Metadata: Identification_Information: Citation: Citation_Information: Originator: Susan J. Tewalt Publication_Date: 2000 Title: Contours of potentially minable thickness for the Fire Clay coal zone in Virginia, Kentucky, 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 dataset represents the thickness of the potentially minable Fire Clay coal benches in Virginia, West Virginia, and Kentucky. The coal zone is known by other names, depending upon locale. The data were comprised of values from Kentucky in EXCEL format, data searched from the USGS' NCRDS database for Virginia and entered into StratiFact, and a StratiFact database obtained from the West Virginia Geological and Economic Survey (WVGES). Point data were gridded, the grid contoured and imported to ARC/INFO as polygons. The Kentucky portion was replaced by a polygonal thickness coverage obtained from the Kentucky Geological Survey that had been manually contoured, therefore State line discrepancies are to be expected. The data obtained from the WVGES are not final in nature, because correlation of the beds in this stratigraphic sequence is ongoing. Thus the nature of this product is necessarily provisional. 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 provide coal thickness for determining resources in this study. 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: isopach Theme_Keyword: coal thickness Theme_Keyword: outcrop Theme_Keyword: USGS Theme_Keyword: Kentucky Geological Survey (KGS) Theme_Keyword: West Virginia Geological and Economic Survey (WVGES) Theme_Keyword: Virginia Division of Mineral Resources (VDMR) 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. 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, VA- R. Sites. It is recommended that new data be obtained from the State geological surveys that are the sources of the information used in this study. Information for Kentucky can be found online at: http://www.uky.edu/KGS/home.htm. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Deductive_Estimate: The range of the input data was from 0 to 8.58 feet, with a mean of 2.00 ft and a standard deviation of 1.44 ft. The grid from which these contours were obtained had a mean of 1.6 ft and a standard deviation of 1.5, with an average z error of 0.1 ft. In areas of sparse data, the coverage will not reflect ground truth. This thickness coverage does not represent the entire Fire Clay coal zone thickness, but the thickness of the benches that are most likely to be mined. Logical_Consistency_Report: This data set does not contain dangles or redundant arcs. Completeness_Report: The input data to this coverage will be more complete in the future and possibly revised in the State of West Virginia. The source maps are believed to be the most up to date at the time of collection. State agencies reviewed the data set for completeness. The State of Tennessee is not included in this coverage. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Locations of the input points used to create this cover are estimated to be accurately located within 1/4 mile. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Fire Clay thicknesses were searched from the VA database and merged with data searched from the WV StratiFact database. Searches were done by name and lithology, which had been established using criteria for determining which bench(es) of the Fire Clay could be potentially mined. The values were appended to public KY thickness values which had been provided to the USGS in spreadsheet format. [Different stratigraphic nomenclature is a problem in merging state StratiFact databases into one.] Data were input to EarthVision and projected to Albers coordinates from geographic. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Virginia Division of Mineral Resources Publication_Date: 1998 Title: StratiFact database generated from National Coal Resources Data System database Source_Scale_Denominator: 24000 Type_Of_Source_Media: online Source_Time_Period_Of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: Publication Date Source_Citation_Abbreviation: VA-1 Source_Contribution: Data searched from NCRDS for Virginia were the entire basis for thickness of potentially minable benches of the Fire Clay coal zone in Virginia. Source_Information: Source_Citation: Citation_Information: Originator: Kentucky Geological Survey Publication_Date: 1997 Title: fcl_thk.e00; export Arc/Info cover of thickness for Fire Clay Source_Scale_Denominator: 100,000 Type_Of_Source_Media: online Source_Time_Period_Of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1997 Source_Currentness_Reference: Publication Date Source_Citation_Abbreviation: KY-1 Source_Contribution: This file was total source for thickness contours (digitized from manually drawn contours) for the Fire Clay coal zone in Kentucky. Source_Information: Source_Citation: Citation_Information: Originator: West Virginia Geological and Economic Survey Publication_Date: 1998 Title: WVGES StratiFact database for Fire Clay coal. Source_Scale_Denominator: 24000 Type_Of_Source_Media: online Source_Time_Period_Of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1980 - 1986 Source_Currentness_Reference: Publication Date Source_Citation_Abbreviation: WV-1 Source_Contribution: Data searched were complete basis for thickness in West Virginia. Process_Step: Process_Description: 1. All appropriate thickness data from KCRIS databases were plotted on 1:100,000-scale base maps and overlain with facies lines representing coal bed discontinuities. Coal thickness isolines were hand drawn for standard U.S.G.S. thickness categories (Wood and others, 1983). Contours were drawn so that they did not cross facies boundaries, as these are considered discontinuities of the bed. Isolated values that were inconsistent with surrounding data were ignored in order to avoid overly complex maps. Vector polygons were digitized in ARC/INFO and encoded with category labels to create data spurce KY-1. Contributions by : G. Weisenfluh and E. Thacker. Process_Date: 1998 Process_Step: Process_Description: NCRDS data downloaded for Virginia. Fire Clay (Phillips coal in Virginia) data were checked against original records for the Appalachia 7.5' quad (which had been verified and correlated by VDMR). Correlations for the Fire Clay were verified or created by USGS for holes in the remainder of the Virginia dataset. Process_Date: 1998 Process_Step: Process_Description: Fire Clay thicknesses were searched from the VA database and merged with data searched from the WV StratiFact database. Searches were done by name and lithology, which had been established using criteria for determining which bench(es) of the Fire Clay could be potentially mined. The values were appended to public KY thickness values which had been provided to the USGS in spreadsheet format. Data were input to EarthVision and projected to Albers coordinates from geographic. Process_Date: 1999 Process_Step: Process_Description: Data were gridded using 300 meter cell size, isopach algorithm, extrapolation, exact z range, 4 neighboring point search, and no faults. Grid was multiplied by 100 and contoured using specified contour intervals (representing 1.17 ft) and exported into an ASCII file. Process_Date: 1999 Process_Step: Process_Description: ASCII contour lines imported to ARC/INFO as polygons using ARC AML from Illinois State Geological Survey, clipping with a simple polygon. Manual corrections made for missing polygon labels; polygons less than 90,000 square meters were selected and deleted. Process_Date: 1999 Process_Step: Process_Description: The KY part of the thickness coverage was removed by using a coverage from the Kentucky Geological Survey as an erase cover. The items in both covers were then altered to be the same and mapjoined. Process_Date: 1999 Process_Step: Process_Description: The polygons were clipped by a polygon coverage representing the outcrop/resource assessment areas of the Fire Clay coal. Process_Date: 1999 Process_Step: Process_Description: The coverage was updated with internal no-coal polygons. Process_Date: 1999 Process_Step: Process_Description: An attribute was added to group thicknesses into the resource categories specified in USGS Circular 891. Process_Date: 1999 Process_Step: Process_Description: Projected to geographic coordinates. Process_Date: 1999 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: 3268 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: c9125is.pat Entity_Type_Definition: polygon attribute table for C9125is coverage Entity_Type_Definition_Source: ARC/INFO Attribute: Attribute_Label: thick Attribute_Definition: Potentially minable coal thickness; 0 values in internal no-coal areas Attribute_Definition_Source: this study Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 8.755 Attribute_units_of_measure: feet Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 0.585 Attribute_Value_Accuracy_Explanation: half of one contour interval Attribute: Attribute_Label: area Attribute_Definition: area of polygon Attribute_Definition_Source: this study Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.000000 Range_Domain_Maximum: 0.014900 Attribute_units_of_measure: degrees square Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: .00001 Attribute_Value_Accuracy_Explanation: estimate of ARC precision Attribute: Attribute_Label: is_cat Attribute_Definition: USGS Circular 891 thickness category code Attribute_Definition_Source: this study Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: internal no-coal area Enumerated_Domain: Enumerated_Domain_Value: 100 Enumerated_Domain_Value_Definition: less than 1.17 feet (14 inches) Enumerated_Domain: Enumerated_Domain_Value: 101 Enumerated_Domain_Value_Definition: 1.17 feet to 2.34 feet Enumerated_Domain: Enumerated_Domain_Value: 102 Enumerated_Domain_Value_Definition: 2.34 feet to 3.5 feet Enumerated_Domain: Enumerated_Domain_Value: 103 Enumerated_Domain_Value_Definition: 3.5 feet to 7.0 feet Enumerated_Domain: Enumerated_Domain_Value: 104 Enumerated_Domain_Value_Definition: greater than 7.0 feet Enumerated_Domain_Value_Definition_Source: USGS 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; c9125is.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 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