/. Be sure to use binary transfer mode or ASCII mode for individual .e00 (ARC interchange file format) files. HOW TO EXTRACT THE GEOLOGIC MAP DATABASE FROM THE TAR FILE Digital database After downloading the files, they must be uncompressed using a gzip utility such as gzip itself or WinZip. The data files must then be extracted using a tar utility or Winzip. This process will create a directory, rom/, that will contain the ARC/INFO interchange files and supporting files. The directory should contain the following files: rom/ rom_geo.e00 rom_str.e00 rom_ano.e00 rom.tif The symbols.tar.gz file is imported using the same methods as for the rom.tar.gz file. It will create a directory, symbols/ that will contain the following files: geoSCAMP2.lin geoSCAMP2.mrk alc1.shd geology2.shd fnt026 fnt037 fnt035 The following are not included in the database tar file, and are downloaded separately. rom_map.ps.gz README.pdf rom_map.pdf Postscript plot files Make a 7.7 MB uncompressed file, rom_map.ps (plot of complete map), by typing gzip -d rom_map.ps.gz (or use gzip utility of choice). Portable Document Format (.pdf) files PDF files are not stored as gzip files. They are accessed using Adobe Acrobat Reader software, available free from the Adobe website http://www.adobe.com. Follow instructions at the website to download and install the software. Acrobat Reader contains an on-line manual and tutorial. HOW TO CONVERT THE ARC/INFO INTERCHANGE (EXPORT) FILES The ARC interchange (.e00) files are converted to ARC coverages using the ARC command IMPORT. ARC interchange files can also be read by some other Geographic Information Systems, including ArcView (ESRI) and MapInfo (http://www.mapinfo.com), (Environmental Systems Research Institute, Inc., 1998). Please consult your GIS documentation to see if you can use ARC interchange files and the procedure to import them. DIGITAL GEOLOGIC MAP SPECIFICATIONS Digital compilation The geologic map information was hand digitized from a base-stable original (ink on a greenline) of the geologic map at 1:24,000 scale. Digital tics were placed by hand at latitude/longitude intersections. The lines, points, and polygons were edited using standard ARC/INFO commands, and in some places, interactively by hand using graphical user interface ALACARTE (Fitzgibbon, 1991, Fitzgibbon and Wentworth, 1991, Wentworth and Fitzgibbon, 1991). Digitization and editing artifacts significant enough to display at a scale of 1:24,000 were corrected. Base map The base map image (rom.tif) was prepared by scanning a scale-stable clear film of the U.S. Geological Survey, 1:24,000 Romoland 7.5' quadrangle (1953) topographic map. Scanning was done using an Anatech Eagle 4080 monochrome 800 dpi scanner; at a resolution of 500 dpi. The raster scan was converted to a monochromatic image in ARC/INFO, and registered and rectified to the Romoland 7.5' quadrangle. No elements of the base layer are attributed. The base map is provided for reference only. Spatial resolution 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 edited at a scale of 1:24,000 means that higher resolution information is not generally present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine-scale irregularities above the intended resolution of the database. Similarly, although higher resolution data is incorporated at a few places, the resolution of the combined output will be limited by the lower resolution data. Map accuracy standards Until uniform National geologic map standards are developed and adopted, lines and points on SCAMP 1:24,000 scale geologic maps that are located to within 15 meters, relative to accurately located features on the base map, are considered to meet map accuracy standards. Dashed lines, indicated in the database as approximately located or inferred, are generally located within 30 meters, relative to accurately located features on the base map. Faults and landslides This database is sufficiently detailed to identify and characterize many actual and potential geologic hazards represented by faults and landslides, but it is not sufficiently detailed for site-specific determinations. Faults shown do not take the place of fault rupture hazard zones designated by the California State Geologist (see Hart, 1998). Database specifics General--The map database consists of ARC/INFO format coverages which are stored in polyconic projection (Table 1), and a series of data tables. Digital tics define a 2.5 minute grid of latitude and longitude in the geologic coverages corresponding to the 2.5 minute tic grid on the topographic base map. Table 1 --- Map Projection Projection Polyconic Datum NAD27 Zunits No Units Meters Spheroid Clark 1866 X shift 0.000000000 Y shift 0.000000000 Parameters -117 11 15.000 longitude of central meridian 33 37 30.00 latitude of projections origin 0.00000 false easting (meters) 0.00000 false northing (meters) The content of the geologic database can be described in terms of feature classes that include lines, points, and areas that compose the map. See the metadata text file (Appendix I) for detailed descriptions. Lines - Lines are recorded as strings of arcs and are described in an arc attribute (.aat) table. Complete lists of the line types (LTYPE) used in the quadrangle are available in Appendix I. They represent contacts and faults, which define the boundaries of map units and map boundaries. Polygons --- Geologic map units (polygons) are described in the polygon attribute (.pat) table (details in Appendix I). For traditional descriptions of the map units, see the Portable Document Format file rom_map.pdf or the Postscript map plot, rom_map.ps. A list of all map units in the database is given in Appendix I. Points - Point information (attitudes of planar and linear features) is recorded as coordinate and related information. Complete lists of the point types (PTTYPE) used in the point coverage are available in Appendix I. REFERENCES Environmental Systems Research Institute, Inc, 1991, ARC/INFO command references 6.0: Proprietary software manual Fitzgibbon, T.T., 1991, ALACARTE installation and system manual (version 1.0): U.S. Geological Survey, Open-File Report 91-587B Fitzgibbon, T.T., and Wentworth, C.M., 1991, ALACARTE user interface - AML code and demonstration Maps (version 1.0): U.S. Geological Survey, Open-File Report 91-587A Wentworth, C.M., and Fitzgibbon, T.T., 1991, ALACARTE user manual (version 1.0): U.S. Geological Survey Open-File Report 91-587C APPENDIX I (original metadata text) Identification_Information: Citation: Citation_Information: Originator: Douglas M. Morton Publication_Date: 2003 Title: Geologic Map of the Romoland 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 OF 03-102 Publication_Information: Publication_Place: Menlo Park, California Publisher: U.S. Geological Survey Online_Linkage: URL:http://geopubs.wr.usgs.gov/open-file/of03-102 Description: Abstract: This data set maps and describes the geology of the Romoland 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. The Romoland quadrangle is located in the northern part of the Peninsular Ranges Province within the central part of the Perris block, a relatively stable, rectangular in plan view, area located between the Elsinore and San Jacinto fault zones. The quadrangle is underlain by pre-Cretaceous basement rocks that are intruded by plutonic rocks of the composite, Cretaceous Peninsular Ranges batholith. Within the quadrangle, the batholith is represented by a wide variety of granitic rocks, ranging from granite to gabbro. Segments of two major plutonic complexes are within the quadrangle. In the southern part of the quadrangle is the northern segment of the Paloma Valley ring complex, which is elliptical in plan view and consists of an older ring-dike with two subsidiary short-arced dikes that were emplaced into gabbro by magmatic stoping. Small to large stoped blocks of gabbro are common within the ring-dikes. A younger ring-set of hundreds of thin pegmatite dikes occur largely within the central part of the complex. These pegmatite dikes were emplaced into a domal fracture system, apparently produced by cauldron subsidence, and include in the center of the complex a number of flat-floored granophyre bodies. The granophyre is interpreted to be the result of pressure quenching of pegmatite magma. Scattered exposures of the upper shallower part of the Domenigoni Valley pluton occur throughout the central and eastern part of the quadrangle. This pluton consists of massive biotite-hornblende granodiorite and tonalite. Common to abundant, equant-shaped, mafic inclusions occur throughout the pluton except in the outermost part which is devoid of all inclusions. The pluton was passively emplaced by piecemeal stoping of a variety of older rocks producing sharp contacts with the country rock (near center of section 23 west of Menifee Road). Rock of the pluton permeates much of the impure quartzite located on the east side of Quail Valley, which represents host rocks immediately above the roof of the pluton. Associated with this pluton is a swarm of latite dikes; the main part of which occurs to the east in the Winchester 7.5' quadrangle. Most latite dikes, that occur in both the pluton and adjacent metamorphic rocks, are notably foliated and most have a well developed lineation defined by oriented biotite and (or) hornblende crystals. In the pluton, emplacement of these dikes was controlled by northwest striking joints; in the metamorphic rocks the dikes were emplaced along foliation planes. Prebatholitic rocks of probable Mesozoic age include a wide variety of sedimentary rocks of greenschist or lower metamorphic grade. Common lithologies include phyllite, lithic graywacke, impure quartzite, metaarkose, and interlayered quartzite and phyllite. Most of the layering and foliation in the metamorphic rocks is structurally transposed layering and is not relic bedding. An exception is relic cross bedding, which is found only locally. Valley areas in the quadrangle are underlain primarily by coalesced Pleistocene alluvial fan deposits. The flood plain of Salt Creek (not named on topographic base map), a major tributary of the San Jacinto River, bisects the western part of the quadrangle, forming the eastern arm of Railroad Canyon Reservoir. The geologic map data base contains original U.S. Geological Survey data generated by detailed field observation recorded on 1:24,000 scale aerial photographs. The map was created by transferring lines from the aerial photographs to a 1:24,000 scale topographic base. The map was digitized and lines, points, and polygons were subsequently edited using standard ARC/INFO commands. Digitizing and editing artifacts significant enough to display at a scale of 1:24,000 were corrected. Within the database, geologic contacts are represented as lines (arcs), geologic units are polygons, and site-specific data as points. Polygon, arc, and point attribute tables (.pat, .aat, and .pat, respectively) uniquely identify each geologic datum. Purpose: The data set for the Romoland 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: 2003 Currentness_Reference: New data Status: Progress: Complete Maintenance_and_Update_Frequency: As Needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -117.25009064 East_Bounding_Coordinate: -117.12490947 North_Bounding_Coordinate: 33.75000075 South_Bounding_Coordinate: 33.62498327 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geologic map Theme_Keyword: geology Theme_Keyword: bedrock geology Theme_Keyword: alluvial geology Place: Place_Keyword_Thesaurus: none Place_Keyword: California Place_Keyword: Riverside County Place_Keyword: Romoland 7.5' quadrangle Stratum: Stratum_Keyword_Thesaurus: none Stratum_Keyword: Cretaceous tonalite and granodiorite Stratum_Keyword: Mesozoic metamorphics Stratum_Keyword: Quaternary alluvium Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: Cretaceous Temporal_Keyword: Mesozoic Temporal_Keyword: Quaternary Access_Constraints: none Use_Constraints: The Romoland 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Romoland 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: (909) 276-6397 Contact_Facsimile_Telephone: (909) 276-6295 Contact_Electronic_Mail_Address: scamp@usgs.gov 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 Geological Survey, 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: USGS OF 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 Romoland 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 Romoland 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: 1991; 1995-96 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 (K.R. Bovard and G. Morton). Process_Date: 1999-2001 Process_Step: Process_Description: Description of map units and correlation of map units (K. Corriea). Process_Date: 2002 Process_Step: Process_Description: First draft of metadata created by K.R. Bovard using FGDCMETA.AML ver. 1.2 05/14/98 on ARC/INFO data set /scamp31/kbovard/romoland/rom_geo Process_Date: 20020218 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: 255 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 729 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 256 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Polyconic Polyconic: Latitude_of_Projection_Origin: 33.625 Longitude_of_Central_Meridian: -117.1875 False_Easting: 0.00000 False_Northing: 0.00000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.000396490097 Ordinate_Resolution: 1.000396490097 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 Romoland 7.5' quadrangle comprises three ARC/INFO coverages, of which two contain geologic data, and one contains cartographic features: rom_geo (geology), rom_str (structural data), and rom_ano (annotation and leaders). Geologic data represented by line entities and the polygons they delineate are contained in the coverage ROM_GEO. For display purposes, the annotation coverage contains two annotation subclasses: anno.geo contains unit labels, anno.place contains place 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. ROM_GEO.PAT: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME 1 AREA 4 12 F 3 5 PERIMETER 4 12 F 3 9 ROM_GEO# 4 5 B - 13 ROM_GEO-ID 4 5 B - 17 LABL 35 35 C - 52 SHD 3 3 I - 55 PLABL 35 35 C - 90 SHDFIL 3 3 I - 93 NAME 200 200 C - ROM_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 4 12 F 3 21 ROM_GEO# 4 5 B - 25 ROM_GEO-ID 4 5 B - 29 LTYPE 45 45 C - 64 L-SYMB 3 3 I - Entity_and_Attribute_Detail_Citation: none Detailed_Description: Entity_Type: Entity_Type_Label: rom_geo.pat Entity_Type_Definition: Geologic units (LABL) and thier corresponding names (NAME) identified in the Romoland 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: Very young wash deposits Enumerated_Domain: Enumerated_Domain_Value: Qv Enumerated_Domain_Value_Definition: Very young alluvial valley deposits 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: Qyv Enumerated_Domain_Value_Definition: Young alluvial valley 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 alluvial channel deposits Enumerated_Domain: Enumerated_Domain_Value: Qvof Enumerated_Domain_Value_Definition: Very old alluvial fan deposits Enumerated_Domain: Enumerated_Domain_Value: Qvoa Enumerated_Domain_Value_Definition: Very old alluvial channel deposits Enumerated_Domain: Enumerated_Domain_Value: Kdvg Enumerated_Domain_Value_Definition: Granodiorite to tonalite of Domenigoni Valley pluton Enumerated_Domain: Enumerated_Domain_Value: Kgbf Enumerated_Domain_Value_Definition: Fine grained hornblende gabbro, Railroad Canyon area Enumerated_Domain: Enumerated_Domain_Value: Kpvgr Enumerated_Domain_Value_Definition: Granophyre of Paloma Valley Ring Complex Enumerated_Domain: Enumerated_Domain_Value: Kpvp Enumerated_Domain_Value_Definition: Pegmatitic dikes of Paloma Valley Ring Complex Enumerated_Domain: Enumerated_Domain_Value: Kpvg Enumerated_Domain_Value_Definition: Monzogranite to granodiorite of Paloma Valley Ring Complex Enumerated_Domain: Enumerated_Domain_Value: Kpvt Enumerated_Domain_Value_Definition: Tonalite of Paloma Valley Ring Complex Enumerated_Domain: Enumerated_Domain_Value: Kpvgb Enumerated_Domain_Value_Definition: Granodiorite and gabbro, undivided of Paloma Valley Ring Complex Enumerated_Domain: Enumerated_Domain_Value: Kg Enumerated_Domain_Value_Definition: Granite of the Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: Kgd Enumerated_Domain_Value_Definition: Granodiorite, undifferentiated of Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: Kt Enumerated_Domain_Value_Definition: Tonalite, undifferentiated of Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: Kd Enumerated_Domain_Value_Definition: Diorite, undifferentiated of Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: Kgb Enumerated_Domain_Value_Definition: Gabbro of Peninsular Ranges batholith Enumerated_Domain: Enumerated_Domain_Value: Mzu Enumerated_Domain_Value_Definition: Metasedimentary rocks, undifferentiated Enumerated_Domain: Enumerated_Domain_Value: Mzq Enumerated_Domain_Value_Definition: Quartz-rich rocks Enumerated_Domain: Enumerated_Domain_Value: Mzqg Enumerated_Domain_Value_Definition: Intermixed quartzite and graywacke Enumerated_Domain: Enumerated_Domain_Value: Mzgp Enumerated_Domain_Value_Definition: Intermixed graywacke and phyllite Enumerated_Domain: Enumerated_Domain_Value: Mzp Enumerated_Domain_Value_Definition: Phyllite Enumerated_Domain: Enumerated_Domain_Value: Mzi Enumerated_Domain_Value_Definition: Interlayered phyllite (or schist) and quartzite Enumerated_Domain: Enumerated_Domain_Value: KgMz Enumerated_Domain_Value_Definition: Intermixed Mesozoic schist and Cretaceous granitic rocks 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 keystroke substitute characters, }, that call 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: rom_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, dike). Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: map boundary Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value: contact, approx. located Enumerated_Domain_Value: fault, certain Enumerated_Domain_Value: fault, approx. located Enumerated_Domain_Value: Kgbd, gabbroic dike Enumerated_Domain_Value: Kld, quartz latite dike Enumerated_Domain_Value: Kgbf, fine grained hornblende gabbroic dike Enumerated_Domain_Value: Kpvp, pegmatitic dike Enumerated_Domain_Value: water 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: rom_str.pat Entity_Type_Definition: Geological point data includes site-specific information describing the types and the orientation of foliation, joints, and lineations. One annotation subclass is included in the geologic points coverage, ROM_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 (foliation, joints, lineations) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: igneous foliation Enumerated_Domain_Value: vertical igneous foliation Enumerated_Domain_Value: igneous joint Enumerated_Domain_Value: vertical igneous joint Enumerated_Domain_Value: metamorphic foliation Enumerated_Domain_Value: vertical metamorphic foliation Enumerated_Domain_Value: minor metamorphic fold axis Enumerated_Domain_Value: vertical minor metamorphic fold axis Enumerated_Domain_Value: dip of dike, Kpvp Enumerated_Domain_Value: dip of dike, Kld 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: rom_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 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 Romoland 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: 20020218 Metadata_Review_Date: 20030125 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: (909) 276-6397 Contact_Facsimile_Telephone: (909) 276-6295 Contact_Electronic_Mail_Address: scamp@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: none 17