Reger, R.D. Péwé, T.L. 2002 vector digital data Report of Investigation RI 2002-2 Fairbanks, Alaska - USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2869 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. This publication provides geological information on the Delta Junction and Big Delta area for resource evaluation and geological hazards. 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 1976 ground condition Complete None planned -146.008943 -145.486467 64.254273 63.995698 ISO 19115 Topic Category geoscientificInformation none Alluvium Geology Glaciation Loess Outwash Permafrost Radiocarbon Dating Silt Surficial Geology Tephra Till none Alaska Range Big Delta Big Delta Quadrangle Delta River Tanana River none Jarvis Creek Ash none Cenozoic Holocene Paleozoic Pleistocene Precambrian Quaternary 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). 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. State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys GIS Data Manager/Cartographer mailing and physical address

3354 College Road

Fairbanks AK 99709-3707 USA (907) 451-5029 (907) 451-5020 (907) 451-5050 dggspubs@alaska.gov 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. Microsoft Windows XP SP2, ArcGIS 9.+, and any text editor. Universal Transverse Mercator 6 0.999600 -147.000 0 500000 0 coordinate pair 0.000064 0.000064 meters bdgeo3_polygon Universal Transverse Mercator 6 0.999600 -147.000 0 500000 0 coordinate pair 0.000005 0.000005 meters samples_point D_Clarke_1866 Clarke 1866 6378206.4 294.978698 bdgeo3_polygon.shp Object type is vector, there are 532 rows associated with this entity, and the entity values refer to bedrock geology Alaska Division of Geological & Geophysical Surveys bdgeo3_polygon UNIT The name of geological units on the map as described in the "Description of Map Units" found on printed map Alaska Division of Geological & Geophysical Surveys Qaa 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 RI-2002-2, Description of Map Units Qai 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; RI-2002-2, Description of Map Units Qab 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; RI-2002-2, Description of Map Units Qao 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; RI-2002-2, Description of Map Units Qat 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; RI-2002-2, Description of Map Units Qcf 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; RI-2002-2, Description of Map Units Qel LOESS—Silt with up to 15 percent very fine sand carried by winds and deposited as a blanket over the downwind topography RI-2002-2, Description of Map Units Qer 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; RI-2002-2, Description of Map Units Qes DUNE SAND—Chiefly fine eolian sand with trace amounts (2 to 16 percent) of silt; RI-2002-2, Description of Map Units Qgdo 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; RI-2002-2, Description of Map Units Qgfo OUTWASH OF DELTA GLACIATION RI-2002-2, Description of Map Units Qgfy OUTWASH OF DONNELLY GLACIATION RI-2002-2, Description of Map Units Qlr 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; RI-2002-2, Description of Map Units Qp 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; RI-2002-2, Description of Map Units Pzs QUARTZITE AND SCHIST—Chiefly quartzite with common quartz–mica schist and lesser feldspathic quartzite; generally garnetiferous, locally actinolitic and gneissic; RI-2002-2, Description of Map Units PzpCa 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; RI-2002-2, Description of Map Units PzpCg QUARTZ–BIOTITE GNEISS—Medium-grained, well-foliated and banded to massive gneiss interbedded with quartzite in bedrock uplands of the southern Yukon–Tanana terrane; RI-2002-2, Description of Map Units samples_point.shp Object type is point, there are 3 rows associated with this entity, and the entity values refer to sample locations Alaska Division of Geological & Geophysical Surveys samples_point SAMPLES# Sample number assigned by author(s) Alaska Division of Geological & Geophysical Surveys Value assigned 1, 2, 3 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Natural Resource Technician mailing and physical

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5020 None available. 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays 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. Report of Investigation 2002-2 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. 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. Printed publication can be purchased for $13.00 (contact information below) plus shipping if mailed. PDF 1.6 No compression applied http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2869 ArcGIS Shapefile ESRI ArcGIS 9.x No compression applied http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2869 CD-ROM Joliet Digital files on CD-ROM are available for $10.00 (contact information below). No fees charged for downloaded files. 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. 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. Please check the MapInfo web site (http://www.mapinfo.com/) for the latest documentation on importing ESRI shape files. 20080506 20080506 20090308 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Metadata Manager mailing and physical address

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5039 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays. Please contact us through the e-mail address above whenever possible. FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 none 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.