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Preliminary map of selected post-Nevadan geologic features of the Klamath Mountains and adjacent areas, California and Oregon: A digital database

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Frequently anticipated questions:


What does this data set describe?

Title:
Preliminary map of selected post-Nevadan geologic features of the Klamath Mountains and adjacent areas, California and Oregon: A digital database
Abstract:
This map of selected post-Nevadan features is in a sense supplementary to Map I-2148 (Geologic map of the Klamath Mountains, compiled by W.P. Irwin, 1994). The map of selected post-Nevadan geologic features is in large part a compilation of the published work of many geologists (see Fig. 1--Index map showing sources of data). The principal focus of Map I-2148 concerned the assemblage of terranes that constitute the principal bedrock of the Klamath Mountains. The terranes of the Klamath Mountains variously consist of rocks that range from Cambrian to Late Jurassic and perhaps even earliest Cretaceous age. All of these terranes have been subjected to episodes of metamorphism, plutonism, and tectonism, including a major widespread tectonic event which occurred mainly in Jurassic time and which generally is referred to as the Nevadan orogeny.
The geologic map database delineates map units that are identified by general age, lithology and clast size following the stratigraphic nomenclature of the U. S. Geological Survey. The scale of the source map limits the spatial resolution (scale) of the database to 1:500,000 or smaller.
  1. How might this data set be cited?
    Irwin, William P., 1997, Preliminary map of selected post-Nevadan geologic features of the Klamath Mountains and adjacent areas, California and Oregon: A digital database: U.S. Geological Survey Open-File Report 97-465.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -124.6
    East_Bounding_Coordinate: -121.7
    North_Bounding_Coordinate: 43.0
    South_Bounding_Coordinate: 40.0
  3. What does it look like?
    http://pubs.usgs.gov/of/1997/of97-465/ofr97-465.pdf (PDF)
    PDF representation of the geologic map sheet (16.4 megabytes)
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1997Currentness_Reference: publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  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):
      • entity point
      • complete chain
      • GT-polygon composed of chains
    2. What coordinate system is used to represent geographic features?
      The map projection used is Lambert Conformal Conic.
      Projection parameters:
      Standard_Parallel: 33.00
      Standard_Parallel: 45.00
      Longitude_of_Central_Meridian: -123.0
      Latitude_of_Projection_Origin: 0.00
      False_Easting: 0.00
      False_Northing: 0.00
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest unknown
      Ordinates (y-coordinates) are specified to the nearest unknown
      Planar coordinates are specified in meters
  7. How does the data set describe geographic features?
    KLA-GEOL.PAT
    Geologic map units (Source: OFR-97-465)
    PTYPE
    Polygon type (Source: OFR-97-465)
    ValueDefinition
    H2Obody of water
    QyaYounger alluvium (Quaternary)
    QsDune and beach sand, where mapped (Quaternary)
    QfAlluvial fan deposits (Quaternary)
    QvVolcanic rocks (Quaternary)
    QtAlluvial deposits on low- and intermediate-level terraces associated with modern streams (Quaternary)
    QthAlluvial deposits on high-level terraces (Pleistocene and Pliocene?)
    QgGlacial deposits (Pleistocene)
    QbyBatter Formation (Pleistocene)
    QhcHookton Formation (Pleistocene)
    QmSmall marine terrace deposits near Cape Mendocino (Pleistocene)
    QToaOlder alluvium (Pleistocene and (or) Pliocene)
    QrbRed Bluff Formation (Pleistocene)
    QscSurpur Creek unit of the Prairie Creek formation (Pleistocene (and Pliocene?))
    QmsSkunk Cabbage unit of Prairie Creek Formation (Pleistocene)
    QTgbGold Bluffs unit of the Prairie Creek Formation (Pliocene and Pleistocene)
    QTfFalor Formation (Pleistocene and late Pliocene)
    QTwWildcat Formation, undivided (Pleistocene to late Miocene)
    QcCarlotta Formation (early Pleistocene)
    PuScotia Bluffs and Rio Dell Formations (late Pliocene)
    PlEel River Formation (early Pliocene)
    MuPullen Formation (late Miocene)
    TsgSt. George Formation (earliest Pliocene and latest Miocene)
    TtTyee Formation (middle Eocene)
    TssMarine sandstone and siltstone (middle Eocene)
    TscMarine deposits ranging from conglomerate to mudstone (early Eocene)
    TsmMarine sandstone, siltstone, and mudstone (early Eocene and Paleocene?)
    TehTehama Formation (Pliocene)
    TusTuscan Formation (Pliocene)
    TvVolcanic rocks (Pliocene)
    TmsSedimentary rocks (Miocene)
    TgRemnant patches of old high-level nonmarine gravels (Pliocene?)
    TwiWimer Formation (earliest Pliocene and late Miocene?)
    TiAlkalic intrusive rocks (Oligocene)
    TwWeaverville Formation (early Miocene and/or late Oligocene)
    TvsSedimentary and volcanic rocks (Oligocene and Eocene)
    TsSedimentary rocks (Eocene)
    TmcMontgomery Creek Formation (Eocene)
    TyYager Formation (late Eocene to Paleocene)
    TKcCoastal belt rocks (late Eocene to Late Cretaceous)
    TkrKing Range terrane (middle Miocene)
    KuLate Cretaceous shallow-marine sedimentary rocks of coastal Oregon (Maastrichtian and Campanian)
    KlMarine sedimentary rocks of coastal Oregon (Early Cretaceous)
    KJmMyrtle Group (Early Cretaceous and Late Jurassic)
    KhHornbrook Formation (Late Cretaceous)
    KcChico (aka Redding) Formation (Late Cretaceous)
    KgvGreat Valley sequence (Early Cretaceous)
    osRemnants of old upland surfaces in Klamath Mountains and Coast Ranges (Pleistocene to late Miocene)
    KLA-GEOL.AAT
    Linear geologic features (Source: OFR-97-465)
    LTYPE
    Line type (Source: OFR-97-465)
    ValueDefinition
    contact, approx. locatedContact whose position is not precisely known
    contact, certainObserved contact
    fault, approx. locatedFault whose position is not precisely known
    fault, certainObserved fault
    fault, concealedConcealed fault whose position is inferred
    map boundary, certainBoundary of mapped area
    ridgecrestbelow2000m, certainMountain ridge crest that is below 2000 meters
    ridgecrestabove2000m, certainMountain ridge crest that is above 2000 meters
    scratch boundaryScratch boundary
    water boundary, certainBoundary of a body of water
    KLA-GEOL.PAT
    Geologic units at specific locations (same attributes as polygon coverage KLA-GEOL.PAT (Source: OFR-97-465)
    KLA-PTS.PAT
    locations where nickeliferous lateritic soils have developed (Source: OFR-97-465)
    PTTYPE
    Point type (Source: OFR-97-465)
    ValueDefinition
    lateritenickeliferous lateritic soil
    KLA-SOILS.PAT
    locations where nickeliferous lateritic soils have developed (Source: OFR-97-465)
    PTYPE
    Polygon type (Source: OFR-97-465)
    ValueDefinition
    lateritenickeliferous lateritic soil
    KLA-SOILS.AAT
    line surrounding the locations where nickeliferous lateritic soils have developed (Source: OFR-97-465)
    LTYPE
    Line type (Source: OFR-97-465)
    ValueDefinition
    scratch boundaryScratch boundary surrounding lateritic soils
    KLA-SOILS.PAT
    locations where nickeliferous lateritic soils have developed (same attributes as polygon coverage KLA-SOILS.PAT) (Source: OFR-97-465)

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?
    I thank Carl Wentworth for encouraging me to prepare a digital version of this report. Scott Graham patiently taught and assisted me in digitizing the map, and Scott and Gregg Beukelman prepared to documentation for the digital database.
  3. To whom should users address questions about the data?
    Irwin, W. Porter
    USGS-GEO-WRG-EHZ
    Mail Stop 977, USGS
    345 Middlefield Rd
    Menlo Park, CA
    US

    650-329-5639 (voice)
    pirwin@usgs.gov

Why was the data set created?

To provide to the public a digital database of the Klamath mountain region.

How was the data set created?

  1. From what previous works were the data drawn?
    Irwin (1994) (source 1 of 1)
    Irwin, W.P., 1994, Geologic map of the Klamath Mountains, California and Oregon: U.S. Geological Survey Miscellaneous Investigations Series Map I-2148.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 500000
    Source_Contribution:
    This digital database is based on this geologic map of the same region.
  2. How were the data generated, processed, and modified?
    Date: 1994 (process 1 of 2)
    The geologic map information was digitized from a stable original of the geologic map at 1:500,000 scale. The author manuscript (ink on a greenline) was scanned using a monochrome scanner with a resolution of 800 dots per inch. The scanned image was vectorized and transformed from scanner coordinates to projection coordinates with digitaltics placed by hand at latitude/longitude intersections. The scanned lines were edited interactively by hand using graphical user interface ALACARTE (Fitzgibbon, 1991, Fitzgibbon and Wentworth, 1991, Wentworth and Fitzgibbon, 1991). Scanning artifacts significant for display at a scale of 1:500,000 were corrected. The base map layer (kla-topo) was prepared by scanning a scale-stable clear film of a photo-mechanical of parts of the California and Oregon state topographic maps (scale = 1:750,000). The base map only contains the culture and drainage layers, contours are notincluded in this base layer. The clear film was scanned using a monochrome scanner with a resolution of 400 dots per inch. The raster scan was converted to a GRID in ARC/INFO. The GRID was then vectorized and reprojected into UTM Projection using the latitude/longitude intersections as reference points.
    Date: 03-Aug-2000 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Jennifer Lenz
    US Geological Survey
    12201 Surise Valley Drive, Mail Stop 918
    Reston, VA
    USA

    703-648-6974 (voice)
    703-648-6560 (FAX)
    pschweitzer@usgs.gov
  3. What similar or related data should the user be aware of?

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

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Complete
  5. How consistent are the relationships among the observations, including topology?
    The map of selected post-Nevadan geologic features is in large part a compilation of the published work of many geologists.

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: none
  1. Who distributes the data set? (Distributor 1 of 1)
    USGS Information Services
    Box 25286, Denver Federal Center
    Denver, Colorado
    USA

    1-888-ASK-USGS (voice)
    1-303-202-4695 (FAX)
    infoservices@usgs.gov
  2. What's the catalog number I need to order this data set? US Geological Survey Open-File Report 97-465
  3. What legal disclaimers am I supposed to read?
    This report is preliminary and has not been reviewed for conformity with U. S. Geological Survey editorial standards. 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 "Preliminary map of selected post-nevadan geologic features of the Klamath Mountains and adjacent areas, California and Oregon: A digital database," has been approved for release and publication by the Director of the USGS. Although this database has been reviewed and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. This database is released on condition that neither the USGS nor the U. S. Government may be held liable for any damages resulting from its use.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 05-Feb-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/97-465/metadata.faq.html>

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URL: https://geo-nsdi.er.usgs.gov/metadata/open-file/97-465/metadata.faq.html
Page Contact Information: Peter Schweitzer
Page Last Modified: Monday, 14-Aug-2017 12:01:49 EDT

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