Identification_Information: Citation: Citation_Information: Originator: Reifenstuhl, R.R. Originator: Dover, J.H. Originator: Newberry, R.J. Originator: Clautice, K.H. Originator: Liss, S.A. Originator: Blodgett, R.B. Originator: Weber, F.R. Publication_Date: 1998 Title: Interpretive geologic bedrock map of the Tanana A-1 and A-2 quadrangles, central Alaska Geospatial_Data_Presentation_Form: map and vector digital data Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-37B v 1.1 Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS) Other_Citation_Details: 17 p., 1 sheet, scale 1:63,360 Online_Linkage: http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1864 Description: Abstract: This report provides detailed (1:63,360-scale) mapping of the Tanana A-1 and A-2 quadrangles (500 square miles; equivalent to eight 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 south of the Tanana B-1 Quadrangle. This report includes detailed bedrock, structural, and stratigraphic data. The Tanana A-1 and A-2 Quadrangles and surrounding area comprise several isolated mountainous ridges in the western Yukon-Tanana Upland of interior Alaska. Purpose: The Tanana A-1 and A-2 Quadrangles lie between the villages of Rampart, on the Yukon River, and Manley Hot Springs, at the terminus of the Elliott Highway. At the time the report 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 expanded mineral exploration and development that can lead to the economic growth and the creation of new jobs needed by the Rampart-Manley-Tofty region's inhabitants and the State of Alaska. These objectives are consistent with the statewide goals and priorities articulated for the Department of Natural Resources by Alaska's Governor in his Executive Budget Summary for Fiscal Year 1997. 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." The numerical value(s) "1" and/or "2" included in the layer names correspond to the quadrangle(s) Tanana A-1 and/or Tanana A-2, respectively. Layers include: >hflsa1_polygon geologic bedrock unit polygons (hornfels) >hflsa2_polygon geologic bedrock unit polygons (hornfels) >tana12_att_point points for the strike, dip, and plunge of bedding planes, foliation, and various lineaments >tana1bur_arc vector lines for various types of geophysical features >tana1fld_arc types of folds, anticlines, synclines, or lines depicting a cross-section >tana1fld_point points for types of anticlines or synclines >tana1geo_arc geologic bedrock unit contacts (arc) >tana1geo_polygon geologic bedrock units (polygon) >tana1str_arc vector lines for types of faults >tana2bur_arc vector lines for various types of geophysical features >tana2fld_arc types of folds, anticlines, synclines, or lines depicting a cross-section >tana2fld_point points for types of anticlines or synclines >tana2geo_arc geologic bedrock unit contacts (arc) >tana2geo_polygon geologic bedrock units (polygon) >tana2str_arc vector lines for types of faults Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1997 Ending_Date: 1998 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -151.018782 East_Bounding_Coordinate: -149.971866 North_Bounding_Coordinate: 65.259054 South_Bounding_Coordinate: 64.990820 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: 40Ar/39Ar Theme_Keyword: Aerial Photography Theme_Keyword: Aeromagnetic Survey Theme_Keyword: Age Dates Theme_Keyword: Bedrock Theme_Keyword: Cerium Theme_Keyword: CIPW Norms Theme_Keyword: Conductivity Survey Theme_Keyword: Dome Theme_Keyword: Economic Geology Theme_Keyword: Faults Theme_Keyword: Fossils Theme_Keyword: Geochemical Surveys Theme_Keyword: Geological Process Theme_Keyword: Glaciers Theme_Keyword: Gold Theme_Keyword: Isotopes Theme_Keyword: K-Ar Theme_Keyword: Major Oxides Theme_Keyword: Modal Analysis Theme_Keyword: Niobium Theme_Keyword: Permeability Theme_Keyword: Petroleum Theme_Keyword: Placer Theme_Keyword: Production Data Theme_Keyword: Resource Assessment Theme_Keyword: Rocks Theme_Keyword: Silver Place: Place_Keyword_Thesaurus: None Place_Keyword: Manley Basin Place_Keyword: Manley Hot Springs Place_Keyword: Yukon River Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: Amy Creek Assemblage Stratum_Keyword: Hot Springs Pluton Stratum_Keyword: Livengood Dome Chert Stratum_Keyword: Wickersham Unit Stratum_Keyword: Wilber Creek Ash Stratum_Keyword: Wolverine Creek Sequence Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Cambrian Temporal_Keyword: Carboniferous Temporal_Keyword: Cenozoic Temporal_Keyword: Cretaceous Temporal_Keyword: Devonian Temporal_Keyword: Famennian Temporal_Keyword: Jurassic Temporal_Keyword: Mesozoic Temporal_Keyword: Mississippian Temporal_Keyword: Ordovician Temporal_Keyword: Paleozoic Temporal_Keyword: Permian Temporal_Keyword: Proterozoic 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: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Contact_Voice_Telephone: (907) 451-5020 Contact_Voice_Telephone: (907) 451-5029 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.dnr.state.ak.us 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 03HQAG0055 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: Newberry, R.J. Originator: Clautice, K.H. Originator: Pinney, D.S. Originator: Liss, S.A. Originator: Blodgett, R.B. Originator: Weber, F.R. Publication_Date: 1998 Title: Geologic map of the Tanana A-1 and A-2 quadrangles, central Alaska Geospatial_Data_Presentation_Form: map, vector digital data, and text report Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-37A Publication_Information: Publication_Place: Fairbanks, AK, USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Other_Citation_Details: 19 p., 1 sheet, scale 1:63,360 Online_Linkage: http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1863 Cross_Reference: Citation_Information: Originator: Pinney, D.S. Publication_Date: 1998 Title: Surficial geologic map of the Tanana A-1 and A-2 quadrangles, central Alaska Geospatial_Data_Presentation_Form: map and vector digital data Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-37C 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://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1865 Cross_Reference: Citation_Information: Originator: Pinney, D.S. Publication_Date: 1998 Title: Derivative engineering geologic map of the Tanana A-1 and A-2 quadrangles, central Alaska Geospatial_Data_Presentation_Form: map and vector digital data Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-37D 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://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1866 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Location data for geologic point data were entered manually from GPS units into a spreadsheet. 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, their age, and field sample locations, structural features, structural measurements, and geology interpreted from airborne geophysics. 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. 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. The bedrock 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. 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. 271-286 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: p. 38 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 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: p. 49 Online_Linkage: http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=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 (PDF 98-37C). 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: p. 125 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 (PDF 98-37C and PDF 98-37D). Source_Information: Source_Citation: Citation_Information: Originator: Yeend, W.E. Publication_Date: 1989 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 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1989 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Yeend, 1989 Source_Contribution: This report contains information that was used to aid in the creation of and sample preparation for the surficial geologic map (PDF 98-37C). Process_Step: Process_Description: Field work - Field work for bedrock investigations, including ridge traverses and examination of riverbank exposures, was conducted between June 16 and July 8, 1997. Field notes and rock samples were collected at approximately 700 stations throughout the Tanana A1 and A2 Quadrangles. Bedrock mappers recorded observations on 1:50,000 and 1:63,360-scale topographic base maps, compiled onto a 1:50,000-scale 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: 1997 Process_Step: Process_Description: Digital Cartography - 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. Process_Date: 1997 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: tana1geo_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 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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: tana1geo_arc Entity_Type_Label: tana1geo_arc.shp Entity_Type_Definition: Object type is vector, there are 131 rows associated with this entity, and the entity values refer to interpretive geologic bedrock unit contacts Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE 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: 5 Enumerated_Domain_Value_Definition: Contact Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana1geo_polygon Entity_Type_Label: tana1geo_polygon.shp Entity_Type_Definition: Object type is vector, there are 55 rows associated with this entity, and the entity values refer to interpretive geologic bedrock polygons Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: BUNIT Attribute_Definition: Interpretive geologic bedrock unit labels Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kwcv Enumerated_Domain_Value_Definition: Wilber Creek unit siliciclastic and volcaniclastic rocks (late Albian(?): Weber and others, 1992)-Very dark gray to dark greenish dark gray, volcanic clast-bearing, poorly sorted, sub-angular, medium- to coarse-grained, marine, argillaceous lithic sandstone, shale and siltstone. Estimates of the framework grain composition are: 55 percent chert, 25 percent quartz, 15 percent plagioclase (which includes about 5 percent obvious volcanic clasts), and 5 percent sedimentary and metamorphic rock fragments, and minor white mica. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kwcs Enumerated_Domain_Value_Definition: Wilber Creek unit sandstone, shale, siltstone, undivided (Albian: Weber and others, 1992)-Very dark gray to dark greenish gray, poorly sorted, marine, argillaceous lithic sandstone, shale and siltstone containing white mica-bearing argillaceous sandstone as laminae and thin interbeds; rare conglomerate. Beds are typically thin, parallel, laterally continuous, sharp-based, and graded; from fine to medium grained at the base, grading up to silt at the top of beds. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: KJwq Enumerated_Domain_Value_Definition: Wolverine quartzite unit (Early Cretaceous and Late Jurassic: Weber and others, 1992)-Very light gray to tan, white- to medium gray-weathering, moderately well-sorted, subrounded, fine- to medium-grained quartzite, and sublitharenite with interbedded shaley rocks. Estimates of sandstone clast composition indicate greater than 90 percent quartz (rare light-blue color), two to five percent chert, and locally trace amounts of feldspar and white mica. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: KJws Enumerated_Domain_Value_Definition: Wolverine quartzite unit sandstone and shale-undivided (Early Cretaceous and Late Jurassic: Weber and others, 1992)-Medium gray to light gray, locally black, lichen-covered, quartz-rich sandstone and interbedded shale. Sandstone is silica-cemented, well-indurated quartzarenite but lacks the prominent outcrop pattern, continuity, and thickness of the quartzite unit (map unit "KJwq"). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: TrPs Enumerated_Domain_Value_Definition: ***Note: typographical error exists on the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-SH1). Unit TrPa does not exist. Unit label should read TrPs.*** Argillite, sandstone and shale (Triassic and Permian: Reifenstuhl and others, 1997a)-Dark gray to very dark gray, typically fine to very fine grained, argillaceous siliciclastic rocks,with common orange-brown weathering surfaces. Rocks have a better developed low-grade metamorphic fabric (phyllitic) compared to the Cretaceous to Jurassic age sandstone and shale lithologies above (map units "KJwq", "KJws"). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: TrPp Enumerated_Domain_Value_Definition: Conglomerate (Triassic and Permian: Reifenstuhl and others, 1997a)-Very dark gray, orange-brown-weathering, matrix-supported, chert-pebble to cobble conglomerate. Matrix is dark gray argillite to very fine sand, and clasts are sub-rounded pebble to cobble size. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Mg Enumerated_Domain_Value_Definition: Globe quartzite unit (Mississippian: Weber and others, 1992; Mortensen and Thompson, 1990)-Light gray, light- to medium-gray weathering and iron-stained, fine to medium-grained, bimodal to moderately sorted, distinctive vitreous quartzite, with interbedded medium to dark gray slate, phyllite, and shaley rocks. Framework grains are well rounded to subrounded monocrystalline quartz, and minor chert clasts. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Dl Enumerated_Domain_Value_Definition: Devonian limestone fault slivers at Granite Creek [Famennian (late Late Devonian): this report]-Dark gray, light gray-weathering, lime mudstone. Uppermost strata of the largest fault sliver include abundant floating quartz grains up to 3 mm in diameter, which are increasingly abundant down-section. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Dc Enumerated_Domain_Value_Definition: Conglomerate (Late Devonian?: this report)-Dark gray to very dark gray, brown-weathering, clast-supported, chert-pebble to cobble conglomerate; matrix consists of siliciclastic and carbonate material, and clasts are sub-rounded pebble to cobble size. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pzlca Enumerated_Domain_Value_Definition: Chert and cherty argillite (Ordovician)-Heterogeneous unit composed dominantly of light gray to gray, thinly laminated, recrystallized sericitic chert and siliceous argillite, commonly with phyllitic argillite partings; "cherty argillite" typically has cherty or mylonitic aspect on weathered surfaces, but fine-grained elastic or recrystallized texture on fresh surfaces. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pzlv Enumerated_Domain_Value_Definition: Volcanic unit (Ordovician)-Greenish-gray, chloritic and feldspathic rocks and greenstone. Protolith of volcanic rocks is volcaniclastic, tuffaceous, and flow rocks of basaltic to intermediate composition. Some rocks are diabasic and may be meta-intrusive rocks; the number of metavolcanic layers is uncertain. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pzlo Enumerated_Domain_Value_Definition: Orum limestone (Middle Ordovician to Neoproterozoic: informal name, Hopkins and Taber, unpublished manuscript)-Light to medium gray, tan to reddish brown-weathering, extensively recrystallized, typically thin- to medium-bedded lime mudstone. Unit is locally thick-bedded, and locally includes ooid grainstones and cryptalgal lamination. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ofc Enumerated_Domain_Value_Definition: Fossil Creek volcanics (Late to Early Ordovician: Weber and others, 1992)-Heterogeneous assemblage of basalt, agglomerate, volcaniclastic conglomerate, lime wackestone, calcareous feldspathic sandstone, shale, siltstone, chert, slate, and phyllite. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PzPad Enumerated_Domain_Value_Definition: Dolostone and limestone-White to light gray, massive-bedded, locally laminated, siliceous dolostone and medium gray to dark gray lime mudstone, in approximately equal amounts. Dolostone is typically extensively silicified and characterized by box-work silica network. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PzPag Enumerated_Domain_Value_Definition: Greenstone-Dark greenish gray, massive to well-foliated, locally magnetic greenstone, amygdaloidal greenstone, and agglomeratic greenstone; basaltic to intermediate composition. Contains calcite amygdule fillings, locally abundant pyrite cubes, and slightly stretched volcanic and carbonate clasts up to cobble size. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PzPac Enumerated_Domain_Value_Definition: Cherty-argillite and chert-Heterogeneous unit of dominantly black to dark gray chert and siliceous to carbonaceous argillite with well-developed phyllitic to subphyllitic slate-like cleavage, and containing one or more dark gray limestone layers or lenses. The geochemical signature of this unit is typical of the chert in the Amy Creek unit (Haug and others, 1997) of Weber and others (1988). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PzPwg Enumerated_Domain_Value_Definition: Siliciclastic rock-Medium gray, tan-weathering, thin-bedded, fine-grained argillaceous sandstone, siltstone, rare greenstone (?), and phyllitic argillite. Locally, these rocks include up to 30 percent calcite that likely represents recrystallized matrix. Black, non-calcareous, carbonaceous, phyllitic argillite interbeds and partings are common. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tg Enumerated_Domain_Value_Definition: Hot Springs granite pluton (58 Ma) Medium- to coarse-grained biotite granite and rare tourmaline-biotite granite. Outcrops as subdued, blocky rubble or a brown gruss. The dominant textural variety contains coarse-grained potassium feldspar (30 percent) in a matrix of medium-grained smoky quartz (30 percent), albitic plagioclase (30 percent), and slightly chloritized biotite (10 percent). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kmzd Enumerated_Domain_Value_Definition: Monzodiorite- Black and white 'peppered', medium grained, subequigranular, alkalic plutonic rock lacking quartz and with more plagioclase than alkali feldspar. Mafic minerals (clinopyroxene > biotite > hornblende) commonly make up more than 50 percent of the rock. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: JRc Enumerated_Domain_Value_Definition: Carbonatite - (approximately 200 Ma) Medium to coarse grained, dolomite-calcite-magnetite-apatite-rich rock, which weathers to a deep red gossan and is characterized by an intense magnetic high. Occurs as two steeply-dipping sills (?) up to 30 m thick, which may be a single sill or dike that is repeated by isoclinal folding. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana2geo_arc Entity_Type_Label: tana2geo_arc.shp Entity_Type_Definition: Object type is vector, there are 293 rows associated with this entity, and the entity values refer to interpretive geologic bedrock unit contacts Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE 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: 5 Enumerated_Domain_Value_Definition: Contact Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana2geo_polygon Entity_Type_Label: tana2geo_polygon.shp Entity_Type_Definition: Object type is vector, there are 61 rows associated with this entity, and the entity values refer to interpretive geologic bedrock polygons Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: BUNIT Attribute_Definition: Interpretive geologic bedrock unit labels Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: FZONE Enumerated_Domain_Value_Definition: Kaltag Fault Zone- Major dextral stirke-slip fault zone connecting Tintina Fault Zone. The Kaltag fault zone is topographically subdued but cuts the Amy Creek dolomite unit and the Livengood Chert unit. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kwcq Enumerated_Domain_Value_Definition: Wilber Creek unit quartzite (Albian: Weber and others, 1992)-Medium gray to light gray, highly quartzitic, hard, dense, argillaceous lithic quartzite. Quartzite interbeds occur locally as abundant laminae up to 20 cm thick in the Wilber Creek unit (map unit "Kwcs") on the northern side of Manley Dome (where it is a mappable unit). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kdm Enumerated_Domain_Value_Definition: Mafic dikes (95 Ma)-Very dark gray and greenish very dark gray, very fine grained hypabyssal dikes. Composition ranges from monzodiorite to monzonite, with little or no quartz, abundant clinopyroxene, and plagioclase subequal in abundance to alkali feldspar. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kgs Enumerated_Domain_Value_Definition: Granite and quartz syenite-Buff to light gray, fine to coarse grained, sub-equigranular, holocrystalline rock. The rock exhibits slight hydrothermal alteration, with feldspar partly converted to fine-grained white mica. Quartz/(quartz + total feldspar) ratios vary from 15 to 35 percent, and the bulk of the feldspar appears to be K-feldspar. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ksy Enumerated_Domain_Value_Definition: Syenite and quartz syenite - Black and white 'peppered', coarse to medium grained, subequigranular to trachytoid, syenite and quartz syenite. With the exception of euhedral, megacrystic, alkali feldspar, the minerals are typically subhedral and anhedral. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kmo Enumerated_Domain_Value_Definition: Monzonite - Black and white 'peppered', coarse to medium grained, locally foliated, subequigranular to trachytoid, porphyritic monzonite and quartz monzonite. Mineralogy is typically subhedral and anhedral, with the exception of euhedral megacrystic alkali feldspar. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pzum Enumerated_Domain_Value_Definition: Ultramafic rocks - (approximately 540 Ma) Serpentinite, gabbro, and minor roddingite, which weather to a buff-colored massive rubble. Predominantly serpentinite, consisting of fine-grained, moderately foliated to unfoliated serpentine-talc with 2 to 5 percent fine- to medium-grained magnetite, 0 to 20 percent magnesite, 0 to 25 percent altered, medium-grained orthopyroxene, 0.1 to 0.5 percent fine- to medium-grained chromite, and 0 to 1 percent fine-grained chlorite. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kwcv Enumerated_Domain_Value_Definition: Wilber Creek unit siliciclastic and volcaniclastic rocks (late Albian(?): Weber and others, 1992)-Very dark gray to dark greenish dark gray, volcanic clast-bearing, poorly sorted, sub-angular, medium- to coarse-grained, marine, argillaceous lithic sandstone, shale and siltstone. Estimates of the framework grain composition are: 55 percent chert, 25 percent quartz, 15 percent plagioclase (which includes about 5 percent obvious volcanic clasts), and 5 percent sedimentary and metamorphic rock fragments, and minor white mica. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kwcs Enumerated_Domain_Value_Definition: Wilber Creek unit sandstone, shale, siltstone, undivided (Albian: Weber and others, 1992)-Very dark gray to dark greenish gray, poorly sorted, marine, argillaceous lithic sandstone, shale and siltstone containing white mica-bearing argillaceous sandstone as laminae and thin interbeds; rare conglomerate. Beds are typically thin, parallel, laterally continuous, sharp-based, and graded; from fine to medium grained at the base, grading up to silt at the top of beds. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: KJwq Enumerated_Domain_Value_Definition: Wolverine quartzite unit (Early Cretaceous and Late Jurassic: Weber and others, 1992)-Very light gray to tan, white- to medium gray-weathering, moderately well-sorted, subrounded, fine- to medium-grained quartzite, and sublitharenite with interbedded shaley rocks. Estimates of sandstone clast composition indicate greater than 90 percent quartz (rare light-blue color), two to five percent chert, and locally trace amounts of feldspar and white mica. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: KJws Enumerated_Domain_Value_Definition: Wolverine quartzite unit sandstone and shale-undivided (Early Cretaceous and Late Jurassic: Weber and others, 1992)-Medium gray to light gray, locally black, lichen-covered, quartz-rich sandstone and interbedded shale. Sandstone is silica-cemented, well-indurated quartzarenite but lacks the prominent outcrop pattern, continuity, and thickness of the quartzite unit (map unit "KJwq"). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: TrPs Enumerated_Domain_Value_Definition: ***Note: typographical error exists on the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-SH1). Unit TrPa does not exist. Unit label should read TrPs.*** Argillite, sandstone and shale (Triassic and Permian: Reifenstuhl and others, 1997a)-Dark gray to very dark gray, typically fine to very fine grained, argillaceous siliciclastic rocks,with common orange-brown weathering surfaces. Rocks have a better developed low-grade metamorphic fabric (phyllitic) compared to the Cretaceous to Jurassic age sandstone and shale lithologies above (map units "KJwq", "KJws"). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: TrPp Enumerated_Domain_Value_Definition: Conglomerate (Triassic and Permian: Reifenstuhl and others, 1997a)-Very dark gray, orange-brown-weathering, matrix-supported, chert-pebble to cobble conglomerate. Matrix is dark gray argillite to very fine sand, and clasts are sub-rounded pebble to cobble size. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Dc Enumerated_Domain_Value_Definition: Conglomerate (Late Devonian?: this report)-Dark gray to very dark gray, brown-weathering, clast-supported, chert-pebble to cobble conglomerate; matrix consists of siliciclastic and carbonate material, and clasts are sub-rounded pebble to cobble size. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pzlca Enumerated_Domain_Value_Definition: Chert and cherty argillite (Ordovician)-Heterogeneous unit composed dominantly of light gray to gray, thinly laminated, recrystallized sericitic chert and siliceous argillite, commonly with phyllitic argillite partings; "cherty argillite" typically has cherty or mylonitic aspect on weathered surfaces, but fine-grained elastic or recrystallized texture on fresh surfaces. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pzlv Enumerated_Domain_Value_Definition: Volcanic unit (Ordovician)-Greenish-gray, chloritic and feldspathic rocks and greenstone. Protolith of volcanic rocks is volcaniclastic, tuffaceous, and flow rocks of basaltic to intermediate composition. Some rocks are diabasic and may be meta-intrusive rocks; the number of metavolcanic layers uncertain. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pzlo Enumerated_Domain_Value_Definition: Orum limestone (Middle Ordovician to Neoproterozoic: informal name, Hopkins and Taber, unpublished manuscript)-Light to medium gray, tan to reddish brown-weathering, extensively recrystallized, typically thin- to medium-bedded lime mudstone. Unit is locally thick-bedded, and locally includes ooid grainstones and cryptalgal lamination. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PzPad Enumerated_Domain_Value_Definition: Dolostone and limestone-White to light gray, massive-bedded, locally laminated, siliceous dolostone and medium gray to dark gray lime mudstone, in approximately equal amounts. Dolostone is typically extensively silicified and characterized by box-work silica network. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PzPac Enumerated_Domain_Value_Definition: Cherty-argillite and chert-Heterogeneous unit of dominantly black to dark gray chert and siliceous to carbonaceous argillite with well-developed phyllitic to subphyllitic slate-like cleavage, and containing one or more dark gray limestone layers or lenses. The geochemical signature of this unit is typical of the chert in the Amy Creek unit (Haug and others, 1997) of Weber and others (1988). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tg Enumerated_Domain_Value_Definition: Hot Springs granite pluton (58 Ma&Medium- to coarse-grained biotite granite and rare tourmaline-biotite granite. Outcrops as subdued, blocky rubble or a brown gruss. The dominant textural variety contains coarse-grained potassium feldspar (30 percent) in a matrix of medium-grained smoky quartz (30 percent), albitic plagioclase (30 percent), and slightly chloritized biotite (10 percent). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kmzd Enumerated_Domain_Value_Definition: Monzodiorite- Black and white 'peppered', medium grained, subequigranular, alkalic plutonic rock lacking quartz and with more plagioclase than alkali feldspar. Mafic minerals (clinopyroxene > biotite > hornblende) commonly make up more than 50 percent of the rock. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: JRc Enumerated_Domain_Value_Definition: Carbonatite - (approximately 200 Ma) Medium to coarse grained, dolomite-calcite-magnetite-apatite-rich rock, which weathers to a deep red gossan and is characterized by an intense magnetic high. Occurs as two steeply-dipping sills (?) up to 30 m thick, which may be a single sill or dike that is repeated by isoclinal folding. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: hflsa1_polygon Entity_Type_Label: hflsa1_polygon.shp Entity_Type_Definition: Object type is vector, there is 1 row associated with this entity, and the entity values refer to interpretive geologic bedrock polygons Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: UNIT Attribute_Definition: Generic geologic map unit labels Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HFELS Enumerated_Domain_Value_Definition: Hornfels near intrusions are very dark gray to black, very fine to fine grained, hard, dense rocks with common disoriented crystals or rosettes of muscovite, biotite, and locally andalusite. Typically formed by contact metamorphism. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: hflsa2_polygon Entity_Type_Label: hflsa2_polygon.shp Entity_Type_Definition: Object type is vector, there are 5 rows associated with this entity, and the entity values refer to interpretive geologic bedrock polygons Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: UNIT Attribute_Definition: Generic geologic map unit labels Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NM Enumerated_Domain_Value_Definition: Not mapped, region is irrelevant and not meaningful for the particular data layer Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HFELS Enumerated_Domain_Value_Definition: Hornfels near intrusions are very dark gray to black, very fine to fine grained, hard, dense rocks with common disoriented crystals or rosettes of muscovite, biotite, and locally andalusite. Typically formed by contact metamorphism. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana1str_arc Entity_Type_Label: tana1str_arc.shp Entity_Type_Definition: Object type is vector, there are 178 rows associated with this entity, and the entity values refer to types of faults Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE 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: 11 Enumerated_Domain_Value_Definition: Fault. ***Note: arcs having the software-defined attribute/column FID whose values are between 140-142 represent the Stevens Creek Fault (continued in Entity_Attribute_Layer "tana2str" listed below). The annotation "Stevens Creek Fault", as seen on the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-SH1), is not preserved in the structure coverage.*** Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Fault approximately located 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 Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-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: 18 Enumerated_Domain_Value_Definition: Thrust fault, approximately located, user will need to see the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-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: 20 Enumerated_Domain_Value_Definition: Thrust fault, probable, user will need to see the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-SH1) for interpretation of relative plate motion Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana2str_arc Entity_Type_Label: tana2str_arc.shp Entity_Type_Definition: Object type is vector, there are 276 rows associated with this entity, and the entity values refer to types of faults Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE 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: 11 Enumerated_Domain_Value_Definition: Fault. ***Note: arcs having the software-defined attribute/column FID whose values are between 37-48, 54-58, 61, and 62 represent the Stevens Creek Fault (continued from the Entity_Attribute_Layer "tana1str" listed above). The annotation "Stevens Creek Fault", as seen on the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-SH1), is not preserved in the structure coverage.*** Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Fault approximately located 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 Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-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: 18 Enumerated_Domain_Value_Definition: Thrust fault, approximately located, user will need to see the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-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: 20 Enumerated_Domain_Value_Definition: Thrust fault, probable, user will need to see the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-SH1) for interpretation of relative plate motion Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana1fld_arc Entity_Type_Label: tana1fld_arc.shp Entity_Type_Definition: Object type is vector, there are 11 rows associated with this entity, and the entity values refer to types of folds, anticlines, synclines, or lines depicting a cross-section Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Line symbols for types of folds, anticlines, synclines, or lines depicting a cross-section Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: Generic line depicting a type of fold, anticline, syncline, or cross-section location. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline (see Entity_Type_Label "tana1fld.pat" below). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 36 Enumerated_Domain_Value_Definition: Inferred anticline or syncline. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline (see Entity_Type_Label "tana1fld.pat" below). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: XSECT Attribute_Definition: Indicates whether or not the line represents a cross-section. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: "Yes"- The line represents a cross-section. "No"- The line does not represent a cross-section. Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana1fld_point Entity_Type_Label: tana1fld_point.shp Entity_Type_Definition: Object type is point, there are 9 rows associated with this entity, and the entity values refer to types of anticlines or synclines Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Point 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: 22 Enumerated_Domain_Value_Definition: Anticline Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 23 Enumerated_Domain_Value_Definition: Syncline Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 27 Enumerated_Domain_Value_Definition: Overturned anticline, showing direction of dip of limbs Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana2fld_arc Entity_Type_Label: tana2fld_arc.shp Entity_Type_Definition: Object type is vector, there are 28 rows associated with this entity, and the entity values refer to types of folds, anticlines, synclines, or lines depicting a cross-section Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Line symbols for types of folds, anticlines, synclines, or lines depicting a cross-section Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: Generic line depicting a type of fold, anticline, syncline, or cross-section location. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline (see Entity_Type_Label "tana2fld.pat" below). 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. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline (see Entity_Type_Label "tana2fld.pat" below). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 36 Enumerated_Domain_Value_Definition: Inferred anticline or syncline. This line, in combination with the proper point symbol, indicates the location of an anticline or syncline (see Entity_Type_Label "tana2fld.pat" below). Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: XSECT Attribute_Definition: Indicates whether or not the line represents a cross-section. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: "Yes"- The line represents a cross-section. "No"- The line does not represent a cross-section. Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana2fld_point Entity_Type_Label: tana2fld_point.shp Entity_Type_Definition: Object type is point, there are 31 rows associated with this entity, and the entity values refer to types of anticlines or synclines Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Point 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: 22 Enumerated_Domain_Value_Definition: Anticline Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 23 Enumerated_Domain_Value_Definition: Syncline Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 26 Enumerated_Domain_Value_Definition: Overturned syncline, showing direction of dip of limbs Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana1bur_arc Entity_Type_Label: tana1bur_arc.shp Entity_Type_Definition: Object type is vector, there are 5 rows associated with this entity, and the entity values refer to various types of geophysical features as described in the accompanying report Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Line symbols for various types of geophysical features 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: 64 Enumerated_Domain_Value_Definition: Buried anomaly, boundary of airborne geophysical signature: high magnetics and low resistivity Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana2bur_arc Entity_Type_Label: tana2bur_arc.shp Entity_Type_Definition: Object type is vector, there are 5 rows associated with this entity, and the entity values refer to various types of geophysical features as described in the accompanying report Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: CODE Attribute_Definition: Line symbols for various types of geophysical features 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: 64 Enumerated_Domain_Value_Definition: Buried anomaly, boundary of airborne geophysical signature: high magnetics and low resistivity Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 65 Enumerated_Domain_Value_Definition: Buried anomaly, boundary of airborne geophysical signature: low magnetics and high resistivity Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: tana12_att_point Entity_Type_Label: tana12_att_point.shp Entity_Type_Definition: Object type is point, there are 444 rows associated with this entity, and the entity values refer to the strike, dip, and plunge of bedding planes, foliation, and various lineaments Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: INDEX Attribute_Definition: Generic example of unique sample identifier or location of a geologic measurement: YrAAA999X: Yr=2 digit year of sample collection, AAA=geologist's initials (one to three characters), 999=unique station number, X=unique alpha character designating a sample was taken at the field station. Geologists' initials are: BT - B. Taber, DS - D. Stevens, JD - J. Dover, KC - K. Clautice, RB - R. Blodgett, RN - R. Newberry, RR - R. Reifenstuhl, SH - S. Haug, SL - S. Liss. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Unique sample number designated by the author(s). Attribute: Attribute_Label: SYMBOL Attribute_Definition: Point symbols for types of bedding and foliation orientation data Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Strike and dip direction of beds Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: Strike and dip direction of beds, top of beds known from sedimentary features Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: Strike and dip direction of overturned beds Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 5 Enumerated_Domain_Value_Definition: Strike of vertical beds, stratigraphic tops to north Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 7 Enumerated_Domain_Value_Definition: Bearing of plunge of lineation Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 9 Enumerated_Domain_Value_Definition: Strike and dip direction of foliation Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Strike and dip direction of cleavage Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 13 Enumerated_Domain_Value_Definition: Strike of vertical cleavage Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 19 Enumerated_Domain_Value_Definition: Strike and dip direction of joints Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 20 Enumerated_Domain_Value_Definition: Strike of vertical joints Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: ANGLE Attribute_Definition: Strike of plane using "Right-hand rule", where north is 0 and degrees increase clockwise to 360, always 90 degrees counter-clockwise from dip direction Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3 Range_Domain_Maximum: 360 Attribute_Units_of_Measure: degrees Attribute: Attribute_Label: DIPANGLE Attribute_Definition: Degrees that a plane is inclined relative to horizontal, horizontal being 0 degrees, vertical being 90 degrees; always 90 degrees clockwise from strike Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 10 Range_Domain_Maximum: 90 Attribute_Units_of_Measure: degrees Attribute: Attribute_Label: SHOW Attribute_Definition: Indicates whether or not the point is printed on the published paper map Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: "Yes"- The point is printed or shown on the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-SH1). "No"- The point is not printed or shown on the Preliminary Interpretive Geologic Bedrock Map of the Tanana A-1 and A-2 Quadrangles, Central Alaska (Publication PDF98-37B-SH1). A value of "No" may indicate that a duplicate value was measured nearby or the point was simply omitted at the discretion of the author(s). 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.dnr.state.ak.us) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: Public Data File 98-37B v 1.1 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 $14.00 (contact information below) plus shipping if mailed. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: PDF Format_Version_Number: 1.6 File_Decompression_Technique: No compression applied Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1864 Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Shapefile Format_Version_Number: ESRI ArcGIS 9.x File_Decompression_Technique: No compression applied Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1864 Offline_Option: Offline_Media: CD-ROM Recording_Format: Joliet Fees: Digital files on CD-ROM are available for $10.00 (contact information below). No fees charged for downloaded files. Ordering_Instructions: Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). The DGGS web site (http://www.dggs.dnr.state.ak.us/) has a list of electronic data available and an order form that can be printed. Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround: Digital downloads: less than 30 minutes for most files. Offline CD/DVD-ROMs: 1-2 weeks unless special arrangements are made and an express fee is paid. Technical_Prerequisites: Please check the MapInfo web site (http://www.mapinfo.com/) for the latest documentation on importing ESRI shape files. Metadata_Reference_Information: Metadata_Date: 20080506 Metadata_Review_Date: 20080506 Metadata_Future_Review_Date: 20090321 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.