Sara C. Gonzalez John D. Horton 20240726 vector digital data Denver, Colorado U.S. Geological Survey Additional information about Originators: Gonzalez, S.C., https://orcid.org/0009-0007-0461-5773; Horton, J.D., https://orcid.org/0000-0003-2969-9073 Suggested citation: Gonzalez, S.C., and Horton, J.D., 2024, GIS data for geologic map of the Bayhorse area, central Custer County, Idaho: U.S. Geological Survey data release, https://doi.org/10.5066/P90ANEBC. https://doi.org/10.5066/P90ANEBC Samuel W. Hobbs William H. Hays David H. McIntyre 1991 publication U.S. Geological Survey Miscellaneous Investigations Series I-1882 Denver, Colorado U.S. Geological Survey Suggested citation: Hobbs, S.W., Hays, W.H., and McIntyre, D.H., 1991, Geologic map of the Bayhorse area, central Custer County, Idaho: U.S. Geological Survey, Miscellaneous Investigations Series Map I-1882, scale 1:62,500, https://doi.org/10.3133/i1882. https://doi.org/10.3133/i1882 This U.S. Geological Survey (USGS) data release provides a digital geospatial database for the geologic map of the Bayhorse area, central Custer County, Idaho (Hobbs and others, 1991). Attribute tables and geospatial features (points, lines, and polygons) conform to the Geologic Map Schema (USGS NCGMP, 2020) and represent the geologic map as published in the USGS Miscellaneous Investigations Series Map I-1882. The 357,167-acre map area represents the geology at a publication scale of 1:62,000. References: Hobbs, S.W., Hays, W.H., and McIntyre, D.H., 1991, Geologic map of the Bayhorse area, central Custer County, Idaho: U.S. Geological Survey, Miscellaneous Investigations Series Map I-1882, scale 1:62,500, https://doi.org/10.3133/i1882. 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 Geologic Map Schema (GeMS)-compliant data for the geologic map of the Bayhorse area, central Custer County, Idaho. 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. Bayhorse_I-1882.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 (Bayhorse_I-1882.gdb) contains the following elements: --GeologicMap: feature dataset (subdirectory) containing the following feature classes (GIS layers): ----CartographicLines: line layer (feature class) representing the location of a cross section. ----ContactsAndFaults: line layer representing locations of contacts and faults. ----GeologicLines: line layer representing the locations of dikes, fold axes, and other linear features. ----MapUnitPolys: polygon layer representing the distribution of geologic map units. ----OrientationPoints: point layer representing the location of measured planar features. ----OverlayPolys: polygon layer representing the location of hydrothermal alteration. --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 derived from the collar of the geologic map or geologic map pamphlet. 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 standardized vocabulary is available in Appendix 1 of the GeMS documentation. --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. 20240726 publication date Complete None planned -114.5452 -114.0010 44.5219 44.1239 ISO 19115 Topic Category geoscientificInformation USGS Thesaurus bedrock geologic units geospatial datasets geographic information systems geology geologic maps 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:656a22d0d34e6dde1a4ae43c Geographic Names Information System (GNIS) Custer County Common geographic areas Idaho ID None. Please see 'Distribution Info' for details. These data are intended for use at approximately 1:62,500-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. John D. Horton U.S. Geological Survey, ROCKY MOUNTAIN REGION Physical Scientist mailing address

Mail Stop 973, W 6th Ave Kipling St

Lakewood CO 80225 US 303-236-1921 303-236-3200 jhorton@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 22H2 (Build 19045.3693); Esri ArcGIS Pro 3.1.3 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 digitized and extracted directly 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. Polygon, line, and point features were digitized from the I-1882 map and quality assured for completeness. Textual information from the original printed map 'Description of Map Units' section was transcribed into the DescriptionOfMapUnits table. Horizontal accuracy of point, line, and polygon features is dependent on the accuracy of the 1:62,500 scale source map. Map publication techniques employed in 1991 resulted in variable line quality and accuracy. Estimated accuracy of horizontal location, provided on a per-feature basis in the attribute field LocationConfidenceMeters in GeMS, was assigned a value of -9 indicating unknown. Vertical accuracy testing does not apply to this dataset. Samuel W. Hobbs William H. Hays David H. McIntyre 1991 publication U.S. Geological Survey Miscellaneous Investigations Series I-1882 Denver, Colorado U.S. Geological Survey Suggested citation: Hobbs, S.W., Hays, W.H., and McIntyre, D.H., 1991, Geologic map of the Bayhorse area, central Custer County, Idaho: U.S. Geological Survey, Miscellaneous Investigations Series Map I-1882, scale 1:62,500, https://doi.org/10.3133/i1882. https://doi.org/10.3133/i1882 Hardcopy 1991 publication date Hobbs and others, 1991 Original published geologic map. Georeferenced image from the National Cooperative Geologic Mapping Program (NCGMP) accessed 2023 at: https://ngmdb.usgs.gov/Prodesc/proddesc_9967.htm 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. 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. Federal Geographic Data Committee 2006 publication Reston, Virginia prepared for the Federal Geographic Data Committee by the U.S. Geological Survey 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. The data were captured by staff at East View Geospatial by heads-up digitizing of the georeferenced version (compressed GeoTiff) of the Hobbs and others (1991) printed geologic map obtained from the National Geologic Map Database and saved as an Esri file geodatabase in GeMS format. Hobbs and others, 1991 2022 Attributes were populated to conform to the Geologic Map Schema (GeMS) standard for geologic map publications (USGS NCGMP, 2020). Definitions of these values are derived from the printed map (Hobbs and others, 1991), USGS authors, GeMS (USGS NCGMP, 2020), and from the Glossary of Geology (Neuendorf and others, 2011). Map unit colors were matched to the original publication 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 also matched to the original publication as best possible using the FGDC Digital Cartographic Standard for Geologic Map Symbolization (FGDC, 2006). These values are provided in the Symbol attribute fields and 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 validation tools. USGS NCGMP, 2020 Hobbs and others, 1991 Neuendorf and others, 2011 FGDC, 2006 2023 Vector Entity point 1649 G-polygon 1877 String 5983 Universal Transverse Mercator 11 0.9996 -117.0 0.0 500000.0 0.0 coordinate pair 0.6096 0.6096 meters North_American_Datum_1927 Clarke 1866 6378206.4 294.978698213898 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 Examples of values: "Holocene" or "Upper Mississippian" AreaFillPatternDescription [PatDes] (DescriptionOfMapUnits) Text description (for example, "random small red dashes") provided as a convenience for users who must recreate symbolization. USGS NCGMP, 2020 Example of values: "randomly distributed magenta dashes" AreaFillRGB [RGB] (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: "193,213,110" 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 0 359 degrees (angular measure) CartographicLines_ID [CarLin_ID] (CartographicLines) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP, 2020 Values are unique within this database. Example of values: "CAL1" 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: "CAF0001" DataSources_ID [DatSrc_ID] (DataSources) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP, 2020 DAS01 Hobbs and others, 1991 Hobbs, S.W., Hays, W.H., and McIntyre, D.H., 1991, Geologic map of the Bayhorse area, central Custer County, Idaho: U.S. Geological Survey, Miscellaneous Investigations Series Map I-1882, scale 1:62,500, https://pubs.usgs.gov/publication/i1882. DAS02 Neuendorf and others, 2011 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, https://www.americangeosciences.org/pubs/glossary. DAS03 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, 74 p, https://doi.org/10.3133/tm11B10. DAS04 Anderson, 1954 Anderson, A.L., 1954, A preliminary report on the fluorspar mineralization near Challis, Custer County, Idaho: Idaho Bureau of Mines and Geology Pamphlet 101, 12 p, https://www.idahogeology.org/product/p-101. DAS05 Armstrong, 1975 Armstrong, R.L., 1975, The geochronometry of Idaho: Isochron/West, no. 14, p. 1-50, https://geoinfo.nmt.edu/publications/periodicals/isochronwest/14/iw_v14_p01.pdf. DAS06 Dover, 1980 Dover, J.H., 1980, Status of the Antler orogeny in central Idaho-Clarifications and constraints from the Pioneer Mountains, in Fouch, T.D., and Magathan, E.R., eds., Paleozoic paleogeography of the west-central United States: Society of Economic Paleontologists and Mineralogists, Rocky Mountains Section, West-central United States Paleogeography Symposium 1, 1980, p. 371-386, https://archives.datapages.com/data/rocky_sepm/data/002/002001/371_rocky_mount20371.htm. DAS07 Dover and others, 1980 Dover, J.H., Berry, W.B.N., and Ross, R.J., Jr., 1980, Ordovician and Silurian Phi Kappa and Trail Creek Formations, Pioneer Mountains, Central Idaho­ Stratigraphic and structural revisions, and new data on graptolite faunas: U.S. Geological Survey Professional Paper 1090, 54 p, https://doi.org/10.3133/pp1090. DAS08 Hall, 1985 Hall, W.E., 1985, Stratigraphy of and mineral deposits in Middle and Upper Paleozoic rocks of the black-shale mineral belt, central Idaho, in chap. A of McIntyre, D.H. (ed.), Symposium on the geology and mineral deposits of the Challis 1 degree x 2 degree quadrangle, Idaho: U.S. Geological Survey Bulletin 1658-A-S, p. 117-131, https://pubs.usgs.gov/publication/b1658AS. DAS09 Hobbs and others, 1968 Hobbs, S.W., Hays, W.H., and Ross, R.J., Jr., 1968, The Kinnikinic Quartz­ite of central Idaho-Redefinition and subdivision: U.S. Geological Survey Bulletin 1254-J, p. Jl -J22, https://doi.org/10.3133/b1254J. DAS10 Mapel and others, 1965 Mapel, W.J., Read, W.H., and Smith, R.K., 1965, Geologic map and sections of the Doublespring quadrangle, Custer and Lemhi Counties, Idaho: U.S. Geological Survey Geologic Quadrangle Map GQ-464, scale 1:62,500, https://doi.org/10.3133/gq464. DAS11 Marvin and Dobson, 1979 Marvin, R.F., and Dobson, S.W., 1979, Radiometric ages-Compilation B, U.S. Geological Survey: Isochron/West, no. 26, p. 3-32. DAS12 McIntyre and others, 1982 McIntyre, D.H., Ekren, E.B., and Hardyman, R.F., 1982, Stratigraphic and structural framework of the Challis Volcanics in the eastern half of the Challis 1 degree x 2 degree quadrangle, Idaho, in chap. 1 of Bonnichsen, Bill, and Breckenridge, R.M., (eds.), Cenozoic geology of Idaho: Idaho Bureau of Mines and Geology Bulletin 26, p. 3-22, https://www.idahogeology.org/product/B-26. DAS13 McIntyre and Hobbs, 1987 McIntyre, D.H., and Hobbs, S.W., 1987, Geologic map of the Challis quadrangle, Custer County, Idaho: U.S. Geological Survey Quadrangle Map GQ-1599, scale 1:62,500, https://doi.org/10.3133/gq1599. DAS14 McIntyre and others, 1976 McIntyre, D.H., Hobbs, S.W., Marvin, R.F., and Mehnert, H.H., 1976, Late Cretaceous and Eocene ages for hydrothermal alteration and mineralization, Bayhorse district and vicinity, Custer County, Idaho: Isochron/West, no. 16, p. 11-12, https://geoinfo.nmt.edu/publications/periodicals/isochronwest/home.cfml?Issue=16. DAS15 Oaks and James, 1980 Oaks, R.Q., Jr., and James, W.C., 1980, The Kinnikinic Quartzite (Middle Ordovician) in the type area, central Idaho, and a new reference section near Arco, Idaho: Brigham Young University Geology Studies, v. 27, pt. 2, p. 1-9, https://ngmdb.usgs.gov/Prodesc/proddesc_88808.htm. DAS16 Ross, 1934 Ross, C.P., 1934, Geology and ore deposits of the Casto quadrangle, Idaho: U.S. Geological Survey Bulletin 854, 135 p, https://doi.org/10.3133/b854. DAS17 Ross, 1937 Ross, C.P., 1937, Geology and ore deposits of the Bayhorse region, Custer County, Idaho: U.S. Geological Survey Bulletin 877, 161 p, https://doi.org/10.3133/b877. DAS18 Ross, 1947 Ross, C.P., 1947, Geology of the Borah Peak quadrangle, Idaho: Geological Society of America Bulletin, v. 58, no. 12, p. 1085-1160, https://doi.org/10.1130/0016-7606(1947)58[1085:GOTBPQ]2.0.CO;2. DAS19 Ross, 1962 Ross, C.P., 1962, Stratified rocks in south-central Idaho: Idaho Bureau of Mines and Geology Pamphlet 125, 126 p, https://ngmdb.usgs.gov/Prodesc/proddesc_100169.htm. DAS20 Ruppel, 1980 Ruppel, E.T., 1980, Geologic map of the Patterson quadrangle, Lemhi County, Idaho: U.S. Geological Survey Geologic Quadrangle Map GQ-1529, scale 1:62,500, https://doi.org/10.3133/gq1529. DAS21 Sandberg, 1975 Sandberg, C.A., 1975, McGowan Creek Formation, new name for Lower Mississippian flysch sequence in east-central Idaho: U.S. Geological Survey Bulletin 1405-E, 11 p, https://doi.org/10.3133/b1405E. DataSourceID [DatSrcID] (CartographicLines, ContactsAndFaults, GeologicLines, MapUnitPolys, OverlayPolys) Source of data; alpha-numeric value used to link to DataSources table (foreign key). USGS NCGMP, 2020 DAS01 Hobbs and others, 1991 See DataSources_ID attribute information. Definition (GeoMaterialDict, Glossary) Plain-language definition. USGS NCGMP, 2020 Example of values: "The outline of a body of water (lake) and/or stream." DefinitionSourceID [DefSrcID] (Glossary) Source of definition; alpha-numeric value used to link to DataSources table (foreign key). USGS NCGMP, 2020 DAS01 Hobbs and others, 1991 See DataSources_ID attribute information. DAS02 Neuendorf and others, 2011 See DataSources_ID attribute information. DAS03 USGS NCGMP, 2020 See DataSources_ID attribute information. Description [Descr] (ContactsAndFaults, DescriptionOfMapUnits, GeologicLines) 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 Examples of values: "Intermediate lavas, breccias, and landslide" or "contact, approximate" 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: "DMU001" 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 "DAS01 | DAS05 | DAS12"; see DataSources_ID attribute information. ExistenceConfidence [ExiConf] (ContactsAndFaults, GeologicLines) 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. 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 Examples of values: "Mudflow deposits" or "Rhyodacite of Spring Basin" GeologicLines_ID [GeoLin_ID] (GeologicLines) Unique alpha-numeric value assigned to each feature (primary key). USGS NCGMP, 2020 Values are unique within this database. Example of values: "GEL001" 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 Examples of values: "----Lava Flows" or "--Extrusive Igneous Material" 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 Low The overall lithology of this map unit is not adequately classifiable using this list of terms and definitions, but the term selected is the best available. Or this map unit is insufficiently known to confidently assign a GeoMaterial 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 value: "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 is the same length to allow text-based sorting of table entries. USGS NCGMP, 2020 Examples of values: "01" or "05-25-01" IdentityConfidence [IdeConf] (ContactsAndFaults, GeologicLines, MapUnitPolys, OrientationPoints, OverlayPolys) 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. Values of -9 indicate value unknown. Values of -99 indicate no dip measured. USGS NCGMP, 2020 -99 90 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: "----Clastic sediment" or "----Fine-grained intrusive igneous rock" IsConcealed [IsCon] (ContactsAndFaults, GeologicLines) Flag for contacts and faults covered by overlying map unit. USGS NCGMP, 2020 Y Yes USGS NCGMP, 2020 N No USGS NCGMP, 2020 Label (CartographicLines, ContactsAndFaults, DescriptionOfMapUnits, GeologicLines, MapUnitPolys, OrientationPoints, OverlayPolys) 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: "Trmq" or "_cb" LocationConfidenceMeters [LocConfM] (ContactsAndFaults, GeologicLines, OrientationPoints) Estimated half-width in meters of positional uncertainty envelope; position is relative to other features in database. USGS NCGMP, 2020 Positive real number. Value of -9 indicates value is unknown. LocationSourceID [LocSrcID] (OrientationPoints) Source of location; alpha-numeric value used to link to DataSources table (foreign key). USGS NCGMP, 2020 DAS01 Hobbs and others, 1991 DataSources table MapUnit (DescriptionOfMapUnits, MapUnitPolys, OrientationPoints) Short plain-text identifier of the map unit. Foreign key to DescriptionOfMapUnits table. USGS NCGMP, 2020 CAbc Quartzite of Boundary Creek area Hobbs and others, 1991 CAc Cash Creek Quartzite Hobbs and others, 1991 CAcb Lower carbonate Hobbs and others, 1991 CAd Dolomite of Bayhorse Creek Hobbs and others, 1991 CAg Garden Creek Phyllite Hobbs and others, 1991 CAs Shale Hobbs and others, 1991 Dab Unit A and Beartooth Butte Formation Hobbs and others, 1991 Db Unit B Hobbs and others, 1991 Dg Grand View Dolomite Hobbs and others, 1991 Dgj Grand View Dolomite and Jefferson Dolomite, undivided Hobbs and others, 1991 Dj Jefferson Dolomite Hobbs and others, 1991 Dtf Three Forks Formation Hobbs and others, 1991 Jg Gabbro Hobbs and others, 1991 Kgd Granodiorite and quartz monzonite Hobbs and others, 1991 MCAsr Salmon River assemblage Hobbs and others, 1991 Mmc Middle Canyon Formation Hobbs and others, 1991 Mmg McGowan Creek Formation Hobbs and others, 1991 Msp Scott Peak Formation Hobbs and others, 1991 Oc Clayton Mine Quartzite Hobbs and others, 1991 OCAb Bayhorse Dolomite Hobbs and others, 1991 OCAq Quartzite-siltite lithologies of upper Cash Creek Hobbs and others, 1991 OCArr Siltstone, sandy siltstone, and quartzite of Rob Roy mine area Hobbs and others, 1991 Occ Upper carbonate Hobbs and others, 1991 Och Clayton Mine(?) Quartzite of Happy Hollow Hobbs and others, 1991 Ocq Pure quartzite Hobbs and others, 1991 Oe Ella Dolomite Hobbs and others, 1991 Ok Kinnikinic Quartzite Hobbs and others, 1991 Op Phi Kappa(?) Formation Hobbs and others, 1991 Or Ramshorn Slate Hobbs and others, 1991 Orc Conglomerate Hobbs and others, 1991 Osm Saturday Mountain Formation Hobbs and others, 1991 Osp Interbedded siltstone, quartzite, and dolomite of upper Sawmill Creek and Poverty Flat Hobbs and others, 1991 Osq Interbedded siltstone and quartzite Hobbs and others, 1991 OZI Interbedded quartzite, dolomite, and argillite of Leaton Gulch and Pennal Gulch areas Hobbs and others, 1991 Qal Alluvium Hobbs and others, 1991 Qc Colluvium Hobbs and others, 1991 Qd Diamicton Hobbs and others, 1991 Qfo Old alluvial-fan deposits Hobbs and others, 1991 Qfy Young alluvial-fan deposits Hobbs and others, 1991 Qgo Older gravels Hobbs and others, 1991 Ql Landslide deposits Hobbs and others, 1991 Qla Avalanche deposits Hobbs and others, 1991 Qm Mudflow deposits Hobbs and others, 1991 Qs Slump block of Clayton Mine Quartzite (Unit Oc) Hobbs and others, 1991 Qso Solifluction deposits Hobbs and others, 1991 Qsu Surficial deposits, undivided Hobbs and others, 1991 Qtr Travertine Hobbs and others, 1991 Sl Laketown Dolomite Hobbs and others, 1991 Srm Roberts Mountains Formation Hobbs and others, 1991 Taf Ash-flow tuff Hobbs and others, 1991 Tasf Andesite sills or flows(?) Hobbs and others, 1991 Tat Potassium-rich andesite of upper Trealor Creek Hobbs and others, 1991 Tb Potassium-rich olivine basalt and andesite Hobbs and others, 1991 Tbi Mafic intrusive complex Hobbs and others, 1991 Tbj Olivine basalt of ridge southwest of Juliette Basin Hobbs and others, 1991 Tcg Alluvial conglomerate Hobbs and others, 1991 Tcr Tuff of Challis Creek Hobbs and others, 1991 Tdb Irregular domelike masses of rhyodacite Hobbs and others, 1991 Tdbi Cross-cutting plugs of rhyodacite Hobbs and others, 1991 Tfg Fanglomerate (pre-Challis Volcanics) Hobbs and others, 1991 TI Intermediate and mafic lavas Hobbs and others, 1991 Tia Altered dikelike mass on ridge north of Cinnabar Creek Hobbs and others, 1991 Tib Mafic intrusive rock Hobbs and others, 1991 Tibr Intrusive breccia north of Buster Lake Hobbs and others, 1991 Tid Rhyodacite(?) breccia plug Hobbs and others, 1991 Tip Pyroxene phenocryst intrusions Hobbs and others, 1991 Tir Rhyolite Hobbs and others, 1991 Tit Plugs on upper Trealor Creek Hobbs and others, 1991 Tla Latite flows east of Spar Canyon Hobbs and others, 1991 Tlm Mudflow conglomerate, volcanic sandstone, and aphanitic lava Hobbs and others, 1991 Tlp Lava and breccia of Potaman Peak Hobbs and others, 1991 Tm Mudflow breccia and conglomerate near Daugherty Gulch Hobbs and others, 1991 Tmf Mudflows Hobbs and others, 1991 Tmr Mudflow breccia, conglomerate, and lava of Rough Creek Hobbs and others, 1991 Tp Tuff of Pennal Gulch Hobbs and others, 1991 Trbc Dacite lava of Bayhorse Creek Hobbs and others, 1991 Trbr Rhyodacitic lava and breccia of small lava dome(?) east of Tollgate Ruins Hobbs and others, 1991 Trc Rhyodacite of Cash Creek Hobbs and others, 1991 Trd Rhyodacite lavas and breccias of Round Valley Hobbs and others, 1991 Trf Rhyodacite breccia and lava of Fannys Hole Hobbs and others, 1991 Tri Plug between Coal and Cabin Creeks Hobbs and others, 1991 Trl Lower rhyodacite flows Hobbs and others, 1991 Trm Rhyolite flows at Mill Creek Summit Hobbs and others, 1991 Trmb Vitrophyre breccia Hobbs and others, 1991 Trmq Flow containing conspicuous quartz phenocrysts Hobbs and others, 1991 Trp Pyroclastic rocks Hobbs and others, 1991 Trr Tuff of Red Ridge Hobbs and others, 1991 Trs Rhyodacite of upper Second Creek Hobbs and others, 1991 Trsb Rhyodacite of Spring Basin Hobbs and others, 1991 Ts Syenite intrusion Hobbs and others, 1991 Tsd Dark syenite Hobbs and others, 1991 Tt Mudflow breccia, silicic tuff, and sedimentary rock sequence Hobbs and others, 1991 Tvs Volcanic sedimentary rocks Hobbs and others, 1991 unmapped area unmapped area Hobbs and others, 1991 water water Hobbs and others, 1991 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: "MUP0001" 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 Example of values: "Mesozoic Intrusive Rocks" Notes (CartographicLines, ContactsAndFaults, DataSources, GeologicLines, MapUnitPolys, OrientationPoints, OverlayPolys) Additional information specific to a particular feature or table entry. USGS NCGMP, 2020 Free text. Example of values: "unmapped intermediate lavas, breccias, and landslide" 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: "ORP0001" OrientationSourceID [OriSrcID] (OrientationPoints) Source of orientation data; alpha-numeric value used to link to DataSources table (foreign key). USGS NCGMP, 2020 DAS01 Hobbs and others, 1991 Hobbs, S.W., Hays, W.H., and McIntyre, D.H., 1991, Geologic map of the Bayhorse area, central Custer County, Idaho: U.S. Geological Survey, Miscellaneous Investigations Series Map I-1882, scale 1:62,500, https://pubs.usgs.gov/publication/i1882. 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 an observation are plotted. Value is scale of the map. USGS NCGMP, 2020 Positive real number. Using original map scale of 62500. Shape (CartographicLines, ContactsAndFaults, GeologicLines, MapUnitPolys, OrientationPoints, OverlayPolys) 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 (MapUnitPolys, OverlayPolys) An Esri default field that contains the area of a polygon. The value is automatically generated in units of the feature class. Esri 689.641614 134518110.297557 square meters 0.000001 Shape_Length [Shp_Len] (CartographicLines, ContactsAndFaults, GeologicLines, MapUnitPolys, OverlayPolys) 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 21.6936 252489.2093 meters 0.000001 Source (DataSources) Plain-text short description that identifies the data source. USGS NCGMP, 2020 Example of values: "Hobbs and others, 1991" 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 NULL. Symbol (CartographicLines, ContactsAndFaults, DescriptionOfMapUnits, GeologicLines, MapUnitPolys, OrientationPoints, OverlayPolys) 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 Numbers correspond to FGDC symbolization or a MapUnit. These values also correspond to the supplied Style file. Example of values: "01.01.01" Term (Glossary) Plain-language word for a concept. Values are unique within database as a whole. USGS NCGMP, 2020 Values correspond to attributes primarily used in the Type fields. Examples of values: "anticline" or "bedding, horizontal" Type (CartographicLines, ContactsAndFaults, GeologicLines, OrientationPoints, OverlayPolys) 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, fault, or water boundary. USGS NCGMP, 2020 anticline A fold, generally convex upward, whose core contains the stratigraphically older rocks. Neuendorf and others, 2011 anticline, overturned A fold, generally convex upward, whose core contains the stratigraphically older rocks that has tilted beyond the perpendicular. Neuendorf and others, 2011 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 bedding, crumpled Bedding that has crumpled appearance and/or structure. Hobbs and others, 1991 bedding, horizontal Bedding that is horizontal to the principal surface of deposition and thus has a dip of zero. Neuendorf and others, 2011 bedding, overturned Bedding inclined to the principal surface of deposition that has tilted beyond the perpendicular. Sequence of strata thus appears reversed. Neuendorf and others, 2011 bedding, vertical Bedding inclined to the principal surface of deposition that has tilted vertical (90 degrees). Neuendorf and others, 2011 contact A plane or irregular surface between two types or ages of rock. Neuendorf and others, 2011 contact, internal Contacts within map unit outline different slides or flow masses. Also represents contacts between questionable map units. Hobbs and others, 1991 contact, magnetic polarity reversal Contact of magnetic polarity reversal (A natural remanent magnetization opposite to the present ambient geomagnetic-field direction.) Tics on the normal magnetic polarity side. The opposite side is reversed magnetic polarity. Neuendorf and others, 2011 cross section Location of a diagram or drawing that shows features transected by a given plane. Neuendorf and others, 2011 dike A tabular igneous intrusion that cuts across the bedding or foliation of the country rock. Neuendorf and others, 2011 dike, mafic A tabular igneous intrusion that cuts across the bedding or foliation of the country rock composed primarily of mafic intrusive rock. Hobbs and others, 1991 fault A discrete surface or zone of discrete surfaces separating two rock masses across which one mass has slid past the other. Relative motion unknown. 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 fault, oblique-slip, left-lateral A fault on which the net slip has dip slip and strike slip components and the side opposite the observer has been displaced to the left. Neuendorf and others, 2011 fault, oblique-slip, right-lateral A fault on which the net slip has dip slip and strike slip components and the side opposite the observer has been displaced to the right. Neuendorf and others, 2011 fault, strike-slip, right-lateral A fault on which the movement is parallel to the fault's strike and which the side opposite the observer has been displaced to the right. Neuendorf and others, 2011 fault, thrust A fault with a dip of 45 degrees or less over much of its extent, on which the hanging wall has moved upward relative to the footwall. Neuendorf and others, 2011 hydrothermal alteration Alteration of rocks or minerals by the reaction of hydrothermal water with pre-existing solid phases. Open-system chemical reactions resulting from partial to complete chemical equilibrium between the host rock and hydrothermal fluids of a mineral deposit. Neuendorf and others, 2011 map boundary A line representing the boundary of the mapping area. Neuendorf and others, 2011 scratch boundary Used where contacts were omitted and not mapped. Hobbs and others, 1991 syncline A fold of which the core contains the stratigraphically younger rocks; it is generally concave upward. Neuendorf and others, 2011 syncline, overturned A syncline that has been tilted beyond the perpendicular. Sequence of strata thus appears reversed. Neuendorf and others, 2011 syncline, plunging A syncline in which the hinge line is inclined to the horizontal. Neuendorf and others, 2011 water The outline of a body of water (lake) and/or stream. Hobbs and others, 1991 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://ngmdb.usgs.gov/Prodesc/proddesc_9967.htm" 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 layers. 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 Set Use a file extraction software such as WinZip, 7zip, Peazip https://doi.org/10.5066/P90ANEBC None. No fees are applicable for obtaining the data set. 20240726 Sara C Gonzalez U.S. Geological Survey, ROCKY MOUNTAIN REGION Physical Scientist mailing address

Mail Stop 973, W 6th Ave Kipling St

Lakewood CO 80225 US 303-236-1222 scgonzalez@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998