Metadata: Identification_Information: Citation: Citation_Information: Originator: Stevens, D.S.P. Publication_Date: 20110630 Title: Surficial-geologic map of the northern Fairbanks mining district, Circle Quadrangle, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Report of Investigations Issue_Identification: RI 2011-4 Publication_Information: Publication_Place: Fairbanks, Alaska Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:50,000 Online_Linkage: http://dx.doi.org/10.14509/22642 Description: Abstract: This surficial-geologic map shows the distribution of unconsolidated deposits and undifferentiated bedrock in the Faith Creek area in the Circle A-4, A-5, B-4, and B-5 quadrangles. This map was prepared principally by the interpretation of 1:63,360-scale, false-color, infrared aerial photographs taken in 1979 and 1981 and is locally verified by ground observations during field work in 2007. Purpose: The purpose of this map is to show the distribution of unconsolidated geologic deposits and related features in the northern Fairbanks mining district. Supplemental_Information: This project includes the following shapefiles: >NEF_border Polygon of boundary outline of the mapped area. >NEF_cirques Polylines showing headwalls of possible cirques. >NEF_geology Polygons of surficial-geologic map units. >NEF_photolinears Polylines showing photolinears. >NEF_pingos Points showing locations of pingos. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -146.473760 East_Bounding_Coordinate: -145.989693 North_Bounding_Coordinate: 65.409012 South_Bounding_Coordinate: 65.209562 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: ADGGS keywords Theme_Keyword: Aerial Geology Theme_Keyword: Alluvial Deposits Theme_Keyword: Alluvial Fan Theme_Keyword: Alluvium Theme_Keyword: Colluvial Deposits Theme_Keyword: Colluvium Theme_Keyword: Complex Deposits Theme_Keyword: Fluvial Theme_Keyword: Geologic Map Theme_Keyword: Geomorphology Theme_Keyword: Glacial Deposits Theme_Keyword: Glacial Drift Theme_Keyword: Glacial Geology Theme_Keyword: Landslide Theme_Keyword: Landslide Deposit Theme_Keyword: Man-Made Deposits Theme_Keyword: Mining Theme_Keyword: Placer Theme_Keyword: Pingos Theme_Keyword: Surficial Theme_Keyword: Surficial Geologic Map Theme_Keyword: Surficial Geology Theme_Keyword: Terrace Theme_Keyword: Till Place: Place_Keyword_Thesaurus: ADGGS keywords Place_Keyword: Chatanika River Place_Keyword: Circle Quadrangle Place_Keyword: Fairbanks Mining District Place_Keyword: Faith Creek Place_Keyword: Sourdough Camp Place_Keyword: Steese Highway Stratum: Stratum_Keyword_Thesaurus: ADGGS keywords Stratum_Keyword: Little Champion glaciation Stratum_Keyword: Prindle glaciation Temporal: Temporal_Keyword_Thesaurus: ADGGS keywords Temporal_Keyword: Holocene Temporal_Keyword: Cenozoic Temporal_Keyword: Pleistocene Temporal_Keyword: Quaternary Access_Constraints: This map is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Use_Constraints: The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data 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 or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS) Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: Alaska Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5010 Contact_Facsimile_Telephone: 907-451-5050 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Certainty in identification of the map units varies due to the scale and interpretive nature of the mapping. The geologic unit interpretations and boundaries presented in this report result from interpretation of nominal 1:65,000-scale aerial photographs taken in 1979 and 1981, investigative traverses throughout the map area, aerial reconnaissance via helicopter, and examination of road-cuts and river exposures. Surficial-geologic polygons and lines were edited and attributed using ArcGIS. This map has received two technical reviews by scientists familiar with the subject matter. We incorporated the reviewer's suggestions into the final draft. Logical_Consistency_Report: Polygon topology is present and clean on the original geospatial dataset. All polygon features were topologically validated using ArcGIS prior to export to shapefile format. Completeness_Report: The data set utilizes field observations and air photo interpretations to locate and characterize the geologic unit extent and features. It includes geospatial information about units traceable on air photos at a scale of ~1:65000 and/or in the field. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Surficial-geologic map data has a horizontal positional accuracy dependent on: 1) the 1:65,000-scale (nominal) aerial photographs upon which the mapping was done, with an estimated potential error due to a pen line width of approximately 0.25 mm being equivalent to approximately 16.25 meters on the ground; and 2) the accuracy of the orthorectification of the aerial photographs, error magnitude highly variable and potentially large in areas of significant relief but generally has an RMS error of less than 4 pixels, equivalent to approximately 16.5 meters on the ground. Total potential horizontal error for surficial-geologic map features is therefore estimated to be up to 32.75 meters. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Chapin, F.S., III Originator: Viereck, L.A. Originator: Adams, P.C. Originator: Van Cleve, Keith Originator: Fastie, C.L. Originator: Ott, R.A. Originator: Mann, Daniel, Originator: Johnson, J.F. Publication_Date: 2006 Title: Successional processes in the Alaskan boreal forest Geospatial_Data_Presentation_Form: book chapter Publication_Information: Publication_Place: New York Publisher: Oxford University Press Other_Citation_Details: p. 100-120 Larger_Work_Citation: Citation_Information: Originator: Chapin, F.S., III (ed.) Originator: Oswood, M.W. (ed.) Originator: Van Cleve, Keith (ed.) Originator: Viereck, L.A. (ed.) Originator: Verbyla, D.L. (ed.) Publication_Date: 2006 Title: Alaska's changing boreal forest Geospatial_Data_Presentation_Form: book chapter Publication_Information: Publication_Place: New York Publisher: Oxford University Press Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Chapin and others, 2006 Source_Contribution: Provided information on vegetation succession on floodplains. Source_Information: Source_Citation: Citation_Information: Originator: Kreig, R.A. Originator: Reger, R.D. Publication_Date: 1982 Title: Air-photo analysis and summary of landform soil properties along the route of the Trans-Alaska Pipeline System Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Geologic Report Issue_Identification: GR 66 Publication_Information: Publication_Place: Alaska Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 149 p. Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1982 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Kreig and Reger, 1982 Source_Contribution: Provided information helpful to interpreting aerial photographs and relating the images to geologic processes. Source_Information: Source_Citation: Citation_Information: Originator: Mason, O.K. Originator: Beget, J.E. Publication_Date: 1991 Title: Holocene flood history of the Tanana River, Alaska, U.S.A. Geospatial_Data_Presentation_Form: journal article Series_Information: Series_Name: Arctic and Alpine Research Issue_Identification: v. 23, no. 4 Other_Citation_Details: p. 392-403 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Mason and Beget, 1991 Source_Contribution: Provided information useful for interpreting depositional and flood processes on streams in interior Alaska. Source_Information: Source_Citation: Citation_Information: Originator: Rawlinson, S.E. Originator: Hickmott, D.R. Publication_Date: 1987 Title: Surficial geology, lineaments, and placer resources in the Lime PeakMt. Prindle and Pinnell Mountain Trail areas, east-central Alaska Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Miscellaneous Publication Issue_Identification: MP 29D Publication_Information: Publication_Place: Alaska Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: p. 5.1-5.7, 4 sheets Larger_Work_Citation: Citation_Information: Originator: Smith, T.E. (ed.) Originator: Pessel, G.H. (ed.) Originator: Wiltse, M.A. (ed.) Publication_Date: 1987 Title: Mineral assessment of the Lime PeakMt. Prindle area, Alaska Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Miscellaneous Publication Issue_Identification: MP 29D Publication_Information: Publication_Place: Alaska Publisher: Alaska Division of Geological & Geophysical Surveys Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1987 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Rawlinson and Hickmott, 1987 Source_Contribution: Provided information about previous surficial-geologic mapping in the area. Source_Information: Source_Citation: Citation_Information: Originator: Weber, F.R. Originator: Hamilton, T.D. Publication_Date: 1984 Title: Glacial geology of the Mt. Prindle area, YukonTanana upland, Alaska Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Professional Report Issue_Identification: PR 86 Publication_Information: Publication_Place: Alaska Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: p. 42-48 Larger_Work_Citation: Citation_Information: Originator: Alaska Division of Geological & Geophysical Surveys (ed.) Publication_Date: 1984 Title: Short notes on Alaskan geology Geospatial_Data_Presentation_Form: document Series_Information: Series_Name: Professional Report Issue_Identification: PR 86 Publication_Information: Publication_Place: Alaska Publisher: Alaska Division of Geological & Geophysical Surveys Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1984 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Weber and Hamilton, 1984 Source_Contribution: Provided information about the glacial history of interior Alaska. Process_Step: Process_Description: Fieldwork - Helicopter-supported fieldwork for surficial investigations, including traverses, road-cut investigations, and river exposures, was conducted for one week in June 2007 . Field notes and sediment samples were collected throughout the area for surficial investigations. Surficial mapping involved using Chapin and others (2006), Kreig and Reger (1982), Mason and Beget (1991), Rawlinson and Hickmott (1987), and Weber and Hamilton (1984) on a regular basis for checking glacial geology and general units. Observations were recorded on co-registered acetate overlays on 1:65,000-scale (nominal) color-infrared aerial photographs, and directly on 1:63,360-scale topographic base maps. Stations were located using air photos, topographic maps, and handheld GPS devices with location precision varying from approximately 3 to 15 meters. Source_Used_Citation_Abbreviation: Chapin and others, 2006 Source_Used_Citation_Abbreviation: Kreig and Reger, 1982 Source_Used_Citation_Abbreviation: Mason and Beget, 1991 Source_Used_Citation_Abbreviation: Rawlinson and Hickmott, 1987 Source_Used_Citation_Abbreviation: Weber and Hamilton, 1984 Process_Date: 200706 Process_Step: Process_Description: Geologic map compilation - Surficial-geologic information was interpreted using 1:65,000-scale (nominal) air-photo stereopairs, and compiled using permanent ink pen onto co-registered clear acetate overlays. Process_Date: 2007 Process_Step: Process_Description: Digitization of geologic map data - Digital files of the air photos were orthorectified using OrthoMapper photogrammetric software. The co-registered acetate overlays of geologic mapping were then orthorectified using the same equations applied to the air photos. Resultant orthorectified map data were then imported into ArcGIS and heads-up digitized into a personal geodatabase with validated topology. Process_Date: 2008 Process_Step: Process_Description: Revision of map data - Map data were revised in response to technical reviews by Richard Reger and Trent Hubbard. Process_Date: 201106 Process_Step: Process_Description: Metadata creation - Metadata for this map was compiled by De Anne Stevens. Process_Date: 201107 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: This is a vector data set that includes point, line, and polygon features. Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -147.00000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: NEF_border Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -147.00000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: NEF_cirques Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -147.00000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: NEF_geology Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -147.00000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: NEF_photolinears Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 6 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -147.00000 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: NEF_pingos Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.9786982 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: NEF_border Entity_Type_Label: NEF_border.shp Entity_Type_Definition: Polygon of boundary outline of the mapped area. Entity_Type_Definition_Source: This report. Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: NEF_cirques Entity_Type_Label: NEF_cirques.shp Entity_Type_Definition: Polylines showing headwalls of possible cirques. Entity_Type_Definition_Source: This report. Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: NEF_geology Entity_Type_Label: NEF_geology.shp Entity_Type_Definition: Polygons of surficial-geologic map units. Entity_Type_Definition_Source: This report. Attribute: Attribute_Label: unit Attribute_Definition: Geologic unit. Attribute_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: b Enumerated_Domain_Value_Definition: EXPOSED BEDROCK Undifferentiated bedrock with essentially no cover Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: b' Enumerated_Domain_Value_Definition: THINLY COVERED BEDROCK Undifferentiated bedrock that is covered by a thin (generally less than 1 m thick) veneer of colluvium, drift, undifferentiated glacial or glaciofluvial deposits, or combinations of these deposits; cover is sufficiently thin that planar bedrock structures, such as joints, foliation, and bedding or glacier-scoured bedrock subcrops are reflected at the ground surface by linear and curvilinear shallow troughs and bands of moist ground or hydrophilic vegetation Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qa Enumerated_Domain_Value_Definition: ALLUVIUM, UNDIFFERENTIATED Elongate deposits of moderately to well-sorted, well-stratified, fluvial pebblecobble gravel, sand, and silt, with scattered to numerous boulders comprising channel and overbank deposits of generally small streams; medium to thick bedded, locally crossbedded, shows fining-upward cycles, and is locally auriferous; clasts generally rounded; extensive willowalder thickets grow on many Qa deposits in mature valley fills; unfrozen to discontinuously frozen with low to moderate ice contents; surface smooth to hummocky, except for local low scarps Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qaa Enumerated_Domain_Value_Definition: ALLUVIUM IN ACTIVE CHANNELS Chiefly well-sorted and well-stratified layers and lenses of pebble gravel, sand, and silt with rare to scattered cobbles comprising river bars subject to recurrent inundation by modern streams every 5 yr or less (Chapin and others, 2006); mapped extent is a function of river level (stage) and reflects the transitory extent of exposed river bars at the time the photographs were taken; in braided and anastomosing reaches, active channels typically shift positions from year to year and present channel locations may differ from locations on the 1979 and 1981 photography; active channel alluvium underlies upper stream bank and active stream channels and includes point-bar and meander-scroll deposits; composed dominantly of gravel and sand where stream is braided and anastomosing, and sand and silt bars where meandering; prone to liquefaction where fine grained, unfrozen and saturated; where braided, subject to formation of extensive, thick, seasonal stream icings (aufeis); generally unfrozen, except seasonally frozen to depth of frost penetration; shallow water table Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qaf Enumerated_Domain_Value_Definition: ALLUVIAL FAN DEPOSITS Fan-shaped deposits of poorly to moderately sorted gravel, sand, and silt with numerous cobbles and boulders in proximal zone deposited by streams where they emerge from mountain valleys onto lower-gradient surfaces; lithologies reflect bedrock of source area; in general, size of clasts decreases and degree of sorting increases downfan; typically mixed with debris-flow deposits in proximal part of fans; unfrozen to discontinuously frozen, except in fine-grained distal deposits, where permafrost may be shallow and continuous; ice contents low to moderate Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qai Enumerated_Domain_Value_Definition: ALLUVIUM IN INACTIVE CHANNELS Elongate deposits of moderately to well-sorted, well-stratified, fluvial gravel, sand, and silt with scattered to numerous boulders forming modern floodplains and associated low terraces that are subject to flooding at least once or twice every century (Mason and Begét, 1991; Chapin and others, 2006); medium to thick bedded, locally crossbedded, shows fining-upward cycles, and may be locally auriferous; clasts generally rounded; may be covered by several meters of overbank silty sand and sandy gravel; may reflect former channels and flow regimes; may include more than one channel level; overbank sequences include flood-related features, like natural levees, crevasse-splays near channels, and fine-grained back-levee swale deposits farther from channels; lower surfaces may be flooded during periods of extremely high stream discharge; generally unfrozen in younger areas and discontinuously frozen in older areas with low to moderate ice contents; surface typically well vegetated, smooth to hummocky with local low scarps and bogs Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qat Enumerated_Domain_Value_Definition: TERRACE ALLUVIUM, UNDIFFERENTIATED Elongate deposits of well-sorted, well-rounded to subrounded pebblecobble gravel and sand with trace to some silt and rare to numerous boulders forming stream terrace treads no longer subject to inundations by the stream that deposited the alluvium (Kreig and Reger, 1982); may include several levels and incorporate outwash alluvium; may be covered by several meters of organic sandy silt and silty sand; surface smooth, except for local low scarps; continuously to discontinuously frozen with low to moderate ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qat4 Enumerated_Domain_Value_Definition: TERRACE ALLUVIUM OF YOUNGEST AGE Elongate deposits of well-sorted, well-rounded to subrounded pebblecobble gravel and sand with trace to some silt and rare to numerous boulders forming stream terrace treads no longer subject to inundations by the stream that deposited the alluvium (Kreig and Reger, 1982); may include several levels; may be covered by up to a meter of organic sandy silt and silty sand; upper surface typically only a few meters above modern stream level; surface smooth, except for local low scarps; continuously to discontinuously frozen with low to moderate ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qat3 Enumerated_Domain_Value_Definition: TERRACE ALLUVIUM OF YOUNG-INTERMEDIATE AGE Elongate deposits of well-sorted, well-rounded to subrounded pebblecobble gravel and sand with trace to some silt and rare to numerous boulders forming stream terrace treads no longer subject to inundations by the stream that deposited the alluvium (Kreig and Reger, 1982); may include several levels; may be covered by several meters of organic sandy silt and silty sand; upper surface about 30-50 m above modern stream level along upper Chatanika River and lower Sourdough Creek; surface smooth, except for local low scarps; continuously to discontinuously frozen with low to moderate ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qat2 Enumerated_Domain_Value_Definition: TERRACE ALLUVIUM OF INTERMEDIATE AGE Elongate deposits of well-sorted, well-rounded to subrounded pebblecobble gravel and sand with trace to some silt and rare to numerous boulders forming stream terrace treads no longer subject to inundations by the stream that deposited the alluvium (Kreig and Reger, 1982); includes several levels; distribution and elevation of deposits suggest unit may incorporate outwash alluvium of Little Champion or Prindle glaciations, or both, of Weber and Hamilton (1987); largest measured cobbles up to 54 cm diameter; upper surfaces of some granite cobbles strongly weathered and decomposed, while undersides remain sound; may be covered by several meters of organic sandy silt and silty sand; upper surface about 90 m above modern stream level along upper Chatanika River and lower Sourdough Creek; surface smooth, except for local low scarps; continuously to discontinuously frozen with low to moderate ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qat1 Enumerated_Domain_Value_Definition: TERRACE ALLUVIUM OF OLDEST AGE Elongate deposits of well-sorted, well-rounded to subrounded pebblecobble gravel and sand with trace to some silt and rare to numerous boulders forming stream terrace treads no longer subject to inundations by the stream that deposited the alluvium (Kreig and Reger, 1982); includes several levels; distribution and elevation of deposits suggest unit probably incorporates outwash alluvium of Prindle glaciation or older of Weber and Hamilton (1987); commonly preserved as a thin veneer or gravel lag; upper surfaces of some granite cobbles strongly weathered and decomposed, while undersides remain sound; may be covered by several meters of organic sandy silt and silty sand; upper surface about 90-120 m above modern stream level along Faith Creek and about 180 m above modern stream level along upper Chatanika River; surface smooth, except for local low scarps; continuously to discontinuously frozen with low to moderate ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qat1? Enumerated_Domain_Value_Definition: POSSIBLE TERRACE ALLUVIUM OF OLDEST AGE Possible upstream continuation of unit Qat1 into upper reaches of Faith Creek and upslope of unit Qat2 along the Chatanika River at the mouth s of Faith and Sourdough creeks; mapped primarily on the basis of subtle slope breaks and smooth surface morphology along valley walls; upper surface about 120-180 m above modern stream level along upper Chatanika River and 90-120 m above modern stream level along Faith Creek Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qc Enumerated_Domain_Value_Definition: COLLUVIUM, UNDIFFERENTIATED Irregular, heterogeneous blankets, aprons, and fans of angular to subrounded rock fragments, gravel, sand, and silt that are left on slopes, slope bases, or high-level surfaces by residual weathering and complex, gravity-driven mass movements involving sliding, flowing, gelifluction, and frost creep of weathered bedrock and modified glacial drift; cobbles and boulders are scattered to numerous; on lower headwalls of cirques and upper walls of glaciated valleys includes talus aprons and steep fans built by snow avalanches and debris flows; may include thin residual deposits and lags of highly modified drift of ancient glaciations, particularly in the northern part of the map area; medium to thick bedded; generally unsorted to very poorly sorted; thickness is highly variable, with thickest deposits at the bases of slopes; locally washed by meltwater and slope runoff; surface disturbances, such as from excavation, may result in melting of permafrost and subsequent slumping and flowage; surface smooth, lobed, or terraced and, if deposit is thin, generally reflects morphologies of underlying materials; discontinuously to continuously frozen with low to moderate ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qcl? Enumerated_Domain_Value_Definition: POSSIBLE LANDSLIDE DEPOSIT Unsorted, unstratified mixture of gravel, sand and silt derived from adjacent unconsolidated deposits and bedrock and deposited at the base of slope by near-surface to deep creeping, flowing, and sliding of failed bedrock and unconsolidated surficial deposits; surface slightly irregular to hummocky Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qcf Enumerated_Domain_Value_Definition: MIXED COLLUVIUM AND ALLUVIUM Primarily fan-shaped or elongate, massive to poorly stratified, generally inorganic silt mixed with sandy angular to subangular pebble gravels derived from weathered bedrock uplands and deposited by debris flows and hyperconcentrated flows produced during brief, intense summer storms; colluvial processes dominate slightly over fluvial processes; contains numerous cobbles in glaciated terrain and angular to subangular, fresh to weathered rock fragments in weathered bedrock terrain; surface slightly irregular; discontinuously to continuously frozen with low to moderate ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qct Enumerated_Domain_Value_Definition: TALUS DEPOSITS Fans and aprons of coarse, angular, unsorted, frost-rived rock fragments downslope of bedrock outcrops with trace to some gravel, sand, and silt deposited on steep bedrock slopes by rock falls, snow avalanches, free fall, tumbling, rolling, and sliding; surface steep, slightly irregular, and covered with numerous rock fragments, particularly in distal zones; includes debris-flow tongues; unfrozen to discontinuously frozen with low ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qlc Enumerated_Domain_Value_Definition: LOWLAND COLLUVIUM Gravel, sand and silt derived from underlying or nearby bedrock and unconsolidated deposits and deposited in lowland areas adjacent to low-slope drainages primarily by mass-wasting processes; includes a component of primary and reworked eolian silt; overlies and incorporated into terrace deposits; surface smooth to gently sloping; discontinuously to continuously frozen with moderate to high ice contents Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qdlc Enumerated_Domain_Value_Definition: DRIFT OF LITTLE CHAMPION AGE Till associated with the Little Champion glaciation of Weber and Hamilton (1984); subrounded cobbles and boulders and some angular chips of schist and quartzite in a yellowish-brown matrix of silty sand (Rawlinson and Hickmott, 1987) deposited by glacial ice and reworked by meltwater streams; primary surface morphology largely obliterated due to post-depositional modification by weathering and slope processes; mapped by photo-interpretation at a single site in study area, at head of Hope Creek tributary drainage Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qdp Enumerated_Domain_Value_Definition: DRIFT OF PRINDLE AGE OR OLDER Till associated with the Prindle glaciation of Weber and Hamilton (1984) and possibly older glacial deposits; discontinuous to continuous sheets of heterogeneous pebble gravel with rare to numerous cobbles, boulders, and blocks up to 2 m in diameter in a brown matrix of sandy silt deposited directly from melting glacial ice and reworked by meltwater streams and mass-movement processes; generally thin, but locally up to 9.4 m thick; clasts generally subangular to subrounded; scattered angular pebbles; some small granite cobbles and pebbles are decomposing, but most are sound Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qdp? Enumerated_Domain_Value_Definition: Possible DRIFT OF PRINDLE AGE OR OLDER Till associated with the Prindle glaciation of Weber and Hamilton (1984) and possibly older glacial deposits; discontinuous to continuous sheets of heterogeneous pebble gravel with rare to numerous cobbles, boulders, and blocks up to 2 m in diameter in a brown matrix of sandy silt deposited directly from melting glacial ice and reworked by meltwater streams and mass-movement processes; generally thin, but locally up to 9.4 m thick; clasts generally subangular to subrounded; scattered angular pebbles; some small granite cobbles and pebbles are decomposing, but most are sound Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qh Enumerated_Domain_Value_Definition: CONSTRUCTION PAD Artificial fill of pebble-cobble gravel with trace to some sand and silt forming bases for DOT station; well to poorly sorted; surface smooth to irregular; extent based on distribution in August 1981 when the aerial photographs were taken Enumerated_Domain_Value_Definition_Source: This document. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qmt Enumerated_Domain_Value_Definition: MINE TAILINGS Water-washed pebblecobble gravel with trace to some sand and silt piled in active or formerly active gravel pits, open-pit mines, and dredged areas; typically well sorted; surface smooth to irregular or forming symmetrical ridges and cones; unfrozen Enumerated_Domain_Value_Definition_Source: This document. Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: NEF_photolinears Entity_Type_Label: NEF_photolinears.shp Entity_Type_Definition: Polylines showing photolinears. Entity_Type_Definition_Source: This report. Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: NEF_pingos Entity_Type_Label: NEF_pingos Entity_Type_Definition: Points showing locations of pingos. Entity_Type_Definition_Source: This report. Attribute: Attribute_Label: LAT Attribute_Definition: Latitude of point. Attribute_Definition_Source: This document. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 65.2 Range_Domain_Maximum: 65.3 Attribute_Units_of_Measure: degrees Attribute: Attribute_Label: LON Attribute_Definition: Longitude of point. Attribute_Definition_Source: This document. Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -146.5 Range_Domain_Maximum: -146.0 Attribute_Units_of_Measure: degrees Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 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_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. 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Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for a exact shipping amount. Metadata_Reference_Information: Metadata_Date: 20101004 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Metadata manager Contact_Address: Address_Type: mailing and physical Address: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5020 Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified this metadata file in any way, the user is obligated to describe the types of modifications the user has made. 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