Shaffer, B.N. 0000-0002-8787-7504 2022 tabular digital data https://doi.org/10.5066/P9FHHH4T Brian N. Shaffer 2021 publication n/a US Geological Survey https://doi.org/10.3133/ofr20201135 The data set contains location, depth, and geologic data from drill holes penetrating the Paleocene Fort Union Formation in the Williston Basin in Dunn County in western North Dakota. The purpose of compiling this data is to provide refined correlations for lignite beds in the Paleocene Fort Union Formation. The refined correlations were compiled as part a study for the Bureau of Land Management (BLM) showing the areal extent of potentially economic lignite and leonardite beds in the Williston Basin in North Dakota. Carlson 2021 Mining, 2021, Build 210126: Carlson Software, Maysville, KY. Ferm, J.C. and Smith, G.C., N.D., A Guide to Cored Rocks in the Pittsburgh Basin, Department of Geology, University of South Carolina, 109 p. 2021 ground condition Complete None planned -103.1214 -102.1196 47.7284 46.9659 ISO 19115 Topic Category geoscientificInformation Central Energy Resources Science Center General lignite beds drill hole data Williston Basin Fort Union Formation Beulah-Zap coal bed Dunn Center coal bed Harmon coal bed Hanson coal bed HT Butte coal bed Garner Creek coal bed USGS Metadata Identifier USGS:6230b8e1d34ec9f19eeaf436 Central Energy Resources Science Center General Place Terms Dunn County western North Dakota None. Please see 'Distribution Info' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Brian N Shaffer U.S. Geological Survey, ROCKY MOUNTAIN REGION Supervisory Geologist mailing address

Mail Stop 939, W 6th Ave Kipling St

Lakewood CO 80225 US 303-236-5550 bshaffer@usgs.gov https://www.sciencebase.gov/catalog/file/get/6230b8e1d34ec9f19eeaf436?f=__disk__c8%2F3d%2F02%2Fc83d0204b3e642bf15dd5a3b159cfe0d108e2087 Dunn County Browse Graphic JPEG Please see larger work Please see larger work Please see larger work The original drill hole data were uploaded from the National Coal Resources Data System (NCRDS) database (available at https://www.usgs.gov/centers/eersc/science/national-coal-resources-data-system-ncrds?qt-science_center_objects=0#qt-science_center_objects) into a geologic database in Carlson 2021 Mining (2021). Coal beds correlations were edited or modified, where necessary, in Carlson 2021 Mining, based on numerous geologic cross-sections constructed through the study area. The data were then downloaded from the Carlson 2021 Mining database into a formatted Excel spreadsheet. Strata names for lithologies are based on industry-standard Ferm codes (Ferm and Smith, ND). Coal bed thicknesses, cumulative coal thickness, and cumulative stripping ratios were calculated in the spreadsheet. 2021 Universal Transverse Mercator 13 0.9996 -105.0 0.0 500000.0 0.0 coordinate pair 0.6096 0.6096 meters North American Datum of 1983 (NAD 83) Geodetic Reference System 1980 6378137.0 298.257222101 Please see column descriptions included in dataset for detailed column descriptions Ferm, J.C. and Smith, G.C., N.D., A Guide to Cored Rocks in the Pittsburgh Basin, Department of Geology, University of South Carolina, 109 p. GS ScienceBase U.S. Geological Survey mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P9FHHH4T None 20250410 Gregory Gunther U.S. Geological Survey, ROCKY MOUNTAIN REGION information Technology Specialist mailing address

Mail Stop 939, W 6th Ave Kipling St

Lakewood CO 80225 US 303-236-5884 303-236-0459 datamgt@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999