Radiometric Ages from Rocks of the Great Basin

Table of Contents



IDENTIFICATION_INFORMATION


  Citation:
    Citation_Information:
      Originator: modified slightly from U.S. Geological Survey data
      Publication_Date: 19960906
      Title: Radiometric Agres from Rocks of the Great Basin
      Edition: 1
      Geospatial_Data_Presentation_Form: Map
      Publication_Information:
        Publication_Place: 
        Publisher: United States Geological Survey
      Other_Citation_Details:
        Raines, G.L., Sawatzky, D.L., and Connors, K.A., 1996,
        Great Basin Geoscience Data Base; USGS Digital Data Series DDS-041.
      Online_Linkage: HTTP://www.usgs.gov
      Larger_Work_Citation:
        Citation_Information:
          Originator: 
          Publication_Date: 
          Title: Great Basin Geoscience Database
          Publication_Information:
            Publication_Place: 
            Publisher: 
          Online_Linkage: 
  Description:
    Abstract:
      Point shapefile containing data on radiometric ages from
      rocks of the Great Basin. Data from Raines et al., 1996,
      with additional ages added by Mark Coolbaugh during a 2000
      literature search.
    Purpose:
      For geologic, mineral, or geothermal exploration
    Supplemental_Information:
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 
        Ending_Date: 
    Currentness_Reference: 
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: Unknown
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -111.6477
      East_Bounding_Coordinate: -76.2282
      North_Bounding_Coordinate: 80.7125
      South_Bounding_Coordinate: 72.0571
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Geology
      Theme_Keyword: Age Dates
      Theme_Keyword: radiometric age
      Theme_Keyword: Geologic Time
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: Great Basin
      Place_Keyword: Nevada
      Place_Keyword: Western United States
  Access_Constraints:
  Use_Constraints: This 
	spatial information was derived from a variety of sources.  Care was taken 
	in the creation of these themes, but they are provided "as is".  The Great 
	Basin Center for Geothermal Energy, the University of Nevada, Reno or any of 
	the data providers cannot accept any responsibility for errors, omissions, 
	or positional accuracy in the digital data or underlying records. There are 
	no warranties, expressed or implied, accompanying this data set. 
      Point_of_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Great Basin Center for Geothermal Energy
        Contact_Person: Richard Zehner
      Contact_Position: Research Scientist/Assistant GIS Specialist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: MS 172, University of Nevada, Reno
        City: Reno
        State_or_Province: NV
        Postal_Code: 89557
        Country: USA
      Contact_Voice_Telephone: 775-784-7055
      Contact_Facsimile_Telephone: 
      Contact_Electronic_Mail_Address: zehner@unr.edu
      Hours_of_Service: 8-5 M-F Pacific Time
  Native_Data_Set_Environment:
    ArcView version 3.3 shapefile format
   
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DATA_QUALITY_INFORMATION


  Attribute_Accuracy:
    Attribute_Accuracy_Report:
      unknown
  Logical_Consistency_Report:
  Completeness_Report:
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:
        unknown
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report:
        unknown
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: USGS
          Publication_Date: 19960906
          Title: Rad_Age
          Edition: 1
          Geospatial_Data_Presentation_Form: map
          Publication_Information:
            Publication_Place: 
            Publisher: USGS
          Other_Citation_Details:
            see above
          Online_Linkage: 
          Larger_Work_Citation:
            Citation_Information:
              Originator: 
              Publication_Date: 
              Title: 
              Publication_Information:
                Publication_Place: 
                Publisher: 
              Online_Linkage: 
      Source_Scale_Denominator: 
      Type_of_Source_Media: 
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 
            Ending_Date: 
        Source_Currentness_Reference: current
      Source_Citation_Abbreviation: 
      Source_Contribution:
    Process_Step:
      Process_Description:
        Data from Raines et. al., 1996, with additonal age dates
        added in 2000 by Mark Coolbaugh of the GBCGE
      Source_Used_Citation_Abbreviation: 
      Process_Date: 
      Source_Produced_Citation_Abbreviation: 
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Organization: 
            Contact_Person: 
          Contact_Position: 
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 
            City: 
            State_or_Province: 
            Postal_Code: 
            Country: 
          Contact_Voice_Telephone: 
          Contact_Facsimile_Telephone: 
          Contact_Electronic_Mail_Address: 
          Hours_of_Service: 

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SPATIAL_DATA_ORGANIZATION_INFORMATION


  Direct_Spatial_Reference_Method: Point
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Point
      Point_and_Vector_Object_Count: 4827

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SPATIAL_DATA_ORGANIZATION_INFORMATION


  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Complete Chain
      Point_and_Vector_Object_Count: 9384

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SPATIAL_REFERENCE_INFORMATION

 
  Horizontal_Coordinate_System_Definition:
    Planar:
      Map_Projection:
        Map_Projection_Name: Lambert Conformal Conic
        Lambert_Conformal_Conic:
          Standard_Parallel: 33.000000
          Standard_Parallel: 45.000000
          Longitude_of_Central_Meridian: -117.000000
          Latitude_of_Projection_Origin: 0.000000
          False_Easting: 0.000000
          False_Northing: 0.000000
          Standard_Parallel: 33.000000
          Standard_Parallel: 45.000000
          Longitude_of_Central_Meridian: -117.000000
          Latitude_of_Projection_Origin: 0.000000
          False_Easting: 0.000000
          False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: Coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 
          Ordinate_Resolution: 
        Planar_Distance_Units: Meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1927
      Ellipsoid_Name: Clarke 1866
      Semi-major_Axis: 6378206.4000000
      Denominator_of_Flattening_Ratio: 294.98

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ENTITY_AND_ATTRIBUTE_INFORMATION


  Overview_Description:
    Entity_and_Attribute_Overview:

Description of fields in the 
attribute table database:  Two fields have 
been added to this database.  They are:



Class_des: This field groups dates less 
than 1.5Ma by rock composition.  “<= 1.5 Ma” designates dates less than or equal 
to 1.5 Ma excluding dates on silicic volcanic rocks; “> 1.5 Ma” designates all 
dates greater than 1.5 Ma; and “rhyo <= 1.5 Ma” designates silicic volcanic 
rocks with dates less than or equal to 1.5 Ma



Volcanic: The value is “YES” only if the 
“Class_des” field is “<= 1.5 Ma” AND the date is from a volcanic rock.  (Some 
dates in the database are from hydrothermally altered rocks and don’t 
necessarily reflect the age of the host rock).


 Entity_and_Attribute_Detail_Citation:
      Unknown

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DISTRIBUTION_INFORMATION


  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Great Basin Center for Geothermal Energy
        Contact_Person: Richard E. Zehner
      Contact_Position: Research Scientist/Assistant GIS Specialist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: MS 172, University of Nevada, Reno
        City: Reno
        State_or_Province:NV 
        Postal_Code: 89557
        Country: USA
      Contact_Voice_Telephone:775-784-7055 
      Contact_Facsimile_Telephone: 
      Contact_Electronic_Mail_Address: zehner@unr.edu
      Hours_of_Service: 8-5, M-F, Pacific Time
  Resource_Description:
  Distribution_Liability:This 
	spatial information was derived from a variety of sources.  Care was taken 
	in the creation of these themes, but they are provided "as is".  The Great 
	Basin Center for Geothermal Energy, the University of Nevada, Reno or any of 
	the data providers cannot accept any responsibility for errors, omissions, 
	or positional accuracy in the digital data or underlying records. There are 
	no warranties, expressed or implied, accompanying this data set. 
    
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METADATA_REFERENCE_INFORMATION


  Metadata_Date: 8/16/2004
  Metadata_Review_Date: 
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization:Great Basin Center for Geothermal Energy 
        Contact_Person: Richard E. Zehner
      Contact_Position: Research Scientist/Assistant GIS Specialist
      Contact_Address:
        Address_Type: Mailing and physical address
        Address: MS 172, University of Nevada, Reno
        City: Reno
        State_or_Province:NV 
        Postal_Code: 89557
        Country: USA
      Contact_Voice_Telephone: 775-784-7055 
      Contact_Facsimile_Telephone: 
      Contact_Electronic_Mail_Address: zehner@unr.edu
      Hours_of_Service: 8-5 M-F Pacific Time
  Metadata_Standard_Name: FGDC CSDGM
  Metadata_Standard_Version: FGDC-STD-001-1998


======================================================================================


Additional Information




rad_age.shp (shapefile):


Title:  Radiometric age dates from the Great Basin, 
modified slightly from the version available from the USGS DDS-41 Great Basin 
Database (Raines et al., 1996).


Description:  USGS radiometric age dates compiled by 
Mark Mihalasky in 1985.  A few published Quaternary volcanic age dates for 
Nevada have been added, based on a literature search in 2000 by Mark Coolbaugh.  
For more details, see Raines et al. (1996).


Reference for this 
shapefile:



Raines, G.L., Sawatzky, D.L., and Connors, K.A., 1996, Great Basin Geoscience 
Data Base; USGS Digital Data Series DDS-041.


Description of fields in the 
attribute table database:  Two fields have 
been added to this database.  They are:



Class_des: This field groups dates less 
than 1.5Ma by rock composition.  “<= 1.5 Ma” designates dates less than or equal 
to 1.5 Ma excluding dates on silicic volcanic rocks; “> 1.5 Ma” designates all 
dates greater than 1.5 Ma; and “rhyo <= 1.5 Ma” designates silicic volcanic 
rocks with dates less than or equal to 1.5 Ma



Volcanic: The value is “YES” only if the 
“Class_des” field is “<= 1.5 Ma” AND the date is from a volcanic rock.  (Some 
dates in the database are from hydrothermally altered rocks and don’t 
necessarily reflect the age of the host rock).




Caveat: 
 This 
	spatial information was derived from a variety of sources.  Care was taken 
	in the creation of these themes, but they are provided "as is".  The Great 
	Basin Center for Geothermal Energy, the University of Nevada, Reno or any of 
	the data providers cannot accept any responsibility for errors, omissions, 
	or positional accuracy in the digital data or underlying records. There are 
	no warranties, expressed or implied, accompanying this data set.


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