USGS National Assessment of Oil and Gas Resources Team U.S. Geological Survey U.S. Continuous Resources Assessment Team 2015 Downloadable GIS Data Data Release DR-F7VT1Q4H Denver, Colorado U.S. Geological Survey, Central Energy Resources Science Center https://dx.doi.org/10.5066/F7VT1Q4H USGS National Assessment of Oil and Gas Resources Team U.S. Geological Survey U.S. Continuous Resources Assessment Team 2015 Fact Sheet U.S. Geological Survey Fact Sheet FS-2015-3052 Denver, Colorado U.S. Geological Survey https://pubs.er.usgs.gov/publication/fs20153052 The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set of known or postulated oil and (or) gas accumulations sharing similar geologic, geographic, and temporal properties within the Total Petroleum System, such as source rock, timing, migration pathways, trapping mechanism, and hydrocarbon type. The Assessment Unit boundary is defined geologically as the limits of the geologic elements that define the Assessment Unit, such as limits of reservoir rock, geologic structures, source rock, and seal lithologies. The only exceptions to this are Assessment Units that border the Federal-State water boundary. In these cases, the Federal-State water boundary forms part of the Assessment Unit boundary. The purpose of these files is to define and illustrate the geographic limit and geologic boundaries of the Assessment Units within the defined Total Petroleum Systems, as required for the USGS National Assessment of Oil and Gas Project. The Assessment Units were used as the fundamental units for the assessment of undiscovered oil and gas. The assessment unit boundaries define the combined geologic limits of each Assessment Unit and are described and defined in the text portions of this assessment publication. None 2015 publication date Complete As needed -111.0 -109.0 40.5 39.4 none National Assessment of Oil and Gas USGS World Energy Region 5 Energy Resources Oil Natural Gas Resource Assessment Earth Science Natural Resources U.S. Geological Survey USGS Geology Assessment Unit Unconventional Assessment Unit Continuous Assessment Unit ArcIMS Metadata Server Theme Codes geoscientificInformation Gateway to the Earth draft 9 28-Jun-2002 Oil resources Natural gas resources Economic geology EnergyResourceActivities oilgas noga2000 nogaupiceance USGS Metadata Identifier USGS:5d1bc7aae4b0941bde6211a6 none United States USGS World Energy Region 5 U.S.A. Uteland Butte Marginal Lacustrine Conventional Oil and Gas Uteland Butte Carbonate Continuous Oil none Users of this geospatial database and geologic information derived therefrom should acknowledge the U.S. Geological Survey as the source of the data. Christopher J. Schenk U.S. Geological Survey, Central Energy Resources Science Center Geologist mailing and physical address

U.S. Geological Survey, Box 25046, MS 939, Denver Federal Center

Denver Colorado 80225 USA (303) 236-5796 schenk@usgs.gov https://www.sciencebase.gov/catalog/file/get/5d1bc7aae4b0941bde6211a6?f=__disk__af%2F29%2Fa8%2Faf29a85b553da9c4a12f9d246377080fa73f6aa4 USGS Uteland Butte AUs (2015) JPEG https://pubs.usgs.gov/dds/dds-069/ or the USGS Fact Sheets that are available for each Province at the National Oil and Gas Assessment website - https The Assessment Unit boundary was defined on the basis of the surface and subsurface geology of the petroleum system elements, and oil and gas production, shows, and seeps related to the Assessment Unit. The province geologist was required to defend the geologic boundaries of each Assessment Unit in a formal geologic and petroleum system review meeting. The Assessment Unit was mapped in part on the data contained in the IHS Energy Group, WHCS data base for wells, and the Nehring Significant Oil and Gas Field File. The Assessment Unit boundary represents the gross boundary of the combined geologic elements that comprise the Total Petroleum System. The Assessment Unit boundary was mapped by the province geologist and the boundary line digitally transferred using ArcGIS. The province geologist mapped the Assessment Unit boundary on a hard copy or digital base map that contained data from IHS Energy Group, WHCS data base for wells, and the Nehring Significant Oil and Gas Field File. The province geologist then plotted all other available geologic, geophysical and geochemical data and information on the base map to assist in mapping the Assessment Unit boundary. Following review, the Assessment Unit boundary was digitally captured from the hard copy or digital base map using ArcGIS. 2014 The attributes were added from the assessment output data file. These assessment results attributes are published on the National Assessment of Oil and Gas Fact Sheet for each Province. 2015 Vector Complete chain Entity point GT-polygon composed of chains Point 0.000001 0.000001 Decimal degrees World Geodetic System (WGS) of 1984 Geodetic Reference System 80 6378137.0 298.257223 au"assessunitnum and abbreviated name" Polygon Attribute Table. For each assessment unit, "assessunitnum" is replaced with the assessment unit number, and is followed by an abbreviation of the assessment unit name. U.S. Geological Survey REG_NUM Region Number U.S. Geological Survey Energy Resource World Regions 5 North America common knowledge REG_NAME Region Name U.S. Geological Survey Energy Resource World Regions North America country common knowledge PROVCODE Province Code U.S. Geological Survey Energy Resource Provinces 72 provinces numbered 1 to 72 PROV_NAME Province Name U.S. Geological Survey Energy Resource Provinces https://energy.cr.usgs.gov/oilgas/noga/index.html TPSCODE Total Petroleum System Code U.S. Geological Survey Energy Resource Total Petroleum Systems https://energy.cr.usgs.gov/oilgas/noga/index.html TPSNAME Total Petroleum System Name U.S. Geological Survey Energy Resource Total Petroleum Systems https://energy.cr.usgs.gov/oilgas/noga/index.html ASSESSCODE Assessment Unit Code U.S. Geological Survey Energy Resource Assessment Units https://energy.cr.usgs.gov/oilgas/noga/index.html ASSESSNAME Assessment Unit Name U.S. Geological Survey Energy Resource Assessment Units https://energy.cr.usgs.gov/oilgas/noga/index.html U.S. Geological Survey GS ScienceBase mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Downloadable Data Although these data have been processed successfully on a computer system at the U.S. Geological Survey, 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. The U.S. Geological survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. These data have been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. ArcGIS Shapefile 10.3.1 Assessment unit geographic features and attribute data https://dx.doi.org/10.5066/F7VT1Q4H The URL above links to a compressed file containing Assessment Unit Boundaries. None These products can be downloaded individually using any one of the Network_Resource_Name URLs above. Each of these URLs provide access to various formats of these data. 20200813 20151112 U.S. Geological Survey, Central Energy Resources Science Center Christopher P. Anderson GIS Analyst (contractor) mailing and physical address

U.S. Geological Survey, Box 25046, MS 939, Denver Federal Center

Denver Colorado 80225 USA 303-236-7773 datamgt@usgs.gov For inquiries regarding this document, please include the metadata contact person's name, dataset name, and publication series and number. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998