Micah A. Hernandez Jeffrey L. Mauk Sara C. Gonzalez 20250627 vector digital data U.S. Geological Survey data release DOI: 10.5066/P1KPH8TE Additional information about Originators: Hernandez, M.A., https://orcid.org/0000-0002-9656-0832; Mauk, J.L., https://orcid.org/0000-0002-6244-2774; Gonzalez, S.C., https://orcid.org/0009-0007-0461-5773 Suggested citation: Hernandez, M.A., Mauk, J.L., and Gonzalez, S.C., 2025, Geologic map database of the Bison Range and vicinity, northwestern Montana: U.S. Geological Survey data release, https://doi.org/10.5066/P1KPH8TE. https://doi.org/10.5066/P1KPH8TE This U.S. Geological Survey (USGS) data release provides a digital geospatial database for the Bison Range and surrounding area on the Flathead Reservation, northwestern Montana. Attribute tables and geospatial features (points, lines, and polygons) conform to the Geologic Map Schema (USGS NCGMP, 2020) and represent the geology for the 150 square kilometer, geologically complex map area, at a publication scale of 1:24,000. The map covers parts of Sanders and Lake Counties, Montana. All bedrock units exposed in the map area are metasedimentary rocks of the Mesoproterozoic Belt Supergroup that we mapped using a combination of field work and structural contouring. Surficial map units include Holocene alluvial and colluvial deposits, and Pleistocene glacial deposits. Previous mapping of surficial deposits (Ostenaa, 1990) was refined using high-resolution lidar from the USGS 3D Elevation Program. References: Ostenaa, D.A., 1990, Flathead Reservation regional seismotectonic study: an evaluation for dam safety: U.S. Bureau of Reclamation Seismotectonic Report 1990-8. U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema) - A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, book 11, chap. B10, 74 p., https://doi.org//10.3133/tm11B10. The purpose of this data release is to provide a Geologic Map Schema (GeMS)-compliant database for new geologic mapping of the Bison Range, northwestern Montana. These geospatial data will be used to update the geologic map of the Wallace 1 degree x 2 degrees quadrangle, that was originally published as U.S. Geological Survey Miscellaneous Investigations Series Map I-1509-A (Harrison and others, 1986). Development and publication of modern GIS data for geologic maps is foundational and high priority to the USGS Mineral Resources Program (MRP) to facilitate on-going research and other activities pertaining to critical mineral deposits as well as to other geologic and geophysical mapping efforts, petrologic studies, and mineral resource assessments. Harrison, J.E., Griggs, A.B., and Wells, J.D., 1986, Geologic and structure maps of the Wallace 1 degree x 2 degrees quadrangle, Montana and Idaho: U.S. Geological Survey Miscellaneous Investigations Series Map I-1509-A, https://doi.org/10.3133/i1509A. BisonRange.gdb is a composite geodataset that conforms to "GeMS (Geologic Map Schema) - A standard format for the digital publication of geologic maps," available at http://ngmdb.usgs.gov/Info/standards/GeMS/. A shapefile version of the dataset is also available. It consists of shapefiles, DBF files, and delimited text files and retains all information in the native geodatabase, but some programming will likely be necessary to assemble these components into usable formats. The Esri file geodatabase (BisonRange.gdb) contains the following elements: --Geologic map: feature dataset (subdirectory) containing the following feature classes (GIS layers): ----CartographicLines: line layer representing the extent of the Bison Range map area. ----ContactsAndFaults: line layer representing locations of contacts and faults. ----DataSourcePolys: polygon layer representing the data sources and (or) references used within the map boundary ----MapUnitPolys: polygon layer representing the distribution of geologic map units. ----OrientationPoints: point layer representing structure measurements for bedding attitudes. --DataSources: table that lists sources and (or) references used to derive spatial features (points, lines, and polygons) and attribute information. --DescriptionOfMapUnits: table of map unit descriptions. The hierarchical order of map units is coded in the HierarchyKey field. --GeoMaterialDict: table that defines and lists lithology terms in hierarchical order used in the GeoMaterial field of the DescriptionOfMapUnits table. The standard vocabulary is available in Appendix 1 of the GeMS documentation (USGS NCGMP, 2020). --Glossary: table that defines and lists sources of terms used in the database. Reference: U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)- A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, book 11, chap. B10, 74 p., https://doi.org//10.3133/tm11B10. 20220912 20250627 ground condition Complete None planned -114.2917 -114.1250 47.3750 47.2708 ISO 19115 Topic Category geoscientificInformation USGS Thesaurus bedrock geologic units geographic information systems geologic maps geology geospatial datasets structural geology None U.S. Geological Survey USGS Mineral Resources Program MRP Geology, Geophysics, and Geochemistry Science Center GGGSC National Cooperative Geologic Mapping Program NCGMP National Geologic Map Database NGMDB Geologic Map Schema GeMS USGS Metadata Identifier USGS:6658be93d34ef3137d35fa26 Geographic Names Information System (GNIS) Lake County Sanders County Common geographic areas Montana MT None. Please see 'Distribution Info' for details. These data are intended for use at approximately 1:24,000-scale or smaller. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Jeffrey L Mauk U.S. Geological Survey, Rocky Mountain Region Research Geologist mailing address

P.O. Box 25046, Mail Stop 973, W 6th Ave Kipling St

Lakewood CO 80225 US 303-236-5605 jmauk@usgs.gov Work was accomplished by the U.S. Geological Survey Geology, Geophysics, and Geochemistry Science Center (GGGSC) with support from the Mineral Resources Program (MRP) and the FEDMAP component of the National Cooperative Geologic Mapping Program. Microsoft Windows 10 Enterprise, Version 10 (Build 18363); Esri ArcGIS Pro 3.2.2 Unique values in attribute fields were checked through frequency analyses. The unique values in each attribute field were reviewed and checked for spelling, consistency of terms, accuracy, adherence to established vocabularies, and completeness. Text terms and values entered by USGS authors were reviewed and verified. Confidence that a feature exists and confidence that a feature is correctly identified are described in per-feature attributes ExistenceConfidence and IdentityConfidence. GIS layer and attribute information were translated into the GeMS database structure. Attribute values were modified for consistency with GeMS terminology. Topology tests were conducted on polygon and line feature classes to ensure spatial integrity of the data. The dataset is considered complete for the information presented and as described in the abstract. Horizontal accuracy of point, line, and polygon features is dependent on the method of geologic mapping and data collection. Consequently, estimated accuracy of horizontal location is given on a per-feature basis using the LocationConfidenceMeters field. Vertical accuracy testing does not apply to this dataset. Jeffrey D. Lonn Larry N. Smith Robin B. McCulloch 2007 vector digital data Montana Bureau of Mines and Geology Open-File Report 554 Butte, Montana Montana Bureau of Mines and Geology Suggested citation: Lonn, J.D., Smith, L.N., and McCulloch, R.B., 2007, Geologic map of the Plain 30' x 60' quadrangle, western Montana: Montana Bureau of Mines and Geology Open-File Report 554, scale 1:100,000, https://mbmg.mtech.edu/mbmgcat/public/ListCitation.asp?pub_id=30066&#gsc.tab=0 https://mbmg.mtech.edu/mbmgcat/public/ListCitation.asp?pub_id=30066&#gsc.tab=0 100000 Digital and/or Hardcopy 2007 publication date Lonn and others (2007) Used to calculate thicknesses of the lower, middle, and upper members of the Revett Formation on the Bison Range. Thicknesses were used to split up the Revett Formation where we previously mapped it as a single undivided unit. Dean A. Ostenaa 1990 vector digital data U.S. Bureau of Reclamation Seismotectonic Report 1990-8 Denver, Colorado U.S. Bureau of Reclamation Suggested citation: Ostenaa, D.A., 1990, Flathead Reservation regional seismotectonic study: an evaluation for dam safety: U.S. Bureau of Reclamation Seismotectonic Report 1990-8. 24000 Digital and/or Hardcopy 1990 publication date Ostenaa (1990) Used to identify surficial (Quaternary) map units within the map area. Contacts between surficial units were redrawn based on interpretation of USGS 3D Elevation Program (3DEP) lidar data and Esri satellite imagery. Klaus K.E. Neuendorf James P. Mehl, Jr. Julia A. Jackson 2011 fifth publication Alexandria, Virginia American Geological Institute Suggested citation: Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., 2011, Glossary of Geology (5th ed.): Alexandria, Va., American Geological Institute, 779 p. Digital and/or Hardcopy 2011 publication date Neuendorf and others (2011) Definitions of some attributes. U.S. Geological Survey National Cooperative Geologic Mapping Program 2020 publication U.S. Geological Survey Techniques and Methods book 11, chapter B10 Reston, Virginia U.S. Geological Survey Suggested citation: U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema) - A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, book 11, chap. B10, 74 p., https://doi.org/10.3133/tm11B10 https://doi.org/10.3133/tm11B10 Digital and/or Hardcopy 2020 publication date USGS NCGMP (2020) Database schema and some attribute definitions. Federal Geographic Data Committee 2006 publication Reston, Virginia Federal Geographic Data Committee Suggested citation: Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates, https://ngmdb.usgs.gov/fgdc_gds/geolsymstd.php. https://ngmdb.usgs.gov/fgdc_gds/geolsymstd.php Digital and/or Hardcopy 2006 publication date FGDC (2006) Standardized geologic map symbolization used for symbolizing the map. USGS authors, J. Mauk and M. Hernandez, conducted field work September, 2022, and July, 2023 to map the distribution of bedrock geologic units, locate faults, and to collect structural data. Structural data collected in the field were used to calculate average bedding orientations for the map area. The average strike and dip of bedding was used to create 40-foot structural contours of contacts between bedrock geologic units. Contacts that were identified in the field were projected across the map area using these structural contours. Some faults were located in the field, and others were inferred where projected contacts did not match field observations. 2023 Mapping by Ostenaa (1990) was used to identify surficial deposits within the map area. Contacts between surficial geologic units were modified by USGS authors using 1-m and 10-m lidar from the U.S. Geological Survey 3-D Elevation Program (3DEP) and Esri satellite imagery. Mapping by Lonn and others (2007) was used to calculate thicknesses of the lower, middle, and upper members of the Revett Formation on the Bison Range. Contacts between these members were drawn based on the calculated thicknesses and structural contours that were used to map contacts between other formations in the map area. GeMS geodatabase feature classes and tables were populated with additional information as required. Definitions of these values are derived from USGS authors, USGS NCGMP (2020), and from the Glossary of Geology (Neuendorf and others, 2011). Map unit colors were chosen as best possible and are represented as RGB values in the AreaFillRGB field of the DescriptionOfMapUnits table. Map unit colors are also provided in the custom Esri style file. Geologic map symbolization was chosen using FGDC Digital Cartographic Standard for Geologic Map Symbolization (FGDC, 2006) and standardized across the entire map area. These values are represented in the Symbol attribute fields and are provided in the included Esri Style file. Topology tests were conducted on polygon and line feature classes to ensure spatial integrity of the data. The geodatabase was confirmed to be GeMS compliant using the validation tools. Ostenaa (1990) Lonn and others (2007) USGS NCGMP (2020) Neuendorf and others (2011) FGDC (2006) 2024 Vector Entity Point 43 G-polygon 161 String 294 Albers Conical Equal Area 29.5 45.5 -96.0 23.0 0.0 0.0 coordinate pair 0.6096 0.6096 meters North_American_Datum_1983 GRS 1980 6378137.0 298.257222101 Attribute Fields The attribute fields contain attribute information associated with features or records in the data set. The translated shapefile field name that is limited to 10 characters is provided in square brackets as needed. Attribute fields occur in data layer(s) and/or tables noted in parentheses. USGS Authors Age (DescriptionOfMapUnits) Age of map unit as shown in Description of Map Units. USGS NCGMP (2020) Example of values: "Mesoproterozoic" AreaFillPatternDescription [PatDes] (DescriptionOfMapUnits) Text description (for example, "random small red dashes") provided as a convenience for users who must recreate symbolization. USGS NCGMP (2020) All values NULL AreaFillRGB [RGD] (DescriptionOfMapUnits) {Red, Green, Blue} tuples that specify the suggested color (for example, "255,255,255", "124,005,255") of area fill for symbolizing MapUnit. Each color value is an integer between 0 and 255, values are zero-padded to a length of 3 digits, and values are separated by commas with no space: NNN,NNN,NNN. USGS NCGMP (2020) Example of values: "151,219,242" Azimuth (OrientationPoints) Strike or trend, measured in degrees clockwise from geographic North. Use right-hand rule (dip is to right of azimuth direction). Horizontal planar features may have any azimuth. USGS NCGMP (2020) 295 351 degrees (angular measure) ContactsAndFaults_ID [CAFs_ID] (ContactsAndFaults) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP (2020) Values are unique within this database. Example of values: "CAF001" DataSources_ID [DatSrc_ID] (DataSources) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP (2020) DAS1 This report Hernandez, M.A., Mauk, J.L., and Gonzalez, S.C., 2025, Geologic map database of the Bison Range and vicinity, northwestern Montana: U.S. Geological Survey data release, https://doi.org/10.5066/P1KPH8TE. DAS2 Ostenaa (1990) Ostenaa, D. A., 1990, Flathead Reservation regional seismotectonic study: an evaluation for dam safety: U.S. Bureau of Reclamation Seismotectonic Report 1990-8. DAS3 Lonn and others (2007) Lonn, J.D., Smith, L.N., and McCulloch, R.M., 2007, Geologic map of the Plains 30' x 60' quadrangle, western Montana: Montana Bureau of Mines and Geology Open-File Report 554, https://www.mbmg.mtech.edu/mbmgcat/public/ListCitation.asp?pub_id=30066&#gsc.tab=0. DAS4 USGS NCGMP (2020) U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema) - A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, book 11, chap. B10, 74p., https://doi.org/10.3133/tm11B10. DAS5 Neuendorf and others (2011) Neuendorf, K.K.E., Mehl Jr., J.P., and Jackson, J.A., 2011, Glossary of Geology (fifth edition): American Geological Institute, Alexandria, Virginia, 779 p. DAS6 Winston (2007) Winston, D., 2007, Revised stratigraphy and depositional history of the Helena and Wallace Formations, Mid-Proterozoic Piegan Group, Belt Supergroup, Montana and Idaho, U.S.A, in Link, P. K., and Lewis, R. S., eds., Proterozoic Geology of Western North America and Siberia, Volume 86, SEPM (Society for Sedimentary Geology) Special Publication Volume 86, p. 65-100, https://doi.org/10.2110/pec.07.86.0065. DAS7 Mauk and White (2004) Mauk, J.L., and White, B.G., 2004, Stratigraphy of the Proterozoic Revett Formation and its control on Ag-Pb-Zn vein mineralization in the Coeur d'Alene District, Idaho: Economic Geology, v. 99, no. 2, p. 295-312. DAS8 Harrison and others (1986) Harrison, J.E., Griggs, A.B., and Wells, J.D., 1986, Geologic and structure maps of the Wallace 1 degree x 2 degrees quadrangle, Montana and Idaho: U.S. Geological Survey Miscellaneous Investigations Series Map I-1509-A, 2 sheets, 1:250,000 scale, https://doi.org/10.3133/i1509A. DAS9 Cressman (1989) Cressman, E.R., 1989, Reconnaissance stratigraphy of the Prichard Formation (Middle Proterozoic) and the early development of the Belt Basin, Washington, Idaho, and Montana: U.S. Geological Survey Professional Paper 1490, 80 p., https://doi.org/10.3133/pp1490. DataSourceID [DatSrcID] (CartographicLines, ContactsAndFaults, MapUnitPolys) Source(s) of data; alpha-numeric value used to link to DataSources table (foreign key). USGS NCGMP (2020) Values are unique within this database. Multiple values concatenated. Examples of values: "DAS1" and "DAS1 | DAS2"; see DataSources_ID attribute information. Definition (GeoMaterialDict, Glossary) Plain-language definition. USGS NCGMP (2020) Example of values: "A discrete surface or zone of discrete surfaces separating two rock masses across which one mass has slid past the other." DefinitionSourceID [DefSrcID] (Glossary) Source of definition; alpha-numeric value used to link to DataSources table (foreign key). USGS NCGMP (2020) DAS1 This report See DataSources_ID attribute information. DAS4 USGS NCGMP (2020) See DataSources_ID attribute information. DAS5 Neuendorf and others (2011) See DataSources_ID attribute information. Description [Descr] (DescriptionOfMapUnits, ContactsAndFaults) Free-format text description of map unit or the Type and certainty of a line feature. Commonly structured according to one or more accepted traditions (for example, lithology, thickness, color, weathering and outcrop characteristics, distinguishing features, genesis, age constraints). USGS NCGMP (2020) Example of values from ContactsAndFaults feature class: "contact, certain" Example of values from DescriptionOfMapUnits table: "Gravel, sand, silt, and minor clay deposited along modern stream channels and floodplains. Moderately to well sorted. Thickness of deposits range from 0 to 4 m." DescriptionOfMapUnits_ID [DMapUns_ID] (DescriptionOfMapUnits) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP (2020) Values are unique within this database. Example of values: "DMU01" DescriptionSourceID [DesSrcID] (DescriptionOfMapUnits) Source(s) of map unit description; alpha-numeric value used to link to DataSources table (foreign key). USGS NCGMP (2020) Values are unique within this database. Multiple values concatenated. Examples of values: "DAS01" and "DAS1 | DAS7 | DAS8"; see DataSources_ID attribute information. ExistenceConfidence [ExiConf] (ContactsAndFaults) Confidence that feature exists. USGS NCGMP (2020) certain Identity of a feature can be determined using relevant observations and scientific judgment; therefore, one can be reasonably confident in the credibility of this interpretation. USGS NCGMP (2020) questionable Identity of a feature cannot be determined using relevant observations and scientific judgment; therefore, one cannot be reasonably confident in the credibility of this interpretation. For example, IdentityConfidence = questionable is appropriate when a geologist reasons "I can see some kind of planar feature that separates map units in this outcrop, but I cannot be certain if it is a contact or a fault." USGS NCGMP (2020) unspecified Used for the boundary of a map where no confidence is specified. USGS NCGMP (2020) FullName (DescriptionOfMapUnits) Name of map unit including identification of containing higher rank unit(s). USGS NCGMP (2020) Example of values: "Burke Formation" GeoMaterial [GeoMat] (DescriptionOfMapUnits, GeoMaterialDict) Categorization of map unit based on lithologic and genetic character; term selected from NGMDB standard term list defined in Appendix 1 of GeMS documentation. USGS NCGMP (2020) Example of values: "--------Alluvial Sediment, mostly coarse-grained" GeoMaterialConfidence [GeoMatConf] (DescriptionOfMapUnits) Describes appropriateness of GeoMaterial term for describing the map unit. USGS NCGMP (2020) High The term and definition adequately characterize the overall lithologic nature of rocks and sediments in the map unit. Regarding the subjective term "adequately characterize", we refer to context and objectives of this classification as described in the GeMS documentation. USGS NCGMP (2020) Medium The term and definition generally characterize the overall lithology of the map unit, but there are one or more significant minor lithologies that are not adequately described by the selected term. USGS NCGMP (2020) Glossary_ID [Glo_ID] (Glossary) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP (2020) Values are unique within this database. Example of values: "GLO01" HierarchyKey [HKey] (DescriptionOfMapUnits, GeoMaterialDict) String that records hierarchical structure. Has form nn-nn-nn, nnn-nnn, or similar. Numeric, left-padded with zeros, dash-delimited. Each HierarchyKey fragment of each row MUST be the same length to allow text-based sorting of table entries. USGS NCGMP (2020) Example of values: "02-01" IdentityConfidence [IdeConf] (ContactsAndFaults, MapUnitPolys, OrientationPoints) Confidence that feature is correctly identified. USGS NCGMP (2020) certain Identity of a feature can be determined using relevant observations and scientific judgment; therefore, one can be reasonably confident in the credibility of this interpretation. USGS NCGMP (2020) questionable Identity of a feature cannot be determined using relevant observations and scientific judgment; therefore, one cannot be reasonably confident in the credibility of this interpretation. For example, IdentityConfidence = questionable is appropriate when a geologist reasons "I can see some kind of planar feature that separates map units in this outcrop, but I cannot be certain if it is a contact or a fault." USGS NCGMP (2020) unspecified Used for the boundary of a map where no confidence is specified. USGS NCGMP (2020) Inclination [Inc] (OrientationPoints) Dip or plunge, measured in degrees down from horizontal. USGS NCGMP (2020) 20 64 degrees (angular measure) IndentedName [IndNam] (GeoMaterialDict) Name with addition of leading spaces to help show rank within a hierarchical list. USGS NCGMP (2020) Examples of values: "Sedimentary material" or "------Silt and clay of unspecified origin" IsConcealed [IsCon] (ContactsAndFaults) Flags for contacts and faults covered by overlying map unit. USGS NCGMP (2020) N No USGS NCGMP (2020) Y Yes USGS NCGMP (2020) Label (DescriptionOfMapUnits, CartographicLines, ContactsAndFaults, MapUnitPolys, OrientationPoints) Plain-text equivalent of the desired annotation for a feature: for example, "14 Ma", or "^c" which (when used with the FGDC GeoAge font) results in the geologic map-unit label TRc (with TR run together to make the Triassic symbol). USGS NCGMP (2020) Examples of values: "Yb" or "Flathead River" LocationConfidenceMeters [LocConfM] (ContactsAndFaults, OrientationPoints) Estimated half-width in meters of positional uncertainty envelope; position is relative to other features in database. USGS NCGMP (2020) 0 200 meters LocationSourceID [LocSrcID] (OrientationPoints) Source of location; alpha-numeric value used to link to DataSources table (foreign key). USGS NCGMP (2020) DAS1 This report See DataSources_ID attribute information. MapUnit (DescriptionOfMapUnits, MapUnitPolys, OrientationPoints) Short plain-text identifier of the map unit. Used to link to DescriptionOfMapUnits table (foreign key). USGS NCGMP (2020) Qaf Alluvial fan deposits This report Qal Alluvial deposits This report Qca Colluvial deposits This report Qcls Landslide deposits This report Qfg Glacial flood deposits This report Qgo Glacial outwash This report Qlf Glacial lake deposits This report Qt Glacial till This report water water This report Yb Burke Formation This report Ye Empire Formation This report Ypn Piegan Group, undivided This report Yrl Lower member of the Revett Formation, informal This report Yrm Middle member of the Revett Formation, informal This report Yru Upper member of the Revett Formation, informal This report Ysr St. Regis Formation This report MapUnitPolys_ID [MUPs_ID] (MapUnitPolys) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP (2020) Values are unique within this database. Example of values: "MUP001" Name (DescriptionOfMapUnits) Name of map unit, as shown in boldface in traditional description of map units. Identifies unit within its hierarchical context. USGS NCGMP (2020) Examples of values: "Burke Formation" or "Alluvial deposits" Notes (DataSources, CartographicLines, ContactsAndFaults, MapUnitPolys, OrientationPoints) Additional information specific to a particular feature or table entry. USGS NCGMP (2020) Free text. Values of <Null> indicate no entry. OBJECTID [OID] [FID] (all) Object identification: an Esri default field that contains an integer value to uniquely identify a row in an attribute table. Esri sequential integer values, CSV files may be auto populated with -1. OrientationConfidenceDegrees [OriConDeg] (OrientationPoints) Estimated angular precision of combined azimuth and inclination measurements, in degrees. USGS NCGMP (2020) 5 5 degrees USGS authors OrientationPoints_ID [OriPoi_ID] (OrientationPoints) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP (2020) Values are unique within this database. Example of values: "ORP01" OrientationSourceID [OriSrcID] (OrientationPoints) Source of orientation data; alpha-numeric value used to link to DataSource table (foreign key). USGS NCGMP (2020) DAS1 This report See DataSources_ID attribute information. ParagraphStyle [ParaSty] (DescriptionOfMapUnits) Token that identifies formatting of paragraph(s) within traditional Description of Map Units that correspond to this table entry. USGS NCGMP (2020) DMU1 Paragraph style for formatted description of a first-rank map unit within Description of Map Units table. Times New Roman, Regular, 10 pt, 12 pt leading, left justified, 66 pt left indent, -20 pt 1st line indent, 3 pt space before. USGS NCGMP (2020) DMU2 Paragraph style for formatted description of a second-order map unit within Description of Map Units table. Such map units are subsidiary to (commonly subdivisions of) first-order map units. Times New Roman, Regular, 10 pt, 12 pt leading, left justified, 66 pt left indent, -10 pt 1st line indent, 3 pt space before. USGS NCGMP (2020) Heading2 Heading style for second-order headings within Description of Map Units table. Such headings are subsidiary to the primary heading "Description of Map Units". Times New Roman, Bold, 10 pt, 12 pt leading, all caps, centered, 12 pt space before. USGS NCGMP (2020) PlotAtScale [PlotAtSca] (OrientationPoints) Scale at which the observation should be plotted. Value is scale of the map. USGS NCGMP (2020) Positive real number. Using map publication scale of 24000. Shape (CartographicLines, ContactsAndFaults, DataSourcePolys, MapUnitPolys) An Esri default field that contains the geometry type (point, line, polygon). Esri Point Geometry type is a point. Esri Polygon Geometry type is a polygon. Esri Polyline Geometry type is a line. Esri Shape_Area (DataSourcePolys, MapUnitPolys) An Esri default field that contains the area of a polygon. The value is automatically generated in units of the feature class. Esri 13.512141 145911327.496734 square meters 0.0001 Shape_Length [Shp_Len] (CartographicLines, ContactsAndFaults, DataSourcePolys, MapUnitPolys) An Esri default field that contains the length of a line or perimeter. The value is automatically generated in the units of the feature class. Esri 6.123637 48374.165356 meters 0.0001 Source (DataSources) Plain-text short description that identifies the data source. USGS NCGMP (2020) Example of values: "This report" or "Neuendorf and others (2011)" StationsID (OrientationPoints) Unique alpha-numeric value used to link to Stations point feature class (foreign key) (not used in this geodatabase). USGS NCGMP (2020) All values are NULL. No values entered. Symbol (DescriptionOfMapUnits, CartographicLines, ContactsAndFaults, MapUnitPolys, OrientationPoints) Reference to a point marker, line symbol, or area-fill symbol that is used on the map graphic to denote the feature: perhaps a star for a K-Ar age locality, or a heavy black line for a fault. USGS NCGMP (2020) Example of values from ContactsAndFaults: "01.01.01" Example of values from MapUnitPolys: "Yb" Term (Glossary) Plain-language word for a concept. Values are unique within database as a whole. USGS NCGMP (2020) Examples of values: "High" or "contact" Type (CartographicLines, ContactsAndFaults, OrientationPoints) Classifier that specifies what kind of geologic feature is represented by a database element: that a certain line within feature class ContactsAndFaults is a contact, or thrust fault, or water boundary. USGS NCGMP (2020) bedding The arrangement of sedimentary rocks in beds or layers of varying thickness and character; the general physical and structural character or pattern of the beds and their contacts within a rock mass, such as cross-bedding and graded bedding; a collective term denoting the existence of beds. Also, the structure so produced. Neuendorf and others (2011) Bison Range boundary A line representing the approximate boundary of the Bison Range. This report contact A plane or irregular surface between two types or ages of rock. Neuendorf and others (2011) fault, normal A fault in which the hanging wall has moved downward relative to the footwall. The angle of the fault is usually 45-90 degrees, and in most cases close to 60 degrees. Neuendorf and others (2011) map boundary A line representing the boundary of the mapping area. This report water The outline of a body of water (lake) and/or stream. This report URL (DataSources) Uniform Resource Locator (URL) or Digital Object Identifier (DOI), identifies a document on the World Wide Web. USGS NCGMP (2020) Example of values: "https://doi.org/10.3133/tm11B10" The entity and attribute information provide the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set. The database conforms to the USGS Geologic Map Schema (GeMS) with the minor addition of the field "Description" to the ContactsAndFaults and GeologicLines layer. A full description of the GeMS database structure can be accessed at https://doi.org/10.3133/tm11B10. U.S. Geological Survey - National Geologic Map Database (NGMDB) mailing address

12201 Sunrise Valley Dr., Mail Stop 908

Reston VA 20192 United States 1-888-ASK-USGS (1-888-275-8747) ngmdb@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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P1KPH8TE None 20250627 Jeffrey L Mauk U.S. Geological Survey, Rocky Mountain Region Research Geologist mailing

P.O. Box 25046, Mail Stop 973, W 6th Ave Kipling St

Lakewood CO 80225 US 303-236-5605 jmauk@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998