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Geologic Map of the Telegraph Peak 7.5' quadrangle, San Bernardino County, California

Metadata also available as - [Outline] - [Parseable text] - [DIF]

Frequently anticipated questions:

What does this data set describe?

Title:
Geologic Map of the Telegraph Peak 7.5' quadrangle, San Bernardino County, California
Abstract:
This data set maps and describes the geology of the Telegraph 7.5' quadrangle, San Bernardino County, California. Created using Environmental Systems Research Institute's ARC/INFO software, the data base consists of the following items: (1) a double precision map coverage containing geologic contacts and units, (2) a coverage containing site-specific structural data, (3) a coverage containing geologic-unit label leaders and their associated 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), an index map, a regional geologic and structure map, and a key for point and line symbols; (2) PDF files of this Readme (including the metadata file as an appendix), Description of Map Units (DMU), and the graphic produced by the PostScript plot file.
The Telegraph Peak quadrangle is located in the eastern San Gabriel Mountains part of the Transverse Ranges Province of southern California. The generally east-striking structural grain characteristic of the crystalline rocks of much of the San Gabriel Mountains is apparent, but not well developed in the Telegraph Peak quadrangle. Here, the east-striking structural grain is somewhat masked by the northwest-striking grain associated with the San Andreas Fault zone.
Faults within the quadrangle include northwest-striking, right-lateral strike-slip faults of the San Andreas system. The active San Andreas Fault, located in the northern part of the quadrangle, dominates the younger structural elements. North of the San Andreas Fault is the inactive Cajon Valley Fault that was probably an early strand of the San Andreas system. It was active during deposition of the middle Miocene Cajon Valley Formation. South of the San Andreas, the Punchbowl Fault, which is probably a long-abandoned segment of the San Andreas Fault (Matti and Morton, 1993), has a sinuous trace apparently due to compression in the eastern San Gabriel Mountains that post-dates displacement on the fault. The Punchbowl Fault separates two major subdivisions of the Mesozoic Pelona Schist and is left-laterally offset by a northeast-striking fault in the northwestern part of the quadrangle. Within the Punchbowl Fault zone is a thin layer of highly deformed basement rock, which is clearly not part of the Pelona Schist. To the southeast, in the Devore quadrangle, this included basement rock attains a thickness of several hundred feet. Along strike to the northwest, Tertiary sedimentary rocks are included within the fault zone. South of the Punchbowl Fault are several arcuate (in plan) faults that are part of an antiformal schuppen-like fault complex of the eastern San Gabriel Mountains. Most of these arcuate faults are reactivated and deformed older faults, and probably include the eastern part of the San Gabriel Fault.
The Vincent Thrust of late Cretaceous or early Tertiary age separates the Pelona Schist in the lower plate from a heterogeneous basement complex in the upper plate. Immediately above the Vincent Thrust is a variable thickness of mylonitic rock generally interpreted as a product of displacement on the thrust. The upper plate includes two Paleozoic units, a schist and gneiss sequence and a schist, quartzite, and marble metasedimentary sequence. Both sequences are thrust over the Mesozoic Pelona Schist along the Vincent Thrust, and intruded by Tertiary (late Oligocene) granitic rocks, granodiorite of Telegraph Peak, that also intrude the Vincent Thrust. The Pelona Schist consists mostly of greenschist to amphibolite metamorphic grade meta-basalt (greenschist and amphibolite) and meta-graywacke (siliceous and white mica schist), with minor impure quartzite and marble, in which all primary structures have been destroyed and all layering transposed. Cretaceous granitic rocks, chiefly tonalite, intrude the schist and gneiss sequence, but not the Pelona Schist or the Vincent Thrust.
North of the San Andreas Fault, bedrock units consist of undifferentiated Cretaceous tonalite, here informally named tonalite of Circle Mountain, with some included small boldies of gneiss and marble. These basement rocks are the westward continuation of rocks of the San Bernardino Mountains and not rocks of the San Gabriel Mountains south of the San Andreas Fault. Also north of the San Andreas Fault are the Oligocene Vaqueros Formation, middle Miocene Cajon Valley Formation, and Pliocene rocks of Phelan Peak. The latter two formations are divided into several conglomerate and arkosic sandstone subunits. In the northeastern corner of the quadrangle, the rocks of Phelan Peak are unconformably overlain by the Quaternary Harold Formation and Shoemaker Gravel. Quaternary units ranging from early Pleistocene to recent are mapped, and represent alluvial fan, landslide, talus, and wash environments.
The geologic map database contains original U.S. Geological Survey data generated by detailed field observation and by interpretation of aerial photographs. This digital Open-File map supercedes an older analog Open-File map of the quadrangle, and includes extensive new data on the Quaternary deposits, and revises some fault and bedrock distribution within the San Gabriel Mountains. The digital map was compiled on a base-stable cronoflex copy of the Telegraph 7.5' topographic base and then scribed. This scribe guide was used to make a 0.007 mil blackline clear-film, from which lines and point were hand digitized. Lines, points, and polygons were subsequently edited at the USGS 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 as polygons, and site-specific data as points. Polygon, arc, and point attribute tables (.pat, .aat, and .pat, respectively) uniquely identify each geologic datum.
  1. How should this data set be cited?

    Morton, Douglas M. , Woodburne, M.O., and Foster, J.H., 2001, Geologic Map of the Telegraph Peak 7.5' quadrangle, San Bernardino County, California: U.S. Geological Survey Open-File Report 01-293, U.S. Geological Survey, Menlo Park, California.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -117.6250927
    East_Bounding_Coordinate: -117.4999073
    North_Bounding_Coordinate: 34.37499995
    South_Bounding_Coordinate: 34.24998407

  3. What does it look like?

    <http://geopubs.wr.usgs.gov/open-file/of01-293/images/tel_map.jpg> (JPEG)
    Non-navigable image of the geologic map, topographic base, Correlation of Map Units, Description of Map Units and key to point and line symbols. 400x406 pixels, 32-bit RGB true color, 54k bytes.
    <http://geopubs.wr.usgs.gov/open-file/of01-293/tel_map.pdf> (PDF)
    Navigable portable document file image of the geologic map, topographic base, Correlation of Map Units, Description of Map Units and key to point and line symbols.

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 01-Apr-1974
    Ending_Date: 01-Aug-1981
    Currentness_Reference: New data and previously published data

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • Point (720)
      • String (1940)
      • GT-polygon composed of chains (721)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Polyconic.

      Projection parameters:
      Longitude_of_Central_Meridian: -117.5625
      Latitude_of_Projection_Origin: 34.25
      False_Easting: 0.00000
      False_Northing: 0.00000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.0027669065166
      Ordinates (y-coordinates) are specified to the nearest 0.0027669065166
      Planar coordinates are specified in Meters

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    Version 1.0 of the Telegraph 7.5' quadrangle comprises three ARC/INFO coverages, of which two contain geologic data, and one contains cartographic features: tel_geo (geology), tel_str (structural point data), and tel_ldr (annotation leaders). Two INFO tables, lines.rel and points.rel provide a full description of each of the geologic line and point features in the database. A full source citation is provided in the Entity_and Attribute_Detail_Citation section of this metadata document.
    Geologic data represented by line entities and the polygons they delineate are contained in the coverage TEL_GEO. For display purposes, the geology coverage contains two annotation subclasses: anno.geo contains unit labels, and anno.fault contains formal, fault names.
    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, TEL_STR which displays displays the respective dip and plunge values associated with individual point data.
    Entity_and_Attribute_Detail_Citation:
    A complete description of the polygon, line, and point data coding schemes is available in U.S. Geological Survey Open-File Reports OFR 97-859, OFR 97-860, and OFR 97-861 (full source citations follow):
    Matti, J.C., Miller, F.K., Powell, R.E., Kennedy, S.A., Bunyapanasarn, T.P., Koukladas, Catherine, Hauser, R.M., and Cossette, P.M., 1997b, Geologic-point attributes for digital geologic-map databases produced by the Southern California Areal Mapping Project (SCAMP), Version 1.0: U.S.Geological Survey Open-File Report 97-859
    Matti, J.C., Miller, F.K., Powell, R.E., Kennedy, S.A., and Cossette, P.M., 1997c, Geologic-polygon attributes for digital geologic-map databases produced by the Southern California Areal Mapping Project (SCAMP), Version 1.0: U.S.Geological Survey Open-File Report 97-860
    Matti, J.C., Powell, R.E., Miller, F.K., Kennedy, S.A., Ruppert, K.R., Morton, G.L., and Cossette, P.M., 1997a, Geologic-line attributes for digital geologic-map databases produced by the Southern California Areal Mapping Project (SCAMP), Version 1.0: U.S.Geological Survey Open-File Report 97-861
    tel_geo.pat
    Geologic units (LABL) and their corresponding names (NAME) identified in the Telegraph 7.5'quadrangle

    LABL
    geologic map unit label, in plain text

    ValueDefinition
    KcmTonalite of Circle Mountain
    KgdGanodiorite
    KssTonalite of San Sevaine Lookout
    MzpaPelona Schist, amphibolite grade schist
    MzpgPelona Schist, greenstone
    MzpsPelona Schist, muscovite schist
    PzmMetasedimentary rocks, undifferentiated
    PzsSchist and gneiss
    QhHarold Formation
    QlsVery young landslide deposits
    QoaOld alluvial-valley deposits
    QofbOld alluvial-fan deposits, boulder gravel
    QofgOld alluvial-fan deposits, gravel
    QshShoemaker Gravel
    QvofVery old alluvial-fan deposits
    QvofgVery old alluvial-fan deposits, gravel
    QvolsVery old landslide deposits
    QvolsaVery old landslide deposits, arenaceous
    QwbVery young wash deposits, boulder gravel
    QwgVery young wash deposits, gravel
    QyfgYoung alluvial-fan deposits, gravel
    QyfgbYoung alluvial-fan deposits, gravel boulder
    QylsYoung landslide deposits
    QytYoung talus deposits
    QywgYoung wash deposits, gravel
    Tcv1Rocks of Cajon Valley, Unit 1
    Tcv2Rocks of Cajon Valley, Unit 2
    Tcv3Rocks of Cajon Valley, Unit 3
    Tcv5Rocks of Cajon Valley, Unit 5
    Tcv5aRocks of Cajon Valley, Unit 5a
    Tpp1Phelan Peak deposits of Weldon (1984), Unit 1
    Tpp2Phelan Peak deposits of Weldon (1984), Unit 2
    Tpp3Phelan Peak deposits of Weldon (1984), Unit 3
    TtpGranodiorite of Telegraph Peak
    TvVaqueros Formation
    fzCrushed rock in fault zones
    gnGneiss
    mMarble

    PLABL
    Coded geologic map unit label used to generate plot labels with relevant stratigraphic symbols. The geologic units with LABL designating Mesozoic (Mz), and Paleozoic (Pz), have keystroke substitute characters, } and | respectively, 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. The Geoage Font Group is accessed through geofont.txt. The GeoAge Font Group and relevant information are available by anonymous FTP from: Server: onyx.wr.usgs.gov

    SHDPS
    polygon color (as integer value) from shadeset scamp2.shd (included in the data package)

    SHDFIL
    polygon fill pattern (as integer value) from shadeset geology2.shd

    NAME
    Geologic name of map unit (see list under LABL attribute)

    tel_geo.aat
    Geologic features such as contacts and faults that bound rock-unit polygons (a complete description of each line type is available in the data table, lines.rel.)

    L-TAG
    Coded alpha-numerical symbol that relates arc to definition of line type in dictionary look-up table (lines.rel). For description of attributes in line classification dictionary, refer to USGS Open-File Report 97-861 (see Entity_and_Attribute_Detail_Citation)

    ValueDefinition
    C1Contact, generic, certain, location meets map accuracy standard
    C17Contact, landslide, certain, location meets map accuracy standard
    C18Contact, landslide, certain, location may not meet map accuracy standard
    C19Contact, landslide, inferred, location may not meet map accuracy standard
    C25Contact, landslide, crown scarp, certain, location meets map accuracy standard
    C29Contact, sedimentary, certain, location meets map accuracy standard
    C30Contact, sedimentary, certain, location may not meet map accuracy standard
    C31Contact, sedimentary, inferred, location may not meet map accuracy standard
    C50Contact, igneous, location may not meet map accuracy standard
    C51Contact, igneous, inferred, location may not meet map accuracy standard
    C66Contact, metamorphic, certain, location may not meet map accuracy standard
    C67Contact, metamorphic, inferred, location may not meet map accuracy standard
    CL1Cartographic line, map boundary
    F1Fault, high angle, slip unspecified, location meets map accuracy standard
    F15Fault, high angle, strike slip, left lateral, inferred, location may not meet map accuracy standard
    F177Fault, thrust, older over younger, certain, location meets map accuracy standard
    F180Fault, thrust, older over younger, concealed, location may not meet map accuracy standard
    F19Fault, high angle, slip unspecified, concealed, location may not meet map accuracy standard
    F2Fault, high angle, right lateral strike slip, certain, location meets map accuracy standard
    F20Fault, high angle, right lateral strike slip, concealed, location may not meet map accuracy standard
    F21Fault, high angle, strike slip, left lateral, inferred, location may not meet map accuracy standard
    F24Fault, high angle, oblique slip, inferred, location may not meet map accuracy standard
    F3Fault, high angle, left lateral strike slip, scarp, certain, location meets map accuracy standard
    F45Fault, high angle, left lateral strike slip, questionable, inferred, location may not meet map accuracy standard
    F6Fault, high angle, oblique slip, certain, location meets map accuracy standard

    L-SYMB
    stores appropriate line symbol value from the lineset geoscamp2.lin

    L-NAME
    Formal name of fault

    tel_str.pat
    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, TEL_STR and displays the respective dip and plunge values associated with individual point data.

    P-TAG
    Coded alpha-numerical value that relates point entity to definition of point type in dictionary INFO table, points.rel. For description of attributes in point classification dictionary, refer to USGS Open-File Report 97-859 (see Entity_and_Attribute_Detail_Citation)

    ValueDefinition
    B1Bedding, sedimentary, horizontal
    B2Bedding, sedimentary, inclined
    B4Bedding, sedimentary, vertical
    B6Bedding, sedimentary, overturned
    FN42Foliation, metamorphic, inclined
    FN43Foliation, metamorphic, vertical
    L22Lineation, metamorphic, aligned mineral grains

    P-SYMB
    Coded integer value that relates point to cartographic point symbol in markerset geoscamp2.mrk

    P-DIP
    Dip of planar feature

    P-STRIKE
    Azimuthal strike of planar feature

    P-DIPDIR
    Azimuthal direction of dip of planar feature

    P-PLUNGE
    Plunge of linear feature

    P-BEARING
    Azimuthal direction of plunge of linear feature

    tel_ldr.aat
    Annotation leaders

    L-SYMB
    Coded integer value (1) that relates arcs to cartographic line symbol in lineset

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Technical review by Michael Kennedy led to significant improvements that eventually were reflected in aspects of the database, the plot file, and in the description of the geologic units of the Telegraph 7.5' quadrangle.
    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). In our digital preparation of the data set, carried out in the SCAMP Geographic Information System laboratory at the University of California, Riverside by Gregory Morton, and in the USGS Geographic Information System laboratory of the Mineral Resources Program of the U.S. Geological Survey in Spokane, Washington by Pamela M. Cossette, we received valuable assistance from Rachel Alvarez in Riverside, California, and from Paul C. Hyndman in Spokane, Washington.

  3. To whom should users address questions about the data?

    Douglas M. Morton
    U.S. Geological Survey, Western Region, Earth Surface Processes Team
    Project geologist
    U.S. Geological Survey
    Department of Earth Science
    University of California, Riverside
    Riverside, California 92521
    United States of America

    (909) 276-6397 (voice)
    (909) 276-6295 (FAX)
    scamp@usgs.gov

Why was the data set created?

The data set for the Telegraph 7.5' quadrangle was prepared under the U.S. Geological Survey Southern California Areal Mapping Project (SCAMP) and the California Division of Mines as part of an ongoing effort to develop a regional geologic framework of southern California, and to utilize a Geographical 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.
The digital geologic map database for the Telegraph 7.5' quadrangle has been created as a general-purpose data set that is applicable to other land-related investigations in the earth and biological sciences. For example, the U.S. Forest Service, San Bernardino National Forest, may use the map and database as a basic geologic data source for soil studies, mineral resource evaluations, road building, biological surveys, and general forest management. The database is not suitable for site-specific geologic evaluations at scales greater than 1:24,000 (1 in = 2,000 ft).

How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 1977 (process 1 of 7)
    Field mapping and aerial photograph interpretation; iterative process (D.M. Morton).

    Date: 1989 (process 2 of 7)
    Aerial photograph interpretation and limited field checking; iterative process (D.M. Morton).

    Date: 1978 (process 3 of 7)
    Transfer of geologic linework and point data from field maps and aerial photographs to a scale-stable cartographic base of quadrangle (scribeguide) (D.M. Morton).

    Date: 1997 (process 4 of 7)
    Description of Map Units and Correlation of Map Units (D.M. Morton).

    Date: 1997 (process 5 of 7)
    The geologic map information was hand digitized from a clear-film, right-reading, 0.007 mil thickness, base-stable blackline positive (made by contact photograph from a scribeguide) of the authors-prepared geologic map at 1:24,000 scale (G. Morton).

    Date: 1997 (process 6 of 7)
    ARC/INFO database established; cleanup of digitizing artifacts; polygon, arc, and point attribute tables established using model developed for SCAMP coverages. Digitizing and editing artifacts significant enough to display at a scale of 1:24,000 were corrected (P.M. Cossette).

    Date: 20-Apr-2001 (process 7 of 7)
    First draft of metadata created by Cossette using FGDCMETA.AML ver. 1.2 05/14/98 on ARC/INFO data set /pool5/c/cossette2/telegraph/tel_geo420a

  3. What similar or related data should the user be aware of?

    Morton, D.M., 1976, Geologic map of the Cucamonga fault zone between San Antonio Canyon and Cajon Creek, southern California: U.S. Geological Survey Open-File Report 76-726, U.S. Geological Survey, Menlo Park, California.

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Geologic-map units in the Telegraph 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.
    Lines and points that meet (or may not meet) this SCAMP internal map-accuracy standard are identified both in the digital database and on derivative geologic-map plots. Within the database, line and point data that are judged to meet the SCAMP internal map-accuracy standard are denoted by the attribute code .MEE. (meets) in the appropriate data table; line and point data that may not meet the SCAMP internal map-accuracy standard are denoted by the attribute code .MNM. (may not meet).
    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 (eg. symbols representing bedding, foliation, lineations, etc.).

  2. How accurate are the geographic locations?

    The maximum transformation RMS error acceptable for 7.5' quadrangle transformation and data input is 0.003 (7.6 meters). Horizontal positional accuracy was checked by visual comparison of hard-copy plots with base-stable source data.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    The geologic map and digital database of the Telegraph 7.5' quadrangle contain 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.

  5. How consistent are the relationships among the observations, including topology?

    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.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
The Telegraph 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Telegraph 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 geologic materials and structures. However, it is not sufficiently detailed for site-specific determinations.
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 parts of the map, the resolution of the combined output will be limited by the lower resolution data.

  1. Who distributes the data set? (Distributor 1 of 1)

    U.S. Geological Survey Information Services
    Box 25286 Denver Federal Center
    Denver, CO 80225
    USA

    303-202-4700 (voice)
    303-202-4693 (FAX)

  2. What's the catalog number I need to order this data set?

  3. What legal disclaimers am I supposed to read?

    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 the delivery, installation, operation, or support by USGS.
    This digital, geologic map database of the Telegraph Peak 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).

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 17-Sep-2001
Last Reviewed: 27-Sep-2001
Metadata author:
U.S. Geological Survey
c/o Pamela M. Cossette
Geographer
U.S. Geological Survey
West 904 Riverside Avenue
Spokane, Washington 99201-1087
USA

509-368-3123 (voice)
509-368-3199 (FAX)
pcossette@usgs.gov

Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

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