Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: Linda J. Bragg
        Publication_Date: 2000
        Title:
          Pond Creek Coal zone Point Data (Chemistry) in 
          Virginia and West Virginia
        Larger_Work_Citation:
          Citation_Information:
            Originator: Northern and Central Appalachian Basin Coal Regions
              Assessment Team
            Publication_Date: 2000
            Title:
              2000 Resource Assessment of Selected Coal Beds and Zones in the
              Northern and Central Appalachian Basin Coal Regions
            Series_Information:
              Series_Name: U.S. Geological Survey Professional Paper
              Issue_Identification: PP1625-C
            Publication_Information:
              Publication_Place: Reston, VA
              Publisher: U.S. Geological Survey
    Description:
      Abstract:
        This dataset (located by latitude and longitude) is a subset of the
        geochemical dataset found in Chap. H, Appendix 2, PP1625-C, and used
        in this study of the Pocahontas No. 3 coal bed. That dataset is a
        compilation of data from the U.S. Geological Survey's (USGS) National
        Coal Resources Data System (NCRDS) USCHEM (U.S. geoCHEMical), The
        Pennsylvania State University (PSU), and the West Virginia Economic and
        Geological Survey (WVGES) coal quality databases. The metadata file for
        the complete dataset is found in Chap. H, Appendix 3, PP1625-C
        (please see it for more detailed information on this geochemical
        dataset). This subset of the geochemical data for the Pocahontas No.
        3 coal bed includes ash yield, sulfur content, SO2 value, gross
        calorific value, arsenic content and mercury content for these 
        records, as well as the ranking of these values, which is described
        later under the attributes in this metadata file. Analytical techniques
        are described in the references in Chap. H, Appendix 4, PP1625-C. The
        analytical data are stored as text fields because many of the parameters
        contain letter qualifiers appearing after the numerical data values. The
        following is a list of the possible qualifier values: L - less than, G -
        greater than, N - not detected, or H - interference that cannot be
        easily resolved. Not all of these codes may be in this database.
      Purpose:
        The purpose of Professional Paper 1625-C is to release the
        interpretation of assessment and modeling data for the top-producing
        coal beds in the northern and central Appalachian Basin coal regions.
        The dataset has been generalized and is useful only in regional studies.
        Individuals who do not have an internet connection to access the
        detailed data coverages interactively through GeoDE or who cannot use
        the ARC/INFO export covers provided on Disc 2, PP1625-C, can use this 
        coverage to obtain limited information on the Pocahontas No. 3 coal bed.
    Time_Period_of_Content:
      Time_Period_Information:
        Range_of_Dates/Times:
          Beginning_Date: 1970's
          Ending_Date: 1997
      Currentness_Reference: data collection and collation period
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: None planned
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: -82.565
        East_Bounding_Coordinate: -80.738
        North_Bounding_Coordinate: 37.964
        South_Bounding_Coordinate: 36.842
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus:
          Coal Resource Classification of the U.S. Geological Survey, USGS
          Circular 891.
        Theme_Keyword: coal
        Theme_Keyword: bituminous
        Theme_Keyword: coal geochemistry
        Theme_Keyword: coal quality
        Theme_Keyword: U.S. Geological Survey (USGS)
        Theme_Keyword: West Virginia Geological and Economic Survey (WVGES)
        Theme_Keyword: The Pennsylvania State University (PSU)
        Theme_Keyword: U.S. Bureau of Mines (USBM)
        Theme_Keyword: Virginia Division of Mineral Resources (VDMR)
      Place:
        Place_Keyword_Thesaurus: Geographic Names Information System
        Place_Keyword: Appalachians
        Place_Keyword: Virginia (VA)
        Place_Keyword: West Virginia (WV)
        Place_Keyword: Buchanan County, VA
        Place_Keyword: Russell County, VA
        Place_Keyword: Tazewell County, VA
        Place_Keyword: Greenbrier County, WV
        Place_Keyword: McDowell County, WV
        Place_Keyword: Mercer County, WV
        Place_Keyword: Raleigh County, WV
        Place_Keyword: Summers County, WV
        Place_Keyword: Wyoming County, WV
      Stratum:
        Stratum_Keyword_Thesaurus:
          Geologic Names Unit Lexicon (GNULEX), 1996;
          Stratigraphic Nomenclature Databases for the United States, It's
          possessions, and Territories, U.S. Geological Survey Digital Data
          Series DDS-6, release 3.
        Stratum_Keyword: Pocahontas No. 3 coal bed
        Stratum_Keyword: Pocahontas No. 3 coal
        Stratum_Keyword: Lower Pennsylvanian
        Stratum_Keyword: Pottsville Group
    Access_Constraints: none
    Use_Constraints: none
    Point_of_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Linda J. Bragg
          Contact_Organization: U.S. Geological Survey, Eastern Energy
            Resources Team
        Contact_Address:
          Address_Type: mailing address
          Address: MS 956 National Center
          City: Reston
          State_or_Province: Virginia
          Postal_Code: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6451
    Data_Set_Credit:
      The geochemical data stored in the NCRDS USCHEM database have been
      generated from coal samples submitted by State geological surveys and 
      USGS scientists since the inception of NCRDS in the middle 1970's.
      Samples were submitted (date of submittal stored as SUBDATE field in 
      USCHEM database) and analyzed for the Pocahontas No. 3 coal bed through 
      the cooperation of coal geologists (primary contacts listed) at the West 
      Virginia Geological and Economic Survey (William Grady), the Virginia 
      Division of Mineral Resources (James Lovett), and U.S. Geological 
      Survey (staff) [WVGES, VDMR, and USGS, respectively].  Additional 
      data were obtained from WVGES for this study, as well as data 
      from the Pennsylvania State University (David Glick) coal quality
      database. [See references, Chap. H, Appendix 4, PP1625-C]. It is that are
      the sources of the original information in this study.
  Data_Quality_Information:
    Attribute_Accuracy:
      Attribute_Accuracy_Report:
        Deductive_Estimate: The accuracy of the geochemical data for each 
          element can be found in descriptions of analysis techniques listed 
          in references [Chap. H, Appendix 4, PP1625-C]. These references 
          include: ASTM, 1996; Glick, D.C, and Davis, A., 1991; Golightly, 
          D.W., and Simon, F.O., 1989; Suhr, N.H., and Gong, H., 1983; and 
          Swanson, V.E., and Huffman, Jr., C., 1976.
    Logical_Consistency_Report: For differences in measured data values arising
      from differences in analytical methods, see the following references:
      ASTM, 1996; Glick, D.C, and Davis, A., 1991; Golightly, D.W., and Simon,
      F.O., 1989; Suhr, N.H., and Gong, H., 1983; and Swanson, V.E., and
      Huffman, Jr., C., 1976. [See references, Chap. H, Appendix 4, PP1625-C]
    Completeness_Report: All available data for the Pocahontas No. 3 coal bed
      were compiled for this study. 
    Positional_Accuracy:
      Horizontal_Positional_Accuracy:
        Horizontal_Positional_Accuracy_Report: Several data sources were used 
          as input to this data set. The largest horizontal error is expected to 
          be approximately 1/4 mile. Original data were stored in NCRDS in 
          latitude/longitude coordinates with a possible precision of decimal 
          seconds. Data from PSU were also in latitude/longitude coordinates.
          The latitude/longitude coordinates for the WVGES data were in State 
          plane coordinates. Some loss of precision resulted upon conversion 
          from State plane coordinates to decimal degrees for the WVGES samples.
      Vertical_Positional_Accuracy: 
        Vertical_Positional_Accuracy_Report: The raw input data represent 
          thickness measurements from a variety of data types: cores, 
          outcrop, road cuts, and others. The original errors associated
          with these measurements are unknown.  Errors may arise from the
          differences in the judgment of geologists in the differentiation 
          between coal, bone and partings. Bone coal and partings > 3/8 in thick
          were assumed to be excluded from the samples during sampling.
          Thickness data were used in averaging the analytical data from partial
          (bench or lithotype) coal samples to represent the whole coal bed.
          Errors may also arise from miscorrelations of the coal beds.
    Lineage:
      Process_Step:
        Process_Description: This dataset was compiled as a selected subset of
          the complete dataset found in Chap. H, Appendix 2, PP1625-C. This
          subset of data contains all the data having latitudes and longitudes
          (point data which are capable of being mapped). Ash yield, sulfur
          content, and SO2 content data are classified into categories of low
          (> 0 - <= 8 percent ash; > 0 - <= 1 percent sulfur; > 0 - <= 1.2
          lbs SO2 per million Btu), medium (> 8 - <= 15 percent ash; > 1 - < 3
          percent sulfur; > 1.2 - <= 2.5 lbs SO2 per million Btu ), and 
          high (> 15 percent ash; >= 3 percent sulfur; > 2.5 lbs SO2 per million
          Btu). Ash yield and sulfur content are classified according to Wood
          and others (1983) [Chap. B, Appendix 1, PP1625-C]. SO2 content is
          classified according to past and present Clean Air Act Amendments
          [U.S. Statutes at Large, 1990; (See references, Chap. H, Appendix 4,
          PP1625-C)]. Calorific value, arsenic, and mercury are classified into 
          5 data categories, or quintiles, each representing 20 percent of the
          data values. Rankings of low, med low, medium, med high, and high are
          assigned to the quintile rankings based on the lowest to highest
          values in each 20 percent of the data.
        Process_Date: 2000
      Process_Step:
        Process_Description: Geochemical data for this study processed and
         attributes were then stored in a .dbf file.
        Process_Date: 2000
      Process_Step:
        Process_Description: In ArcView, converted .dbf file into shape file
          in geographic coordinates.
        Process_Date: 2000
  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: 193
  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Geographic:
        Latitude_Resolution: 0.00001
        Longitude_Resolution: 0.00001
        Geographic_Coordinate_Units: decimal degrees
  Entity_and_Attribute_Information:
    Detailed_Description:
      Entity_Type:
        Entity_Type_Label: ponchemp.dbf
        Entity_Type_Definition: point attribute table for shape file
          ponchemp.shp 
        Entity_Type_Definition_Source: ARCVIEW
      Attribute:
        Attribute_Label: CHEMID
        Attribute_Definition: North and Central Appalachian Basin
            identification number. For USGS samples, NCAID contains a list of
            the LABID and SAMPLENO for all samples combined. For all samples
            that are averaged, the NCAID contains AVG and the samples that were
            averaged together. Character data of 40 characters or less.
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Unrepresentable_Domain: Character field
      Attribute:
        Attribute_Label: State
        Attribute_Definition: Name of State where sample was collected.
          Character data of 2 characters or less.
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: VA
            Enumerated_Domain_Value_Definition:
              'VA' Virginia
          Enumerated_Domain:
            Enumerated_Domain_Value: WV
            Enumerated_Domain_Value_Definition:
              'WV' West Virginia
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: County
        Attribute_Definition:  Name of county in state where sample was
            Collected. Character data of 16 characters or less.
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Buchanan 
            Enumerated_Domain_Value_Definition: 
              'Buchanan' Buchanan County, VA 
          Enumerated_Domain:
            Enumerated_Domain_Value: Russell 
            Enumerated_Domain_Value_Definition: 
              'Russell' Russell County, VA 
          Enumerated_Domain:
            Enumerated_Domain_Value: Tazewell 
            Enumerated_Domain_Value_Definition: 
              'Tazewell' Tazewell County, VA 
          Enumerated_Domain:
            Enumerated_Domain_Value: Greenbrier
            Enumerated_Domain_Value_Definition: 
              'Greenbrier' Greenbrier County, WV
          Enumerated_Domain:
            Enumerated_Domain_Value: McDowell 
            Enumerated_Domain_Value_Definition: 
              'McDowell' McDowell County, WV
          Enumerated_Domain:
            Enumerated_Domain_Value: Mercer 
            Enumerated_Domain_Value_Definition: 
              'Mercer' Mercer County, WV
          Enumerated_Domain:
            Enumerated_Domain_Value: Raleigh 
            Enumerated_Domain_Value_Definition: 
              'Raleigh' Raleigh County, WV
          Enumerated_Domain:
            Enumerated_Domain_Value: Summers 
            Enumerated_Domain_Value_Definition:
              'Summers' Summers County, WV
          Enumerated_Domain:
            Enumerated_Domain_Value: Wyoming 
            Enumerated_Domain_Value_Definition:
              'Wyoming' Wyoming County, WV
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: Long_Deg
        Attribute_Definition: Longitude coordinate for point source location
            of coal sample (decimal degrees). [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -82.349298
            Range_Domain_Maximum: -80.755768
      Attribute:
        Attribute_Label: Lat_Deg
        Attribute_Definition: Latitude coordinate for point source location
            of coal sample (decimal degrees). [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 36.889920
            Range_Domain_Maximum: 37.942879
      Attribute:
        Attribute_Label: Sampthk
        Attribute_Definition: Thickness of the sample, measured in decimal
            feet. [0 = no thickness value]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.0
            Range_Domain_Maximum: 9.64
      Attribute:
        Attribute_Label: ASH
        Attribute_Definition: Ash yield in percent as determined by ASTM
            method D-3174 (ash obtained at 750 degrees C) [see ASTM, 1996;
            Glick, D.C, and Davis, A., 1991; Golightly, D.W., and Simon, F.O.,
            1989; Suhr, N.H., and Gong, H., 1983; and Swanson, V.E., and
            Huffman, Jr., C., 1976; [See references, Chap. H, Appendix 4, 
            PP1625-C)]. Character data of 10 characters or less. Qualifier
            letter appears after numerical value. [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 2.90
            Range_Domain_Maximum: 13.43
            Attribute_units_of_measure: percent
      Attribute:
        Attribute_Label: ASH_RKNG
        Attribute_Definition: Ranking of ash yield values, which are classified
            into categories [Wood and others, 1983; (Chap. B, Appendix 1, 
            PP1625-C)] of low (> 0 - <= 8 percent ash), medium (> 8 - <= 15 
            percent ash), and high (> 15 percent ash). Character data of 10 
            characters or less. [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: low
            Enumerated_Domain_Value_Definition:
              'low' (> 0 - <= 8 percent ash yield)
          Enumerated_Domain:
            Enumerated_Domain_Value: medium
            Enumerated_Domain_Value_Definition:
              'medium' (> 8 - <= 15 percent ash yield)
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: S
        Attribute_Definition: Sulfur (S) content in percent as determined by 
            ASTM method D-3177 in USGS or other labs [see ASTM, 1996; Glick,
            D.C, and Davis, A., 1991; Golightly, D.W., and Simon, F.O., 1989;
            Suhr, N.H., and Gong, H., 1983; and Swanson, V.E., and Huffman, Jr.,
            C., 1976; (See references, Chap. H, Appendix 4, PP1625-C)]. 
            Character data of 10 characters or less. Qualifier letter appears 
            after numerical value. [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.40
            Range_Domain_Maximum: 1.15
            Attribute_units_of_measure: percent
      Attribute:
        Attribute_Label: S_RKNG
        Attribute_Definition: : Ranking of sulfur content values, which are
            classified into categories [Wood and others, 1983; (Chap. B,
            Appendix 1, PP1625-C)] of low (> 0 - <= 1 percent sulfur), 
            medium (> 1 - < 3 percent sulfur), and high (>= 3 percent
            sulfur). Character data of 10 characters or less. [nd = no data
            entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: low
            Enumerated_Domain_Value_Definition:
              'low' (> 0 - <= 1 percent sulfur content)
          Enumerated_Domain:
            Enumerated_Domain_Value: medium
            Enumerated_Domain_Value_Definition:
              'medium' (> 1 - < 3 percent sulfur content)
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: SO2 
        Attribute_Definition: Sulfur dioxide (SO2) values calculated as lbs of
            sulfur dioxide per million Btu. Character data of 10 characters or
            less. Qualifier letter appears after numerical value. [nd = no data
            entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.56
            Range_Domain_Maximum: 1.66
            Attribute_units_of_measure: pounds per million British thermal unit
      Attribute:
        Attribute_Label: SO2_RKNG
        Attribute_Definition: Ranking of sulfur dioxide (SO2) values, which are
            classified into categories [see U.S. Statutes at large, 1990; (See
            references, Chap. H, Appendix 4, PP1625-C)] of low (> 0 - <= 1.2 lbs 
            SO2 per million Btu), medium (> 1.2 - <= 2.5 lbs SO2 per million 
            Btu), and high (> 2.5 lbs SO2 per million Btu). Character data of 10 
            characters or less. [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: low
            Enumerated_Domain_Value_Definition:
              'low' (> 0 - <= 1.2 lbs SO2 per million Btu) 
          Enumerated_Domain:
            Enumerated_Domain_Value: medium
            Enumerated_Domain_Value_Definition:
              'medium' (> 1.2 - <= 2.5 lbs SO2 per million Btu)
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: CV
        Attribute_Definition: Gross calorific value (CV) of the coal sample
            expressed in British Thermal Units (BTU/lb) as determined by ASTM
            method D-2015 [see ASTM, 1996; Glick, D.C, and Davis, A., 1991;
            Golightly, D.W., and Simon, F.O., 1989; Suhr, N.H., and Gong, H.,
            1983; and Swanson, V.E., and Huffman, Jr., C., 1976; (See
            references, Chap. H, Appendix 4, PP1625-C)]. Character data of 10
            characters or less. Qualifier letter appears after numerical value.
            [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 13,380
            Range_Domain_Maximum: 15,190
            Attribute_units_of_measure: British thermal units per pound
      Attribute:
        Attribute_Label: CV_RKNG
        Attribute_Definition: Ranking of gross calorific values, which are
            classified into 5 data categories, or quintiles, each
            representing 20 percent of the data values. Character
            data of 10 characters or less. [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: low
            Enumerated_Domain_Value_Definition:
              'low' (> 0 - <= 14,270 Btu/lb) 
          Enumerated_Domain:
            Enumerated_Domain_Value: med low
            Enumerated_Domain_Value_Definition:
              'med low' (> 14,270 - <= 14,510 Btu/lb) 
          Enumerated_Domain:
            Enumerated_Domain_Value: medium
            Enumerated_Domain_Value_Definition:
              'medium' (> 14,510 - <= 14,600 Btu/lb)
          Enumerated_Domain:
            Enumerated_Domain_Value: med high
            Enumerated_Domain_Value_Definition:
              'med high' (> 14,600 - <= 14,700 Btu/lb) 
          Enumerated_Domain:
            Enumerated_Domain_Value: high
            Enumerated_Domain_Value_Definition:
              'high' (> 14,700 Btu/lb)
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: AS
        Attribute_Definition: Arsenic (AS) value in parts per million as
            determined on whole-coal by USGS laboratories using either wet
            chemistry analysis for samples analyzed in Denver (D for LABID)
            before 1976 or Instrumental Neutron Activation Analysis (INAA) for
            samples analyzed in Reston (W for LABID) and for samples analyzed
            after 1976 in Denver [Swanson, V.E., and Huffman, Jr., C., 1976;
            Golightly, D.W., and Simon, F.O., 1989; (See references, Chap. H,
            Appendix 4, PP1625-C)]. Where SUBDATE is greater than or equal to
            1990/01/01, arsenic was converted from arsenic value determined on
            the coal ash (obtained at 525 degrees C) by inductively coupled
            argon plasma-mass spectroscopy (ICAP-MS), using an acid digest
            decomposition technique [Meier, A.L., 1997 ; (See references, Chap.
            H, Appendix 4, PP1625-C)]. Character data of 10 characters or less.
            Qualifier letter appears after numerical value. [nd = no data
            entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.3
            Range_Domain_Maximum: 35
            Attribute_units_of_measure: parts per million
      Attribute:
        Attribute_Label: AS_RKNG
        Attribute_Definition: Ranking of arsenic content values, which are
            classified into 5 data categories, or quintiles, each representing
            20 percent of the data values. Character data of 10 characters or
            less. [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: low
            Enumerated_Domain_Value_Definition:
              'low' (> 0 - <= 1.5 ppm) 
          Enumerated_Domain:
            Enumerated_Domain_Value: med low
            Enumerated_Domain_Value_Definition:
              'med low' (> 1.5 - <= 3.0 ppm) 
          Enumerated_Domain:
            Enumerated_Domain_Value: medium
            Enumerated_Domain_Value_Definition:
              'medium' (> 3.0 - <= 5.7 ppm)
          Enumerated_Domain:
            Enumerated_Domain_Value: med high
            Enumerated_Domain_Value_Definition:
              'med high' (> 5.7 - <= 12 ppm) 
          Enumerated_Domain:
            Enumerated_Domain_Value: high
            Enumerated_Domain_Value_Definition:
              'high' (> 12 ppm)
            Enumerated_Domain_Value_Definition_Source: USGS
      Attribute:
        Attribute_Label: HG
        Attribute_Definition: Mercury (HG) value in parts per million as
            determined on whole-coal by USGS laboratories using wet chemistry
            analysis (cold-vapor atomic absorption) [Swanson, V.E., and
            Huffman, Jr., C., 1976; Golightly, D.W., and Simon, F.O., 1989;
            (See references, Chap. H, Appendix 4, PP1625-C)]. Character data 
            of 10 characters or less. Qualifier letter appears after numerical
            value. [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.0099L
            Range_Domain_Maximum: 0.15
            Attribute_units_of_measure: parts per million
      Attribute:
        Attribute_Label: HG_RKNG
        Attribute_Definition: Ranking of mercury content values, which are
            classified into 5 data categories, or quintiles, each representing
            20 percent of the data values. Character data of 10 characters or
            less. [nd = no data entered]
        Attribute_Definition_Source: this study
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: low
            Enumerated_Domain_Value_Definition:
              'low' (> 0 - <= 0.016 ppm) 
          Enumerated_Domain:
            Enumerated_Domain_Value: med low
            Enumerated_Domain_Value_Definition:
              'med low' (> 0.016 - <= 0.050 ppm) 
          Enumerated_Domain:
            Enumerated_Domain_Value: medium
            Enumerated_Domain_Value_Definition:
              'medium' (> 0.050 - <= 0.071 ppm)
          Enumerated_Domain:
            Enumerated_Domain_Value: med high
            Enumerated_Domain_Value_Definition:
              'med high' (> 0.071 - <= 0.10 ppm) 
          Enumerated_Domain:
            Enumerated_Domain_Value: high
            Enumerated_Domain_Value_Definition:
              'high' (> 0.10 ppm)
            Enumerated_Domain_Value_Definition_Source: USGS
  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Linda J. Bragg
          Contact_Organization: U.S. Geological Survey, Eastern Energy Resources
            Team
        Contact_Address:
          Address_Type: mailing address
          Address: MS 956 National Center
          City: Reston
          State_or_Province: Virginia
          Postal_Code: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6451
    Resource_Description: U.S. Geological Survey Professional Paper PP1625-C;
      ponchemp.dbf 
    Distribution_Liability:
      Any use of trade, product, or firm names is for descriptive purposes
      only and does not imply endorsement by the U.S. Government. Although these
      data have been used by the U.S. Geological Survey (USGS), no warranty,
      expressed or implied, is made by the USGS as to the accuracy of the data
      and related materials. The act of distribution shall not constitute any
      such warrantity, and no responsibility is assumed by the USGS in the use
      of these data, software, or related materials.
    Standard_Order_Process:
      Digital_Form:
        Digital_Transfer_Information:
          Format_Name: ASCII comma delimited
          Format_Information_Content: point database with selected coal
            geochemistry values for the Pocahontas No. 3 coal bed
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: http://greenwood.cr.usgs.gov/pub/ppapers/p1625c/
      Fees: none
  Metadata_Reference_Information:
    Metadata_Date: 20000331
    Metadata_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Linda J. Bragg
          Contact_Organization: U.S. Geological Survey, Eastern Energy Resources Team
        Contact_Address:
          Address_Type: mailing address
          Address: MS 956 National Center
          City: Reston
          State_or_Province: Virginia
          Postal_Code: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6451
    Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998