Pinney, D.S. 200105 map and vector digital data Preliminary Interpretive Report PIR 2001-3C Fairbanks, AK, USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS) 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2671 The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-2 Quadrangle (270 square miles; equivalent to four 7.5-minute quadrangles). The area is part of the 100-year old Fortymile mining district and is located in eastern Alaska near the Alaska-Yukon border. This map illustrates the distribution of a variety of unconsolidated deposits and undifferentiated bedrock in the Eagle A-2 Quadrangle, Fortymile mining district. It was prepared by the interpretation of 1:63,360-scale, false-color, infrared aerial photographs taken from July 1978 through August 1981 and is locally verified by ground observations during field visits. The results should be considered reconnaissance in nature. The dominant unconsolidated deposit is colluvium, which mantles most surfaces other than the tops of ridges and those areas immediately adjacent to streams. Three levels of stream terrace can be traced along major drainages at elevations of roughly 200, 100, and 30 meters above modern streams. A fourth low terrace is limited to the southwest part of the map area. Pleistocene mammalian remains have been recovered from ice-rich organic silt and muck overlying placer gravels in many valleys. This project, resulting map, geospatial data are intended to provide a geologic map and a geologic interpretation of the Fortymile mining district at 1:63,360 scale. Previous published 1:63,360 scale geologic maps of this area have been reconnaissance-level maps or only covered portions of the quadrangle. Mapping at 1:63,360 scale (or more detailed) is needed to identify critical geologic features that may relate to more regional structures or geologic units. These detailed observations are also critical to test or use in tectonic models. This map also provides a geologic base in which to interpret geochemical results from the concurrent DGGS rock sampling program. The layers listed below are present as ArcGIS shape files. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribute_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Basic unit information is also included in the unit code set file "PIR2001-3_codeset.pdf." Layers include: >fmpingos pingo locations >fmsurfgeo2 surficial geologic units 1999 2001 publication date Complete none planned -142.00902346 -141.49552824 64.25256429 63.9974188 ISO 19115 Topic Category geoscientificInformation none Geology Mining STATEMAP Project Surficial Geology Terrace none Alaska, State of Fortymile Mining District Eagle Quadrangle Chicken none Holocene Pleistocene Quaternary Tertiary Cenozoic 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). 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. State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys GIS Data Manager/Cartographer mailing and physical

3354 College Road

Fairbanks AK 99709-3707 (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. This project is part of the Alaska Airborne Geophysical/Geological Mineral Inventory Program funded by the Alaska State Legislature and managed by State of Alaska, Department of Natural Resources (DNR), Division of Geological & Geophysical Surveys (DGGS). Partial funding for the geologic mapping was also provided by the U.S. Geological Survey, National Cooperative Geologic Mapping Program, under STATEMAP award number 00HQAG0071 under the NCGM STATEMAP program for FY2000. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. government. Microsoft Windows XP SP2, ArcGIS 9.+, and any text editor. Werdon, M.B. Newberry, R.J. Szumigala, D.J. Pinney, D.S. 200105 map, vector digital data Preliminary Interpretive Report PIR 2001-3A Fairbanks, AK, USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS) 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2669 Werdon, M.B. Newberry, R.J. Szumigala, D.J. 200105 Preliminary Interpretive Report PIR 2001-3B Fairbanks, AK 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=2670 Pinney, D.S. 200105 Preliminary Interpretive Report PIR 2001-3D Fairbanks, AK 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=2672 Warren Yeend 1996 map, document U.S. Geological Survey Bulletin 2125 Washington D.C., Maryland United States Government Printing Office 74 p., 1 sheet This compilation for the surficial geologic information was done on a one-to-one scale, paper map of the USGS topographic base for each of the 1:63,360 scale USGS topographic bases included in the map area. Geologic data included in the compilation are the field maps and notes from this project as well as photo interpretation of 1:50,000 (nominal) scale color-infrared aerial photographs and data from other sources as noted in the "Sources Cited" section. Polygon topology present. Polygon topology present on appropriate data; others are line, point, or annotation data and do not require topologic relationships. This data set includes geospatial data about geologic units, age and pingo locations. Surficial mappers recorded observations on 1:50,000 scale (nominal) color-infrared aerial photographs and 1:63,360 scale topographic base maps. 15 Stations located using air photos and hand held GPS devices with location precision varying from +/-3 to 15 meters. 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 not in effect during this project's 2000 and 2001 field work. Naeser, N.D. Westgate, J.A. Hughes, O.L. Pewe, T.L. 1982 report Canadian Journal of Earth Sciences Vol. 19 Canada Canadian Journal of Earth Sciences p. 2167-2178 paper 1982 publication date Naeser and others, 1982 See this publication cited in the Process Step section below Warren Yeend 1996 map, document U.S. Geological Survey Bulletin 2125 Washington D.C., Maryland United States Government Printing Office 74 p., 1 sheet paper 1996 publication date Yeend, 1996 See this publication cited in the Process Step section below Werdon, M.B. Newberry, R.J. Szumigala, D.J. 2001 map Preliminary Interpretive Report PIR 2001-3A Fairbanks, AK State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 1 sheet http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2669 paper, online, CD-ROM 1999 publication date Werdon and others, 2001 See this publication cited in the Process Step section below Fieldwork- Fieldwork for surficial investigations, including traverses, road cut investigations, and river exposures, was conducted for 50 person-days during the months of June through August in 1999 and 2000. Field notes and sediment samples were collected throughout the quadrangle for surficial investigations. Surficial mapping involved using Yeend (1996) on a regular basis for checking placer geology and general units. Surficial mappers recorded observations on 1:50,000 scale (nominal) color-infrared aerial photographs and 1:63,360 scale topographic base maps. Stations located using air photos and hand held GPS devices with location precision varying from +/-3 to 15 meters. Yeend, 1996 2000 Laboratory data compilation- Laboratory analyses were performed on radiocarbon samples and gold-bearing gravel samples from June 1999 intermittently through April 2001. Unanalyzed radiocarbon and tephra samples are currently stored at the DGGS office in Fairbanks. Final storage for most samples generated by this study will be at the DGGS Geologic Material Center (GMC) in Eagle River, Alaska. 2000 Geologic map compilation- Surficial geologic map was compiled using field notes from fieldwork process step (above), analytical results from laboratory data compilation process step (above), and all known geologic data from previous work in quadrangle. The main sources of existing data include Yeend (1996), Naeser and others (1982), and Werdon and others (2001). Geologic map contacts were delineated by photo interpretation of 1:50,000-scale color-infrared aerial photographs onto clear acetate overlays. The contacts were transferred from the overlays onto paper USGS 1:63,360 topographic base maps using a zoom transfer scope, and the contacts were then digitized using ArcEdit. Line work was edited using ArcEdit, and polygon topology generated and unit designations assigned using ArcInfo and ArcEdit. ArcPlot was used to generate plot files using DGGS-standard symbology, and the Arc graphics files were converted into .eps files for export to Adobe Illustrator for final cartographic assembly. Naeser and others, 1982 Werdon and others, 2001 Yeend, 1996 2000 Universal Transverse Mercator 7 0.999600 -141.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000205 0.000205 Meters fmsurfgeo2 Universal Transverse Mercator 7 0.999600 -141.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000032 0.000032 Meters fmpingos D_Clarke_1866 Clarke 1866 6,378,206.400000 294.978698 fmsurfgeo2.shp Object type is vector, there are 1013 rows associated with this entity, and the entity values refer to surficial geologic units Alaska Division of Geological & Geophysical Surveys fmsurfgeo2 TEMP This meaning of this attribute is unknown. Alaska Division of Geological & Geophysical Surveys The description is not from any specific domain UNIT surficial geologic unit labels, any unit ending with a "?" indicates uncertainty Alaska Division of Geological & Geophysical Surveys lake polygons defining a lake Alaska Division of Geological & Geophysical Surveys PIR2001-3_codeset.pdf Alaska Division of Geological & Geophysical Surveys SUNIT surficial geologic unit labels, any unit ending with a "?" indicates uncertainty Alaska Division of Geological & Geophysical Surveys lake polygons defining a lake Alaska Division of Geological & Geophysical Surveys PIR2001-3_codeset.pdf Alaska Division of Geological & Geophysical Surveys SURFBED what portions of contacts are under surficial cover as opposed to exposed bedrock Alaska Division of Geological & Geophysical Surveys S surficial deposit Alaska Division of Geological & Geophysical Surveys B bedrock deposit Alaska Division of Geological & Geophysical Surveys JUSTBED quaternary and generalized bedrock unit labels Alaska Division of Geological & Geophysical Surveys BX bedrock Alaska Division of Geological & Geophysical Surveys PIR2001-3_codeset.pdf Alaska Division of Geological & Geophysical Surveys fmpingos.shp Object type is point, there are 2 rows associated with this entity, and the entity values refer to pingo locations Alaska Division of Geological & Geophysical Surveys fmpingos TEMP attribute describing the object pingo Alaska Division of Geological & Geophysical Surveys The description is not from any specific domain UNIT attribute describing the object pingo Alaska Division of Geological & Geophysical Surveys The description is not from any specific domain SUNIT attribute describing the object pingo Alaska Division of Geological & Geophysical Surveys The description is not from any specific domain SURFBED what portions of contacts are under surficial cover as opposed to exposed bedrock Alaska Division of Geological & Geophysical Surveys S Fluvial and glaciofluvial gravel, sand, and silt. Chiefly (estimated >80 percent) clean sand and gravel. Grain size, sorting and degree of stratification are variable. Alaska Division of Geological & Geophysical Surveys 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. Preliminary Interpretive Report 2001-3C 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=2671 ArcGIS Shapefile ESRI ArcGIS 9.x No compression applied http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2671 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 20090105 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.