Identification_Information: Citation: Citation_Information: Originator: Reger, R.D. Originator: Péwé, T.L. Publication_Date: 2002 Title: Geologic map of the Big Delta A-4 Quadrangle, Alaska Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2002-2 Publication_Information: Publication_Place: Fairbanks, Alaska - USA Publisher: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: http://dx.doi.org/10.14509/2869 Description: Abstract: This map illustrates extents and types of unconsolidated deposits and bedrock in the Big Delta A-4 Quadrangle, Alaska. This map is based on field observations begun by Péwé in 1949 and by Reger in 1976. Unit characteristics and extents were determined during field visits and by interpreting 1:40,000-scale black-and-white aerial photographs taken in August 1949 and 1:63,360-scale, false-color infrared aerial photographs taken in July 1978, August 1980, and August 1981. Purpose: This publication provides geological information on the Delta Junction and Big Delta area for resource evaluation and geological hazards. 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." Layers include: >bdgeo3_polygon bedrock geologic unit polygons >samples_point sample locations Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1976 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -146.008943 East_Bounding_Coordinate: -145.486467 North_Bounding_Coordinate: 64.254273 South_Bounding_Coordinate: 63.995698 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: Alluvium Theme_Keyword: Geology Theme_Keyword: Glaciation Theme_Keyword: Loess Theme_Keyword: Outwash Theme_Keyword: Permafrost Theme_Keyword: Radiocarbon Dating Theme_Keyword: Silt Theme_Keyword: Surficial Geology Theme_Keyword: Tephra Theme_Keyword: Till Place: Place_Keyword_Thesaurus: none Place_Keyword: Alaska Range Place_Keyword: Big Delta Place_Keyword: Big Delta Quadrangle Place_Keyword: Delta River Place_Keyword: Tanana River Stratum: Stratum_Keyword_Thesaurus: none Stratum_Keyword: Jarvis Creek Ash Temporal: Temporal_Keyword_Thesaurus: none Temporal_Keyword: Cenozoic Temporal_Keyword: Holocene Temporal_Keyword: Paleozoic Temporal_Keyword: Pleistocene Temporal_Keyword: Precambrian Temporal_Keyword: Quaternary Access_Constraints: This report, map, and/or data set 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 data sets utilizing these data sets 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 data sets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: GIS Data Manager/Cartographer Contact_Address: Address_Type: mailing and physical address Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907) 451-5029 Contact_Voice_Telephone: (907) 451-5020 Contact_Facsimile_Telephone: (907) 451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Contact_Instructions: You may view our web site at http://www.dggs.alaska.gov for the latest information on available data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change. Native_Data_Set_Environment: Microsoft Windows XP SP2, ArcGIS 9.+, and any text editor. 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: -147.000 Latitude_of_Projection_Origin: 0 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000064 Ordinate_Resolution: 0.000064 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: bdgeo3_polygon 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: -147.000 Latitude_of_Projection_Origin: 0 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000005 Ordinate_Resolution: 0.000005 Planar_Distance_Units: meters Planar_Coordinate_Layer_Name: samples_point Geodetic_Model: Horizontal_Datum_Name: D_Clarke_1866 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: bdgeo3_polygon Entity_Type_Label: bdgeo3_polygon.shp Entity_Type_Definition: Object type is vector, there are 532 rows associated with this entity, and the entity values refer to bedrock geology Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: UNIT Attribute_Definition: The name of geological units on the map as described in the "Description of Map Units" found on printed map Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qaa Enumerated_Domain_Value_Definition: ACTIVE-FLOODPLAIN ALLUVIUM—Chiefly well-sorted and well-stratified layers and lenses of silt, sand, and polymictic gravel (pebbles and cobbles) comprising river bars subject to frequent inundations by streams Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qai Enumerated_Domain_Value_Definition: INACTIVE-FLOODPLAIN ALLUVIUM—Chiefly 10 to 20 ft of overbank silty sand and sandy silt overlying gravelly, polymictic riverbed sand and sandy gravel beneath surfaces subject to stream flooding at least as often as once or twice every century (Mason and Begét, 1991); may include more than one surface; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qab Enumerated_Domain_Value_Definition: ABANDONED-FLOODPLAIN ALLUVIUM—Chiefly 10 to 20 ft of overbank sandy silt and silty sand overlying sandy, polymictic riverbed gravel beneath surfaces with widespread lowland loess and local sand dunes and subject to stream flooding about once every 500 to 1,000 years; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qao Enumerated_Domain_Value_Definition: UNDIFFERENTIATED GLACIAL AND NONGLACIAL ALLUVIUM—Primarily coarse, polymictic gravel and sand deposited by former proglacial streams of the Delta glaciation and locally covered along courses of nonglacial streams by postglacial alluvium; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qat Enumerated_Domain_Value_Definition: STREAM-TERRACE ALLUVIUM—Chiefly 4 to more than 20 ft of organic sandy silt and silty sand overlying well-sorted, polymictic sand and gravel beneath stream terrace treads no longer subject to inundations by the stream that deposited the alluvium; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qcf Enumerated_Domain_Value_Definition: MIXED COLLUVIUM AND ALLUVIAL DEPOSITS—Primarily fan-shaped, massive to poorly stratified fine material mixed with polymictic pebble and cobble gravel laid down by small, ephemeral streams draining glacial and eolian-cover deposits; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qel Enumerated_Domain_Value_Definition: LOESS—Silt with up to 15 percent very fine sand carried by winds and deposited as a blanket over the downwind topography Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qer Enumerated_Domain_Value_Definition: RETRANSPORTED LOESS AND LOWLAND SILT—Chiefly organic silt with variable amounts of sand and lenses of locally derived gravel that are deposited by slope runoff and seasonal streams draining bedrock slopes covered by upland silt; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qes Enumerated_Domain_Value_Definition: DUNE SAND—Chiefly fine eolian sand with trace amounts (2 to 16 percent) of silt; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qgdo Enumerated_Domain_Value_Definition: TILL AND ASSOCIATED MORAINAL DEPOSITS OF DELTA GLACIATION—Heterogeneous, nonstratified, polymictic pebble–cobble gravel with some sand and silt and few to numerous subangular to subrounded boulders deposited by glacial ice; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qgfo Enumerated_Domain_Value_Definition: OUTWASH OF DELTA GLACIATION Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qgfy Enumerated_Domain_Value_Definition: OUTWASH OF DONNELLY GLACIATION Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qlr Enumerated_Domain_Value_Definition: DEPOSITS OF ICE-SHOVED RAMPARTS—Chiefly well-sorted and complexly deformed polymictic pebble–cobble gravel with some medium to coarse sand pushed into a system of double 3- to 5-ft-high ridges around the northwestern margin of Quartz Lake by wind-driven; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qp Enumerated_Domain_Value_Definition: SWAMP DEPOSIT—Primarily fibrous and locally woody autochthonous peat with organic silt and sand deposited in lowland sites (Kreig and Reger, 1982); up to 8 ft thick; discontinuously to continuously frozen with moderate to high ice content; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pzs Enumerated_Domain_Value_Definition: QUARTZITE AND SCHIST—Chiefly quartzite with common quartz–mica schist and lesser feldspathic quartzite; generally garnetiferous, locally actinolitic and gneissic; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PzpCa Enumerated_Domain_Value_Definition: AUGEN GNEISS AND BIOTITE GNEISS—Chiefly medium- to coarse-grained, foliated and typically mylonitic augen gneiss with subordinate augen schist and biotite gneiss of amphibolite metamorphic facies in bedrock uplands of southern Yukon–Tanana terrane; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: PzpCg Enumerated_Domain_Value_Definition: QUARTZ–BIOTITE GNEISS—Medium-grained, well-foliated and banded to massive gneiss interbedded with quartzite in bedrock uplands of the southern Yukon–Tanana terrane; Enumerated_Domain_Value_Definition_Source: RI-2002-2, Description of Map Units Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: samples_point Entity_Type_Label: samples_point.shp Entity_Type_Definition: Object type is point, there are 3 rows associated with this entity, and the entity values refer to sample locations Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: SAMPLES# Attribute_Definition: Sample number assigned by author(s) Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Value assigned 1, 2, 3 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: Natural Resource Technician Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5020 Contact_TDD/TTY_Telephone: None available. Contact_Facsimile_Telephone: 907-451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our web site (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: Report of Investigation 2002-2 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 $13.00 (contact information below) plus shipping if mailed. 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Metadata_Reference_Information: Metadata_Date: 20080506 Metadata_Review_Date: 20080506 Metadata_Future_Review_Date: 20090308 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.