Ground-magnetic studies of the Amargosa desert region, California and Nevada

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Frequently anticipated questions:

What does this data set describe?

Ground-magnetic studies of the Amargosa desert region, California and Nevada
Hand-held magnetometer and sample magnetic susceptibility measurements used to help interpret complex patterns in the magnetic anomaly of this area.
  1. How might this data set be cited?
    Blakely, Richard J., Hillhouse, John W., and Morin, Robert L., 2005, Ground-magnetic studies of the Amargosa desert region, California and Nevada: Open-File Report 2005-1132, Geological Survey (U.S.), Menlo Park, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -116.862633
    East_Bounding_Coordinate: -116.272033
    North_Bounding_Coordinate: 36.502867
    South_Bounding_Coordinate: 36.313817
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2002
    ground condition
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Entity point (33)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitude and longitude values are specified in decimal degrees. The horizontal datum used is World Geodetic System 1984.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.
  7. How does the data set describe geographic features?
    Magnetic susceptibility measurements in the Amargosa Desert region
    Site identification Textual identifier without substantial scientific significance
    Geographic latitude
    Range of values
    Units:decimal degrees
    Geographic longitude
    Range of values
    Units:decimal degrees
    Average magnetic susceptibility measurement at the site
    Range of values
    Standard deviation of magnetic susceptibility measurements at the site
    Range of values
    Number of magnetic susceptibility measurements at the site
    Range of values
    Description of the local rocks at the site
    Calcareous spring deposit 
    Calcite cemented conglomerate; volcanic and metasedimentary clasts (see Fig. 8) 
    Calcite crack fillings; iron stained (see Fig. 11) 
    Caliche rubble 
    Clayey siltstone 
    Cobbles on desert pavement 
    Dolomite at Devils Hole 
    Dried mud 
    Fanglomerate cobbles; calcium-carbonate cemented 
    Fanglomerate next to calcite-filled cracks 
    Fanglomerate; above tuffaceous bed 
    Fanglomerate; Furnace Creek Formation 
    Fanglomerate; Furnace Creek Formationgraphical 
    Fine sandstone, tuffaceous(?), white 
    Pebbles on sand 
    Pebbly deposit on playa 
    Pebbly matrix 
    Pebbly surface 
    Scraped surface; calcium carbonate deposit 
    Siltstone with calcite nodules 
    Siltstone, Furnace Creek Formation 
    Siltstone, laminated 
    Siltstone, laminated, tuffaceous 
    Siltstone, white, resistant 
    Siltstone; laminated, green-white 
    Siltstone; white and gray 
    Siltstone; white and tan 
    White siltstone in road bed 

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Blakely, Richard J.
    • Hillhouse, John W.
    • Morin, Robert L.
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Richard J Blakely
    345 Middlefield Road
    Mail Stop 989
    Menlo Park, CA

    650-329-5316 (voice)
    650-329-5133 (FAX)

Why was the data set created?

Provide ground-truth information for magnetic anomaly studies designed to determine the cause of low-amplitude aeromagnetic anomalies over Quaternary alluvial deposits in the study area.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?

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

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

    1-888-ASK-USGS (voice)
    1-303-202-4695 (FAX)
  2. What's the catalog number I need to order this data set? USGS Open-File Report 2005-1123
  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, product, or firm 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?

Last modified: 10-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse,
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA

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

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