Metadata: Identification_Information: Citation: Citation_Information: Originator: Susan J. Tewalt Publication_Date: 2000 Title: Overburden thickness of Fire Clay Coal Zone in Kentucky, 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 Online_Linkage: http://greenwood.cr.usgs.gov/pub/ppapers/p1625c/ Description: Abstract: This map is a generalized representation of the overburden of the Fire Clay coal bed in Virginia, West Virginia, and Kentucky. The coal bed is also known by other names, depending upon locale. It was created by subtracting a grid of coal elevation from a surface topographic grid. Because of the cell sizes of the grid and the highly dissected topography, the 0 to 200-foot overburden category was partly generated by buffering in from the outcrop line 100 meters. The data from West Virginia are not final in nature, as correlation of the beds in this stratigraphic seqence is ongoing. Thus the nature of this product is necessarily provisional. Overburden thickness has been divided into categories based on criteria from USGS Circular 891 (Wood and others, 1983). Introduction: This map is one of many Geographic Information System (GIS) products of the National Coal Assessment that is being conducted by the U.S. Geological Survey in cooperation with State geological surveys and other Federal and State agencies. The Middle Pennsylvanian Pottsville Group Fire Clay coal is an important resource in the Central Appalachian Basin coal region and has been mined for the last one hundred years. The Fire Clay coal is most commonly referred to as the Fire Clay (Hazard No. 4) in Kentucky, the Phillips in Virginia, and the Fire Clay in West Virginia. This resource model for the Fire Clay coal zone must be considered provisional, because the correlation of the zone continues to be evaluated in West Virginia. Purpose: The purpose of Professional Paper 1625 is to release the interpretation of assessment and modeling data for the the top-producing coal beds in the northern and central Appalachian Basin coal region. The purpose of this cover was to classify resources in this assessment. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Currentness_Reference: data collection and collation period Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -84.114 East_Bounding_Coordinate: -81.533 North_Bounding_Coordinate: 38.099 South_Bounding_Coordinate: 36.599 Keywords: Theme: Theme_Keyword_Thesaurus: Coal Resource Classification of the U.S. Geological Survey, USGS circular 891. Theme_Keyword: Eastern Energy Team Theme_Keyword: energy Theme_Keyword: power Theme_Keyword: resources Theme_Keyword: coal Theme_Keyword: coal resources Theme_Keyword: coal extent Theme_Keyword: bituminous Theme_Keyword: overburden Theme_Keyword: coal structure Theme_Keyword: outcrop Theme_Keyword: USGS Theme_Keyword: Kentucky Geological Survey Theme_Keyword: West Virginia Geological and Economic Survey Theme_Keyword: Virginia Division of Mineral Resources Theme_Keyword: Virginia Department of Mines, Minerals and Resources Place: Place_Keyword_Thesaurus: Geographic Names Information System Place_Keyword: United States Place_Keyword: Kentucky Place_Keyword: West Virginia Place_Keyword: Virginia Place_Keyword: Appalachians Place_Keyword: BELL County Place_Keyword: BOONE County Place_Keyword: BREATHITT County Place_Keyword: CLAY County Place_Keyword: FLOYD County Place_Keyword: HARLAN County Place_Keyword: JOHNSON County Place_Keyword: KNOTT County Place_Keyword: KNOX County Place_Keyword: LESLIE County Place_Keyword: LEE County Place_Keyword: LETCHER County Place_Keyword: LOGAN County Place_Keyword: MAGOFFIN County Place_Keyword: MARTIN County Place_Keyword: MORGAN County Place_Keyword: PERRY County Place_Keyword: PIKE County Place_Keyword: WHITLEY County Place_Keyword: WISE County 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: Pennsylvanian Stratum_Keyword: Middle Pennsylvanian Stratum_Keyword: Pikeville Formation Stratum_Keyword: Kanawha Formation Stratum_Keyword: Wise Formation Stratum_Keyword: Pottsville Group Stratum_Keyword: Breathitt Group Stratum_Keyword: Fire Clay Coal Stratum_Keyword: Phillips Coal Stratum_Keyword: Hazard No. 4 Coal Access_Constraints: None Use_Constraints: To be used for regional analysis only; not accurate at local scales. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Susan J. Tewalt (compiler) 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: 703-648-6437 Data_Set_Credit: State geological surveys maintain the most recent coal maps and have provided the USGS with the data necessary to complete the assessment. Primary contacts at the State surveys for this product include: KY- G. Weisenfluh; WV- B.M. Blake, Jr.; VA- R. Sites. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Deductive_Estimate: The polygon attributes are classifications of overburden thickness- thickness cutoffs for the classes are accurate to within 50 feet. Logical_Consistency_Report: Topology for this data set was built using the CLEAN command within ARC/INFO, version 7.2.1. This command eliminates dangling nodes, calculates intersections of arcs, eliminates redundant arcs, and creates a polygon attribute table. This data set does not contain dangles or redundant arcs. Completeness_Report: This data set is a general representation of overburden thickness for the Fire Clay coal zone. State agencies reviewed the data set for completeness. The State of Tennessee is not included in this coverage. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1998 Title: Digital elevation models Source_Scale_Denominator: 100000 Type_Of_Source_Media: disc Source_Time_Period_Of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: Publication Date Source_Citation_Abbreviation: FC-1 Source_Contribution: USGS DEM's provided the topographic surface used to calculate overburden. Compiler was Philip Freeman. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1999 Title: ARC grid c9125st_g - structure on top of the Fire Clay coal Source_Scale_Denominator: 100000 Type_Of_Source_Media: online Source_Time_Period_Of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: Publication Date Source_Citation_Abbreviation: FC-2 Source_Contribution: This file provided elevation of the Fire Clay coal. Process_Step: Process_Description: Imported 36 1:100,000 scale (30-minute) DEM's into ARC lattices for central Appalachians (no coverage of Pikeville, Ky and Beckley, WV 100K quadrangles). Process_Date: 1998 Process_Step: Process_Description: 36 lattices merged. Process_Date: 1998 Process_Step: Process_Description: Imported 32 1:24,000 scale (7.5-minute) DEM's into ARC lattices for both Pikeville, Ky and Beckley, WV 100K quadrangles. Process_Date: 1998 Process_Step: Process_Description: Lattices of Pikeville, Ky and Beckley, WV 100K quadrangle DEMs were merged, reprojected to geographic, decimal seconds and resampled the cell size to 2 arc-seconds. Process_Date: 1998 Process_Step: Process_Description: Merged two lattices (30-minute and 7.5-minute). Process_Date: 1998 Process_Step: Process_Description: Converted Z-units of topographic surface lattice from meters into feet and projected data set into Albers equal area projection to create source FC-1. Process_Date: 1998 Process_Step: Process_Description: EarthVision grid coverage of Fire Clay structure was exported in ASCII format and imported to ARC (FC-2). Process_Date: 1999 Process_Step: Process_Description: The structure grid was resampled to the same cell size as the topographic surface grid and was then subtracted from the topographic grid. Contour lines were created using latticecontour in 100-foot intervals. The line values specified in USGS Circular 891 were selected, ungenerated and re-imported to ARC as polygons using an ARC AML from the Illinois State Geological Survey and clipping to the outcrop polygon. Process_Date: 1999 Process_Step: Process_Description: Manual editing was performed in Arcedit to fix unlabeled polygons and erroneously labeled polygons. Process_Date: 1999 Process_Step: Process_Description: Outcrop line was buffered 100 meters and attributes added. Unioned buffer coverage and existing overburden coverage. Cleaned cover. Process_Date: 1999 Process_Step: Process_Description: Rechecked attribute values; updated with internal no-coal areas. Process_Date: 1999 Process_Step: Process_Description: Dissolved polygons on ob_cat value. Process_Date: 2000 Process_Step: Process_Description: Projected to geographic. Process_Date: 2000 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information SDTS_Terms_Description SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 4935 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0001 Longitude_Resolution: 0.0001 Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: c9125ob.pat Entity_Type_Definition: polygon attribute table for C9125ob coverage Entity_Type_Definition_Source: ARC/INFO Attribute: Attribute_Label: ob_cat Attribute_Definition: A unique code that describes whether coal has been mined or is remaining. A value of 999 is used for internal no-coal areas. Attribute_Definition_Source: this study Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 103 Enumerated_Domain_Value_Definition: 0-200 feet Enumerated_Domain: Enumerated_Domain_Value: 105 Enumerated_Domain_Value_Definition: 200-500 feet Enumerated_Domain: Enumerated_Domain_Value: 106 Enumerated_Domain_Value_Definition: 500-1000 feet Enumerated_Domain: Enumerated_Domain_Value: 107 Enumerated_Domain_Value_Definition: 1000-2000 feet Enumerated_Domain_Value_Definition_Source: Susan J. Tewalt (compiler) Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Susan J. Tewalt 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: 703-648-6437 Resource_Description: USGS Professional Paper 1625-C: Chapter F; c9125ob.e00 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 warranty, 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: ARCE Format_Version_Number: 7.2.1 Format_Information_Content: Polygonal overburden thickness coverage 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: 20000404 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Susan J. Tewalt (compiler) 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: 703-648-6437 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998