Reconnaissance Geologic Map of the Dixonville 7.5' Quadrangle, Oregon

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

Frequently anticipated questions:


What does this data set describe?

Title:
Reconnaissance Geologic Map of the Dixonville 7.5' Quadrangle, Oregon
Abstract:
This digital map database, compiled from new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Dixonville 7.5 minute quadrangle along the southeastern margin of the Oregon Coast Range and its tectonic boundary with Mesozoic terranes of the Klamath Mountains. Together with the accompanying text files as PDF (geol.pdf), it provides current information on the geologic structure and stratigraphy of the area covered. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps is 1:24,000. The spatial resolution (scale) of the database is 1:24,000 or smaller.
Supplemental_Information:
Procedures_Used: The databases in this report were compiled in ARC/INFO, a commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California, with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). The files are in either GRID (ARC/INFO raster data) format or COVERAGE (ARC/INFO vector data) format. Coverages are stored in uncompressed ARC export format (ARC/INFO version 8.0.2). ARC/INFO export files (files with the .e00 extension) can be converted into ARC/INFO coverages in ARC/INFO (see below) and can be read by some other Geographic Information Systems, such as MapInfo via ArcLink and ESRI's ArcView (version 1.0 for Windows 3.1 to 3.11 is available for free from ESRI's web site: http://www.esri.com). The digital compilation was done in version 8.0.2 of ARC/INFO with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). The geologic map information was digitized from stable originals of the geologic maps at 1:24,000 scale. The author manuscripts (pen on mylar and pen on paper) were scanned using a Ideal rasterizing color scanner with a resolution of 600 and 400 dots per inch. The scanned images were vectorized and transformed from scanner coordinates to projection coordinates with digital tics placed by hand at quadrangle corners. The scanned lines were edited interactively by hand using ALACARTE, color boundaries were tagged as appropriate, and scanning artifacts visible at 1:24,000 were removed.
  1. How might this data set be cited?
    Jayko, A.S., and Wells, R.E., 2001, Reconnaissance Geologic Map of the Dixonville 7.5' Quadrangle, Oregon: U.S. Geological Survey Open-File Report Open File Report 01-226, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -126.438942
    East_Bounding_Coordinate: -126.403744
    North_Bounding_Coordinate: 42.004158
    South_Bounding_Coordinate: 41.963226
  3. What does it look like?
    http://pubs.usgs.gov/of/2001/0226/images/dix.jpg (JPEG)
    Thumbnail 311 x233 pixel image of the entire map sheet
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2001
    Currentness_Reference:
    publication date
  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):
      • Complete chain (611)
      • Entity point (252)
      • GT-polygon composed of chains (252)
      • Point (16)
    2. What coordinate system is used to represent geographic features?
      The map projection used is Transverse Mercator.
      Projection parameters:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -123.0
      False_Easting: 500000.0
      False_Northing: 0.0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000032
      Ordinates (y-coordinates) are specified to the nearest 0.000032
      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 1/294.978698.
  7. How does the data set describe geographic features?
    Entity_and_Attribute_Overview:
    Because these data were created in Arc/Info, polygons are described by tables fitting the pattern cover.pat (here and after, "cover" refers to the name of the Arc/Info coverage). These contain the general attributes AREA, PERIMETER, cover#, and cover-ID. Likewise, lines are described by tables named cover.aat, and contain topological as well as general attributes FNODE#, TNODE#, LPOLY#, RPOLY#, LENGTH, cover#, and cover-ID.
    Because these data were created using Alacarte, the feature attribute tables also include the attributes LTYPE for lines and PTYPE for points and polygons, as well as SEL, which is used internally by Alacarte to mark features that are selected, and SYMB, which is used internally by Alacarte to symbolize the features for display. Additional attributes that contain scientific information may also be present, and are described in detail here.
    Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/of/2001/0226/pdf/geol.pdf
    dix_geo.pat
    Geologic units
    PTYPE
    Geologic unit label
    ValueDefinition
    QlsLandslide deposits (Holocene and Pleistocene?)
    QalAlluvial deposits (Holocene and Pleistocene?)
    QflFluvial deposits (Holocene and Pleistocene?)
    TdiTertiary intrusive (Oligocene?)
    TwtWhite Tail Ridge Formation (Lower Eocene)
    TmTenmile Formation undivided (Lower Eocene)
    TbrBushnell Rock Formation (Lower Eocene)
    TscSlater Creek Member (Lower Eocene)
    TbrmDebris flow deposit (Lower Eocene)
    TsrSiletz River Volcanics (Lower Eocene and upper Paleocene)
    KJiIntrusive rocks (Jurassic and/or Cretaceous)
    KJagAugen gneiss (Jurassic and/or Cretaceous?)
    KJdDothan Formation (Upper Jurassic and Lower Cretaceous)
    KJd2Semischistose Dothan Formation (Upper Jurassic and Lower Cretaceous)
    JrvRogue Formation? (Upper Jurassic)--
    JriMafic intrusive unit (Upper Jurassic?)
    JrsSerpentinized ultramafic rock (Jurassic?)
    JrvsSchistose Rogue Volcanics? (Upper Jurassic)
    JrisSchistose mafic intrusive unit (Upper Jurassic?)
    chtSchistose mafic intrusive unit (Upper Jurassic?)
    gs 
    ls 
    sp 
    water 
    dix_geo.aat
    LTYPE
    Geologically_significant linear features
    ValueDefinition
    contact, certain 
    contact, concealed 
    contact, inferred 
    contact, inferred, queried 
    fault, certain 
    fault, concealed 
    fault, inferred 
    map boundary 
    normal fault, certain 
    thrust fault, certain 
    thrust fault, concealed 
    thrust fault, inferred 
    thrust fault, inferred, queried 
    water boundary, certain 
    dix_stx.pat
    PTTYPE
    ValueDefinition
    _ anticline _ 
    approx bedding 
    bedding 
    bedding w/tops 
    crumpled bedding 
    crumpled foliation 
    fault dip 
    fault plane 
    fold axis 
    foliation 
    inclined cleavage 
    joint unmineralized 
    lineation 
    ot bedding 
    ot bedding w/tops 
    sfold 
    vert bedding 
    zfold 
    DIP
    STRIKE
    $ID
    $POLYGONID
    $SCALE
    $ANGLE
    dix_stx.aat
    Linear structural geologic features
    LTYPE
    Type of linear geologic feature
    ValueDefinition
    f.a., syncline, certain 
    f.a., syncline, certainm 
    f.a., anticline, certain 
    f.a., anticline, certain, plunge 
    f.a., syncline, certain 
    f.a., syncline, certainm 
    f.a., cross section 
    dix_ann.aat
    leaders to annotation marking small geologic units
    LTYPE
    Type of linear geologic feature
    ValueDefinition
    leader 

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • A.S. Jayko
    • R.E. Wells
  2. Who also contributed to the data set?
    A.S. Jayko and R.E. Wells
  3. To whom should users address questions about the data?
    U.S. Geological Survey
    Attn: Database Coordinator
    345 Middlefield Rd. MS-975
    Menlo Park, CA
    USA

    650-329-4935 (voice)
    kwheeler@usgs.gov

Why was the data set created?

This study was undertaken as part of a contribution to 1:100,000 mapping of the Roseburg 30' x 60' quadrangle (Wells, et al., 2000). The purpose of this mapping was to assess the oil and gas potential of the Tertiary Tyee basin (see Ryu, et al., 1996). This database and accompanying plot file depict the distribution of geologic materials and structures at a large (1:24,000) scale. The report is intended to provide geologic information for the study of material properties, mineral resources, and geologic hazards. In addition, the report contains new information and interpretations about the regional geologic history and framework. However, the scale of this report does not provide sufficient detail for site development purposes. For example, landslides in the database are generalized and many smaller slope failures are not shown.

How was the data set created?

  1. From what previous works were the data drawn?
    Jayko(1992-1993) (source 1 of 5)
    Jayko, A.S., 2001 (this report), Reconnaissance geologic map of the southern half of the Dixonville 7.5 minute quadrangle, Or. unpublished field sheet.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24000
    Source_Contribution: Dixonville quadrangle
    Wells (1993) (source 2 of 5)
    Wells, R.E., 2001(this report), Reconnaissance Geologic Map of the northern half of the Dixonvillle 7.5 minute quadrangle,Or. unpublished field sheet.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24000
    Source_Contribution: Dixonville quadrangle
    Champ (1969) (source 3 of 5)
    Champ, J. G., 1969, Geology of the northern part of the Dixonville quadrangle, Oregon: University of Oregon, Eugene, Oregon.

    Other_Citation_Details: M.Sc. thesis
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24000
    Source_Contribution: Dixonville quadrangle
    Hixon (1965) (source 4 of 5)
    Hixson, H. C.,, 1965, Geology of the southwest quarter of the Dixonville quadrangle, Oregon: University of Oregon, Eugene, Oregon.

    Other_Citation_Details: M.Sc. thesis
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24000
    Source_Contribution: Dixonville quadrangle
    Seeley (1974) (source 5 of 5)
    Seeley, W. O., 1974, Geology of the southeastern Dixonville quadrangle, Oregon: University of Oregon, Eugene, Oregon.

    Other_Citation_Details: M.Sc. thesis
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 24000
    Source_Contribution: Dixonville quadrangle
  2. How were the data generated, processed, and modified?
    Date: 1990 (process 1 of 2)
    The databases in this report were compiled in ARC/INFO, a commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California, with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). The files are in either GRID (ARC/INFO raster data) format or COVERAGE (ARC/ INFO vector data) format. Coverages are stored in uncompressed ARC export format (ARC/INFO version 8.0.2). ARC/INFO export files (files with the .e00 extension) can be converted into ARC/ INFO coverages in ARC/INFO (see below) and can be read by some other Geographic Information Systems, such as MapInfo via ArcLink and ESRI's ArcView (version 1.0 for Windows 3.1 to 3.11 is available for free from ESRI's web site: http://www.esri.com). The digital compilation was done in version 8.0.2 of ARC/INFO with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). The geologic map information was digitized from stable originals of the geologic maps at 1:24,000 scale. The author manuscripts (pen on mylar and pen on paper) were scanned using a Ideal rasterizing color scanner with a resolution of 600 and 400 dots per inch. The scanned images were vectorized and transformed from scanner coordinates to projection coordinates with digital tics placed by hand at quadrangle corners. The scanned lines were edited interactively by hand using ALACARTE, color boundaries were tagged as appropriate, and scanning artifacts visible at 1:24,000 were removed.
    Date: 02-Feb-2001 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Karen L. Wheeler
    U.S. Geological Survey
    Geologist/GIS
    U.S. Geological Survey
    Western Earth Surface Processes Team
    345 Middlefield Road, Mail Stop 975
    Menlo Park, CA
    USA

    650-329-4935 (voice)
    650-329-4936 (FAX)
    kwheeler@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?
  5. How consistent are the relationships among the observations, including topology?

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:
Uses of this digital geologic map 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 for a scale of 1:24,000 means that higher resolution information is not 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 below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    USGS Western Publications Group
    345 Middlefield Road, Mail Stop 951
    Menlo Park, CA
    US

    650-329-5057 (voice)
  2. What's the catalog number I need to order this data set? USGS Open-File Report 01-226
  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 or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 13-Jun-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/01-226/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:05:38 2018