faults

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Frequently-anticipated questions:

What does this data set describe?
    Title: faults
    Abstract:
    This digital publication contains all the information used to publish U.S. Geological Survey Miscellaneous Investigations Series I-1933 (Bailey, 1989). The map shows the distribution and relationships of volcanic and surficial-sedimentary deposits in the Long Valley caldera and the Mono-Inyo Craters area. The Long Valley caldera and the Mono-Inyo Craters volcanic chain compose a late Tertiary to Quaternary volcanic complex on the west edge of the Basin and Range Province at the base of the Sierra Nevada frontal fault escarpment. The caldera, an east-west-elongate, oval depression 17 by 32 km, is located just northwest of the northern end of the Owens Valley rift and forms a reentrant or offset in the Sierran escarpment, commonly referred to as the "Mammoth embayment." The Mono-Inyo Craters volcanic chain forms a north-trending zone of volcanic vents extending 45 km from the west moat of the caldera to Mono Lake. The prevolcanic basement in the area is mainly Mesozoic granitic rock of the Sierra Nevada batholith and Paleozoic metasedimentary and Mesozoic metavolcanic rocks of the Mount Morrison, Gull Lake, and Ritter Range roof pendants (Map A).

    Sheet 2 of the map series contains a geologic map of Mono Lake (Quaternary rocks from Bailey [1975, 1978, 1987] and pre-Quaternary rocks generalized from Kistler [1966b] and Chesterman and Gray [1975]), five cross sections through Long Valley Caldera, a LANDSAT image of Long Valley Caldera and Vicinity (LANDSAT 4), a map of the pre-tertiary rocks (Map A), a map of the major faults and structural trends (Map B), a map of the precaldera volcanic vents (Map C), and a map of the postcaldera volcanic vents (Map D). (Taken from supplementary map materials.)

    Supplemental_Information:
    The scale of the map is 1:62,500. This metadata file is for the map faults including certain, approximate, and concealed faults, fissures, and monoclinal folds.

  1. How should this data set be cited?

    Roy A. Bailey U.S. Geological Survey, 1989, faults: I-1933, U.S. Geological Survey, Denver, CO.

    Online Links:

    • https://pubs.usgs.gov/dds/dds-81/

    Other_Citation_Details: Miscellaneous Investigations Series I-1933

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -119.197525
    East_Bounding_Coordinate: -118.541606
    North_Bounding_Coordinate: 38.104719
    South_Bounding_Coordinate: 37.511498

  3. What does it look like?

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

    Calendar_Date: 1989
    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):

      • String (1932)
      • Point (4)

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

      The map projection used is Transverse Mercator.

      Projection parameters:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -117.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000128
      Ordinates (y-coordinates) are specified to the nearest 0.000128
      Planar coordinates are specified in meters

      The horizontal datum used is D_Clarke_1866.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    faults

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    FNODE_
    Internal node number for the beginning of an arc (from-node). (Source: ESRI)

    Whole numbers that are automatically generated.

    TNODE_
    Internal node number for the end of an arc (to-node). (Source: ESRI)

    Whole numbers that are automatically generated.

    LPOLY_
    Internal node number for the left polygon. (Source: ESRI)

    Whole numbers that are automatically generated.

    RPOLY_
    Internal node number for the right polygon. (Source: ESRI)

    Whole numbers that are automatically generated.

    LENGTH
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    MAP_FAULTS
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    ITEM001
    User-defined feature number. (Source: ESRI)

    LTYPE

    ValueDefinition
    faultTrace of well located fault; ball and bar on downthrown side
    fault_approximateTrace of approximately located fault; ball and bar on downthrown side
    fault_concealedTrace of fault concealed by younger unit; ball and bar on downthrown side
    fissuresFissures and minor faults; ball and bar on downthrown side
    monoclinal_foldArrow points down dip

    SYMBOL

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?

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

    USGS Information Services (Map and Book Sales)
    U.S. Geological Survey
    Box 25286
    Denver, CO 80225
    USA

    (303) 202-4700 (voice)
    (303) 202-4693 (FAX)
    infoservices@usgs.gov

    Hours_of_Service: Monday through Friday 8:00 AM to 4:00 PM (Mountain Time)
    Contact_Instructions:
    If you have technical questions please contact sic_lvo@usgs.gov.

Why was the data set created?
The Geologic Map of the Long Valley Caldera, Mono-Inyo Craters Volcanic Chain, and Vicinity, Eastern California was originally published in 1989 by Roy A. Bailey. U.S. Geological Survey volcanic maps are created to better understand volcanic processes and to aid in the production of volcano-hazards assessments of the area. At this time the map is out of print and the original plates can not be located. Bailey's original maps have been scanned and are now available to the public as part of this digital publication.

How was the data set created?
  1. From what previous works were the data drawn?

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

    (process 1 of 3)
    Dataset copied.

    Data sources used in this process:

    • f:\jrobins\longvalley\map_faults

    (process 2 of 3)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xml24.tmp

    (process 3 of 3)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xmlD.tmp

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 1:62,500 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:62,500 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. Acknowlegdement of the U.S. Geological Survey would be appreciated in products derived from these data.

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

    U.S. Geological Survey
    c/o USGS Information Services
    Box 25286
    Denver, CO 80225-0046
    USA

    (303) 202-4200 (voice)
    (303) 202-4695 (FAX)
    infoservices@usgs.gov

    Hours_of_Service: Monday through Friday 8:00 AM to 4:00 PM (Mountain Time)
    Contact_Instructions: <http://rockyweb.cr.usgs.gov/public/html/pagetrav.html>
  2. What's the catalog number I need to order this data set?

    USGS Geologic Investigation Series # title (downloadable data)

  3. What legal disclaimers am I supposed to read?

    This database, identified as DDS-#, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.

  4. How can I download or order the data?

Who wrote the metadata?
Dates:
Last modified: 17-Mar-2003

Metadata author:
Dina Venezky
U.S. Geological Survey Volcano Hazards Team
Geologist
345 Middlefield Road MS 910
Menlo Park, CA 94025
USA

REQUIRED: The telephone number by which individuals can speak to the organization or individual. (voice)
650.329.5203 (FAX)
sic_lvo@usgs.gov

Contact_Instructions: Please contact the LVO Scientist-in-Charge by email.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

Generated by mp version 2.7.3 on Mon Mar 17 18:08:30 2003