Identification_Information: Citation: Citation_Information: Originator: Reifenstuhl, R.R. Originator: Dover, J.H. Originator: Pinney, D.S. Originator: Newberry, R.J. Originator: Clautice, K.H. Originator: Liss, S.A. Originator: Blodgett, R.B. Originator: Bundtzen, T.K. Originator: Weber, F.R. Publication_Date: 1997 Title: Geologic map of the Tanana B-1 quadrangle, central Alaska Geospatial_Data_Presentation_Form: map, vector digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 97-15A Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Other_Citation_Details: 17 p., 1 sheet, scale 1:63,360 Online_Linkage: http://dx.doi.org/10.14509/2551 Description: Abstract: This report provides detailed (1:63,360-scale) mapping of the Tanana B-1 Quadrangle (250 square miles; equivalent to four 7.5 minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the north of the Tanana A-1 and A-2 Quadrangles. This report includes detailed geologic, structural, stratigraphic, and geochronologic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the project has also generated derivative maps of geologic construction materials and geologic hazards. Purpose: The Tanana B-1 quadrangle lies between the villages of Rampart, on the Yukon River, and Manley Hot Springs, at the terminus of the Elliot Highway. At the time this project was published the area towns were not part of any municipal or local governmental jurisdiction. The investigation of gold, tin, and other mineral occurrences in conjunction with comprehensive geologic mapping and recently acquired geophysical data will pro­vide a scientific basis for continued mineral exploitation that will economically benefit the region's inhabitants and the State of Alaska. This publication also identifies sources of construction materials and evaluates the type and severity of geologic constraints to future development in the region. Supplemental_Information: The layers listed below are present as ArcGIS shape files. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribute_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Basic unit information is also included in the geologic unit code set file "RI1997-15_codeset.pdf". Layers include: >bedcode_arc comprehensive geologic bedrock units >faultcode_arc comprehensive structural lines >foldcode_arc comprehensive structural fold lines, anticlines, or synclines >tanb1comp3_polygon comprehensive geologic units Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1996 Ending_Date: 1997 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -150.52404955 East_Bounding_Coordinate: -149.97139557 North_Bounding_Coordinate: 65.50914386 South_Bounding_Coordinate: 65.24096052 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: Aerial Photography Theme_Keyword: Aeromagnetic Survey Theme_Keyword: Age Dates Theme_Keyword: Amphibolite Theme_Keyword: Ar-Ar Theme_Keyword: Bibliography Theme_Keyword: C14 Theme_Keyword: Carbonates Theme_Keyword: CIPW Norms Theme_Keyword: Clastics Theme_Keyword: Coal Theme_Keyword: Conductivity Survey Theme_Keyword: Conodonts Theme_Keyword: Electromagnetic Survey Theme_Keyword: Faulting Theme_Keyword: Faults Theme_Keyword: Folding Theme_Keyword: Fossils Theme_Keyword: Geologic Theme_Keyword: Geomorphology Theme_Keyword: Geothermometry Theme_Keyword: Glacial Theme_Keyword: Glacial Processes Theme_Keyword: Greenschist Theme_Keyword: Igneous Rocks Theme_Keyword: Index Minerals Theme_Keyword: Isograds Theme_Keyword: Isotopes Theme_Keyword: K-Ar Theme_Keyword: Lode Theme_Keyword: Major Oxides Theme_Keyword: Metamorphic Grade Theme_Keyword: Metamorphic Minerals Theme_Keyword: Metamorphism Theme_Keyword: Modal Analysis Theme_Keyword: Petrography Theme_Keyword: Plutonic Theme_Keyword: Plutonic Hosted Theme_Keyword: Precious Metals Theme_Keyword: Reconstructions Theme_Keyword: Regional Theme_Keyword: Regional Metamorphism Theme_Keyword: Resource Assessment Theme_Keyword: Rifting Theme_Keyword: Sample Location Theme_Keyword: Sandstone Theme_Keyword: Schist Theme_Keyword: Sedimentary Theme_Keyword: Shale Theme_Keyword: Structure Theme_Keyword: Surficial Theme_Keyword: Tectonics Theme_Keyword: Terranes Theme_Keyword: Type Section Theme_Keyword: Uplift Theme_Keyword: Volcanic Place: Place_Keyword_Thesaurus: none Place_Keyword: Yukon River Stratum: Stratum_Keyword_Thesaurus: none Stratum_Keyword: Amy Creek Assemblage Stratum_Keyword: Amy Dolomite Stratum_Keyword: Kaltag Fault Stratum_Keyword: Livengood Dome Chert Stratum_Keyword: Rampart Group Stratum_Keyword: Ruby Terrane Stratum_Keyword: Wickersham Unit Stratum_Keyword: Wilber Creek Ash Stratum_Keyword: Wolverine Complex Stratum_Keyword: Yukon-Tanana Terrane Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: Cambrian Temporal_Keyword: Carboniferous Temporal_Keyword: Cenozoic Temporal_Keyword: Cretaceous Temporal_Keyword: Devonian Temporal_Keyword: Early Proterozoic Temporal_Keyword: Eocene Temporal_Keyword: Holocene Temporal_Keyword: Jurassic Temporal_Keyword: Mesozoic Temporal_Keyword: Ordovician Temporal_Keyword: Paleocene Temporal_Keyword: Paleozoic Temporal_Keyword: Permian Temporal_Keyword: Pleistocene Temporal_Keyword: Proterozoic Temporal_Keyword: Quaternary Temporal_Keyword: Silurian Temporal_Keyword: Tertiary Temporal_Keyword: Triassic Access_Constraints: This report, map, and/or dataset are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Use_Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. User specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: GIS Data Manager/Cartographer Contact_Address: Address_Type: mailing and physical address Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907) 451-5029 Contact_Voice_Telephone: (907) 451-5020 Contact_Facsimile_Telephone: (907) 451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Contact_Instructions: You may view our web site at http://www.dggs.alaska.gov for the latest information on available data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change. Data_Set_Credit: Funding for the geologic mapping and geochronologic dating performed for this project was provided by the U.S. Geological Survey STATEMAP Program under award number 1474-HQ-96-AG (June 1996 through May 1997) and by the Alaska State Legislature. Native_Data_Set_Environment: Microsoft Windows XP SP2, ArcGIS 9.+, and any text editor. Cross_Reference: Citation_Information: Originator: Reifenstuhl, R.R. Originator: Dover, J.H. Originator: Pinney, D.S. Originator: Newberry, R.J. Originator: Clautice, K.H. Originator: Liss, S.A. Originator: Blodgett, R.B. Originator: Bundtzen, T.K. Originator: Weber, F.R. Publication_Date: 1997 Title: Interpretive geologic bedrock map of the Tanana B-1 Quadrangle, Central Alaska Geospatial_Data_Presentation_Form: map and vector digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 97-15B Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS) Other_Citation_Details: 15 p., 1 sheet, scale 1:63,360 Online_Linkage: http://dx.doi.org/10.14509/2552 Cross_Reference_Relevance: Text report available Cross_Reference: Citation_Information: Originator: Pinney, D.S. Publication_Date: 1997 Title: Surficial geologic map of the Tanana B-1 Quadrangle, central Alaska Geospatial_Data_Presentation_Form: map and vector digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 97-15C Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Other_Citation_Details: 5 p., 1 sheet, scale 1:63,360 Online_Linkage: http://dx.doi.org/10.14509/2553 Cross_Reference_Relevance: Text report available Cross_Reference: Citation_Information: Originator: Pinney, D.S. Publication_Date: 1997 Title: Derivative geologic materials map of the Tanana B-1 Quadrangle, central Alaska Geospatial_Data_Presentation_Form: map and vector digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 97-15D Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: http://dx.doi.org/10.14509/2554 Cross_Reference: Citation_Information: Originator: Pinney, D.S. Publication_Date: 1997 Title: Derivative map of potential geologic hazards in the Tanana B-1 Quadrangle, Alaska Geospatial_Data_Presentation_Form: map and vector digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 97-15E Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: http://dx.doi.org/10.14509/2555 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Locations for geologic and comprehensive point data were entered manually from GPS units into a spreadsheet. Surficial and materials point, line, and polygon data were determined in the field using 1:63,360-scale topographic maps and 1:50,000 (nominal) scale, color-infrared aerial photographs. Geologic data included in the compilation are the field maps and notes from this project as well as data from other sources as noted in the "Sources Cited" section. Attributes were verified for consistency and completeness during the creation of the metadata. Logical_Consistency_Report: Polygon topology present and clean on appropriate data. Other data are line, point, or annotation data and do not require topologic relationships. Completeness_Report: This dataset includes geospatial information about geologic units and their ages; field sample locations; structural features; and structural measurements. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: DGGS location data and estimated position errors were manually entered into a spreadsheet. Sample numbers and locations with selected data were spatially registered and analyzed in ArcGIS software. Location data for the surficial and materials maps were determined visually using topographic maps at a scale of 1:63,360 and 1:50,000 (nominal) scale, color-infrared aerial photographs. See "Source_Information" section for horizontal positional accuracy of locations not measured by DGGS. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 100 Horizontal_Positional_Accuracy_Explanation: A value of estimated position error in meters was calculated by the GPS units and recorded for each sample location. This error results from items such as error in satellite positions, mathematical error introduced by the formulas used by the GPS unit for calculating position, and errors caused by narrow satellite alignments. Estimated position error is a value determined by the GPS manufacturer for the calculation and geometric error as a whole. "Selective availability," a deliberate degradation of GPS data managed by the U.S. government that induces an additional error of approximately 100 meters to a GPS location, was in effect until May 1, 2000, and thus during the time of this field work. Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 110 Horizontal_Positional_Accuracy_Explanation: A value of estimated position error in meters. Surficial and bedrock map data have a horizontal positional accuracy dependent on: 1) the 1:50,000-scale (nominal) aerial photographs on which it is based, with an estimated potential error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; 2) the accuracy of the human zoom transfer scope operator in tracing the line work from acetate overlays to topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; 3) the accuracy of the zoom transfer process itself, error magnitude highly variable and unknown but potentially large; 4) the digitizing RMS error of 0.003 inches (input coverage units), which equates to approximately 5 meters on the ground for a 1:63,360-scale map; and 5) the accuracy of the human operator digitizing the geologic line work from the topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground. Total potential horizontal error for surficial-geologic map features is therefore estimated to be approximately 110 meters. The bedrock and comprehensive field maps were digitized using a map tablet and cross-hair mouse. Map error is induced by: (1) transferring map data from base topography to a mylar compilation map, with an estimated potential error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; (2) the digitizing RMS error [24 control points on a regular grid have an average RMS error of 10.8 meters on the ground; individual control point error ranges from 4.3 to 21.2 meters on the ground]; and (3) the accuracy of the human operator digitizing the geologic line work from the topographic base map, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground. Total potential horizontal error for bedrock and comprehensive geologic map features is estimated to be approximately 110 meters. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Eakin, H.M. Publication_Date: 1912 Title: The Rampart and Hot Springs regions Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: Bulletin 520 Publication_Information: Publication_Place: Reston, VA, USA Publisher: U.S. Geological Survey Other_Citation_Details: p. 271-287 Online_Linkage: http://www.dggs.alaska.gov/pubs/id/4819 Larger_Work_Citation: Citation_Information: Originator: U.S. Geological Survey Staff Publication_Date: 1912 Title: Mineral resources of Alaska, report on progress of investigations of 1911 Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: Bulletin 520 Publication_Information: Publication_Place: Reston, VA, USA Publisher: U.S. Geological Survey Other_Citation_Details: 352 p., 1 sheet, scale 1:2,500,000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1912 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Eakin, 1912 Source_Contribution: This map contains geologic unit descriptions and outcrop locations and was used to plan traverses and help define geologic units. Source_Information: Source_Citation: Citation_Information: Originator: Eakin, H.M. Publication_Date: 1913 Title: A geologic reconnaissance of a part of the Rampart Quadrangle, Alaska Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: Bulletin 535 Publication_Information: Publication_Place: Reston, VA, USA Publisher: U.S. Geological Survey Other_Citation_Details: 38 p., 2 sheets, scale 1:250,000 Online_Linkage: http://www.dggs.alaska.gov/pubs/id/3412 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1913 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Eakin, 1913 Source_Contribution: This map contains geologic unit descriptions and outcrop locations and was used to plan traverses and help define geologic units. Source_Information: Source_Citation: Citation_Information: Originator: Hopkins, D.M. Originator: Taber, B. Publication_Date: 1962 Title: Asymmetrical valleys in central Alaska (abs.) Series_Information: Series_Name: Special Paper Issue_Identification: v. 68 Publication_Information: Publication_Place: Boulder, CO, USA Publisher: Geological Society of America Other_Citation_Details: p. 116 Online_Linkage: NONE Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1962 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hopkins and Taber, 1962 Source_Contribution: This map contains geologic unit descriptions and outcrop locations and was used to plan traverses and help define geologic units. Source_Information: Source_Citation: Citation_Information: Originator: Newberry, R.J. Originator: Clautice, K.H. Publication_Date: 1997 Title: Compositions of placer gold in the Rampart-Eureka-Manley-Tofty area, eastern Tanana and western Livengood quadrangles, central Interior Alaska, determined by electron microprobe analysis Series_Information: Series_Name: Public Data File Issue_Identification: PDF 97-49 Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS) Other_Citation_Details: 49 p. Online_Linkage: http://dx.doi.org/10.14509/1813 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1997 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Newberry and Clautice, 1997 Source_Contribution: This report contains information that was used to aid in the creation of and sample preparation for the surficial geologic map (RI 97-15C). Source_Information: Source_Citation: Citation_Information: Originator: Wagner, A.A. Publication_Date: 1957 Title: The use of the Unified Soil Classification System by the Bureau of Reclamation Series_Information: Series_Name: Proceedings Issue_Identification: v. I Publication_Information: Publication_Place: London, England Publisher: 4th International Conference on Soil Mechanics and Foundation Engineering Other_Citation_Details: 125 p. Online_Linkage: NONE Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1957 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Wagner, 1957 Source_Contribution: This report contains information that was used to aid in the creation of and sample preparation for the surficial and geologic materials map (RI 97-15C and RI 97-15D). Source_Information: Source_Citation: Citation_Information: Originator: Yeend, W. Publication_Date: 1990 Title: Gold placers, geomorphology, and paleo-drainage of Eureka Creek and Tofty areas, Alaska Series_Information: Series_Name: U.S. Geological Survey Bulletin Issue_Identification: Bulletin 1946 Publication_Information: Publication_Place: Reston, VA, USA Publisher: U.S. Geological Survey Other_Citation_Details: p. 107-109 Online_Linkage: http://www.dggs.alaska.gov/pubs/id/4503 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1990 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Yeend, 1990 Source_Contribution: This report contains information that was used to aid in the creation of and sample preparation for the surficial geologic map (RI 97-15C). Process_Step: Process_Description: Field work - Field work for bedrock investigations, including ridge traverses and examination of riverbank exposures, was conducted between April 30 and July 4, 1996. Field notes and rock samples were collected at approximately 700 stations throughout the Tanana A-1 and A-2 Quadrangles. Bedrock mappers recorded observations on 1:50,000- and 1:63,360-scale topographic base maps, compiled onto a 1:50,000-mylar map after the field season ended. Field stations were located using hand-held GPS units. Field station notes and GPS location data were manually entered into a spreadsheet. Process_Date: 1996 Process_Step: Process_Description: Fieldwork - Fieldwork for surficial geologic investigations, including ridge and valley traverses, road-cut investigations, and river exposures, was conducted for approximately 21 person-days in June and July 1997 by a surficial geologist. Field notes and sediment samples were collected throughout the area for surficial investigations. Surficial mapping involved using sources cited below on a regular basis for checking and correlating general units. The surficial mapper recorded observations on co-registered acetate overlays on 1:50,000-scale (nominal) color-infrared aerial photographs, and directly on 1:63,360-scale topographic base maps. Stations were located using air photos and topographic maps. Source_Used_Citation_Abbreviation: Eakin, 1912 Source_Used_Citation_Abbreviation: Eakin, 1913 Source_Used_Citation_Abbreviation: Hopkins and Taber, 1962 Source_Used_Citation_Abbreviation: Newberry and Clautice, 1997 Source_Used_Citation_Abbreviation: Yeend, 1990 Process_Date: 1996 Process_Step: Process_Description: Laboratory data - See accompanying reports RI 97-15A and RI 97-15B for more information. Process_Date: 1996 Process_Step: Process_Description: Photo interpretation - Before, during, and after field work, surficial-geologic information was interpreted using 1:50,000-scale (nominal) color-infrared air-photo stereopairs, and compiled onto acetate overlays. Photo interpretation was based on field notes from fieldwork process step (above), observed land forms and relationships in the photos, and all known geologic data from previous work in the area. The main sources of existing data include Eakin (1912; 1913), Hopkins and Tabor (1962), and Yeend (1990). The overlay information was transferred to a paper 1:63,360-scale USGS topographic base using a zoom transfer scope. Source_Used_Citation_Abbreviation: Eakin, 1912 Source_Used_Citation_Abbreviation: Eakin, 1913 Source_Used_Citation_Abbreviation: Hopkins and Taber, 1962 Source_Used_Citation_Abbreviation: Newberry and Clautice, 1997 Source_Used_Citation_Abbreviation: Yeend, 1990 Process_Date: 1996 Process_Step: Process_Description: Digital Cartography - Surficial-geologic information was digitized from the paper USGS topographic base map into Arc/Info 7.0.4 GIS (ArcEdit module) using a large-format digitizing table. Surficial-geologic polygons and lines were then edited and attributed using Arc, Info, and ArcEdit. Bedrock point data of locations of structural observations (strike, dip, cleavage, jointing, etc.) were intersected with the surficial-geologic polygon coverage using the Arc command "intersect" in order to identify locations that were mapped as surficial materials based on aerial photography but were found to have small exposures that were desirable to be mapped as bedrock. These areas were then modified in the surficial-geologic coverages to be areas of bedrock exposure. Final bedrock and surficial geology polygon coverages were merged using the Arc command "union" to generate the polygon coverage used to make the comprehensive geologic map. Other cartographic elements, primarily text and tables, were created in CorelDraw, converted to CGM format, and imported into ArcPlot for final layout. Data from the comprehensive geologic map of the area were used as the basis for generating the derivative engineering-geologic map. An ArcInfo lookup table was made to assign geologic units (item UNIT) from the comprehensive map to appropriate engineering-geologic units (item MAT) based on the Unified Soil Classification System as described by Wagner (1957). This lookup table was applied to the ArcInfo polygon coverage containing the geologic units and a new engineering-geologic polygon coverage was generated using the "dissolve" command based on the new materials-unit item "MAT". Additional features were mapped from ground observations and interpretation of air photos, and digitized and attributed using ArcInfo. ArcPlot was used to generate plot files of the resulting materials coverage using DGGS-standard symbology. Source_Used_Citation_Abbreviation: Wagner, 1957 Process_Date: 1996 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 5 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -153.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Layer_Name: tanb1comp3_polygon Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000064 Ordinate_Resolution: 0.000064 Planar_Distance_Units: meters Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 5 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -153.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Layer_Name: bedcode_arc Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000064 Ordinate_Resolution: 0.000064 Planar_Distance_Units: meters Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 5 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -153.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Layer_Name: faultcode_arc Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000064 Ordinate_Resolution: 0.000064 Planar_Distance_Units: meters Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 5 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -153.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Layer_Name: foldcode_arc Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000032 Ordinate_Resolution: 0.000032 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6,378,206.4 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tanb1comp3_polygon Entity_Type_Label: tanb1comp3_polygon.shp Entity_Type_Definition: Object type is vector, there are 1834 rows associated with this entity, and the entity values refer to comprehensive geologic unit contacts Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: UNIT Attribute_Definition: Comprehensive geologic bedrock unit labels Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Codeset_Domain: Codeset_Name: RI1997-15_codeset.pdf Codeset_Source: Alaska Division of Geological & Geophysical Surveys http://www.dggs.alaska.gov/metadata/RI1997-15_codeset.pdf Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: FZONE Enumerated_Domain_Value_Definition: Victoria Creek Fault- Major dextral strike-slip fault zone connecting Tintina Fault Zone. Also called the Kaltag fault or the Tozitna fault. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: RIV Enumerated_Domain_Value_Definition: River- Yukon River Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ts? Enumerated_Domain_Value_Definition: Unit Ts, questionable Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: bedcode_arc Entity_Type_Label: bedcode_arc.shp Entity_Type_Definition: Object type is vector, there are 2664 rows associated with this entity, and the entity values refer to comprehensive bedrock unit contacts Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: SYMBOL Attribute_Definition: Line symbols for contacts, defined as boundaries between geologic formations or other rock units. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Hidden line, defines the polygon boundary, but is not displayed on the map for aesthetic purposes Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Neatline for small scale maps, in this case used for contact boundaries Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: SURFBED Attribute_Definition: Defines whether or not the polygon is categorized as a bedrock or surficial geologic unit Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: B Enumerated_Domain_Value_Definition: Categorized as a bedrock geologic unit Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: S Enumerated_Domain_Value_Definition: Categorized as a surficial geologic unit Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Numerical assignment of cartographic lines Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: Contact Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 5 Enumerated_Domain_Value_Definition: Contact, concealed Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 20 Enumerated_Domain_Value_Definition: Hidden line, defines the polygon boundary, but is not displayed on the map for aesthetic purposes Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: faultcode_arc Entity_Type_Label: faultcode_arc.shp Entity_Type_Definition: Object type is vector, there are 1784 rows associated with this entity, and the entity values refer to types of comprehensive structural lines Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: SYMBOL Attribute_Definition: Line symbols for types of faults Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Hidden line, defines the polygon boundary, but is not displayed on the map for aesthetic purposes Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 5 Enumerated_Domain_Value_Definition: Contact Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 6 Enumerated_Domain_Value_Definition: Contact, approximately located Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 11 Enumerated_Domain_Value_Definition: Fault. *** Note: arcs having the software-defined attribute/column FID whose values are "83, 85, 89, 92, 98, 104, 147, 163, 182, 185, 197, 216, 217, 224, 261, 278, 287, 401, 412, 428, 429, 441, 443, 451, 467, 476, 536, 545, 547, 559, 562, 566, 571, 594, 597, 607, 618, 636, 643, 677, 690, 792, 794, 810, 859, 860, 863, 896, 963, 980, 1019, 1060, 1076, 1082, 1098, 1105, 1137, and 1168" represent the Victoria Creek Fault. The annotation "Victoria Creek Fault", as seen on the Interpretive Geologic Bedrock Map of the Tanana B-1 Quadrangle, Central Alaska (Publication RI-97-15A-SH1), is not preserved in the structure data. *** Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 13 Enumerated_Domain_Value_Definition: Fault, inferred Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 17 Enumerated_Domain_Value_Definition: Thrust fault, sawteeth on upper plate, user will need to see the Interpretive Geologic Bedrock Map of the Tanana B-1 Quadrangle, Central Alaska (Publication RI 97-15A-SH1) for interpretation of relative plate motion Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 19 Enumerated_Domain_Value_Definition: Thrust fault, inferred, user will need to see the Interpretive Geologic Bedrock Map of the Tanana B-1 Quadrangle, Central Alaska (Publication RI 97-15A-SH1) for interpretation of relative plate motion Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Numerical assignment of cartographic lines Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: *** Note: A code value of "0" does not actually exist for this particular feature. The correct code value for the software-defined attribute/column FID whose values are "145, 152, 220, and 295" should be "6" (see below). *** Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 6 Enumerated_Domain_Value_Definition: Fault Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 7 Enumerated_Domain_Value_Definition: Fault, inferred Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 8 Enumerated_Domain_Value_Definition: Thrust fault, sawteeth on upper plate, user will need to see the Interpretive Geologic Bedrock Map of the Tanana B-1 Quadrangle, Central Alaska (Publication RI 97-15A-SH1) for interpretation of relative plate motion. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 9 Enumerated_Domain_Value_Definition: Thrust fault, inferred. User will need to see the Interpretive Geologic Bedrock Map of the Tanana B-1 Quadrangle, Central Alaska (Publication RI 97-15A-SH1) for interpretation of relative plate motion. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 21 Enumerated_Domain_Value_Definition: Thrust fault, concealed Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 22 Enumerated_Domain_Value_Definition: Fault, concealed Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: SURFBED Attribute_Definition: Defines whether or not the polygon is categorized as a bedrock or surficial geologic unit Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: B Enumerated_Domain_Value_Definition: Categorized as a bedrock geologic unit Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: S Enumerated_Domain_Value_Definition: Categorized as a surficial geologic unit Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: foldcode_arc Entity_Type_Label: foldcode_arc.shp Entity_Type_Definition: Object type is vector, there are 449 rows associated with this entity, and the entity values refer to comprehensive geologic structural fold lines, anticlines, or synclines Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: SYMBOL Attribute_Definition: Line symbols for types of folds, anticlines, or synclines Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 19 Enumerated_Domain_Value_Definition: *** Note: The "SYMBOL" value of "19" listed is incorrect. The correct value should be "36", which is defined as an inferred anticline or syncline. *** Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 34 Enumerated_Domain_Value_Definition: Fold axis, anticline or syncline. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 35 Enumerated_Domain_Value_Definition: Anticline or syncline, approximately located. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 36 Enumerated_Domain_Value_Definition: Anticline or syncline, inferred. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 37 Enumerated_Domain_Value_Definition: Anticline or syncline, probable. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 38 Enumerated_Domain_Value_Definition: Anticline or syncline, concealed. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Numerical assignment of cartographic lines Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 10 Enumerated_Domain_Value_Definition: Fold axis Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 11 Enumerated_Domain_Value_Definition: Fold axis, approximate location Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Fold axis, inferred Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 13 Enumerated_Domain_Value_Definition: Fold axis, probable Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 14 Enumerated_Domain_Value_Definition: Fold axis, concealed Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: SURFBED Attribute_Definition: Defines whether or not the polygon is categorized as a bedrock or surficial geologic unit Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: B Enumerated_Domain_Value_Definition: Categorized as a bedrock geologic unit Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: S Enumerated_Domain_Value_Definition: Categorized as a surficial geologic unit Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: Natural Resource Technician Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5020 Contact_TDD/TTY_Telephone: None available. Contact_Facsimile_Telephone: 907-451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our web site (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: Report of Investigation 97-15A Distribution_Liability: The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester or anyone else exceed the fee paid for the electronic service or product. Standard_Order_Process: Non-digital_Form: Current publication is available on paper. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Fees: Printed publication can be purchased for $15.00 (contact information below) plus shipping if mailed. 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Metadata_Reference_Information: Metadata_Date: 20080506 Metadata_Review_Date: 20080506 Metadata_Future_Review_Date: 20090322 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical address Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5039 Contact_Facsimile_Telephone: 907-451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays. Contact_Instructions: Please contact us through the e-mail address above whenever possible. Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: none Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.