Stevens, D.S.P. 2012 map, digital data Preliminary Interpretive Report PIR 2002-1D Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/24544 The Alaska Division of Geological & Geophysical Surveys (DGGS) has conducted 1:63,360-scale geologic mapping of the Eagle A-1 Quadrangle. 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 potential near-surface sources of various geologic materials that may be useful for construction. Field observations indicate that each geologic unit (for example, stream alluvium) has a definite composition or range of composition. Therefore, the probable presence of materials is interpreted from the distribution of geologic units on the geologic map of this quadrangle. This map is generalized and is not intended to show exact locations of specific materials. Local variations are common, especially near unit boundaries. The map was derived electronically from the geologic map of the area using Geographic Information System (GIS) software. It is locally verified by ground observations during field visits. The results should be considered reconnaissance in nature. This project, resulting map, geospatial data was 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 were reconnaissance-level maps or only covered portions of the quadrangle. Mapping at 1:63,360 scale (or more detailed) was needed to identify critical geologic features that may relate to more regional structures or geologic units. The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers," group and describe files that have intrinsic logical or topological relationships. Attribute information for the layers (entity) is included in this metadata file under the "Entity_and_Attribute_Information" section. The layers are titled: >border: outline shape of the study area >contact: engineering-geologic unit outlines >materials: engineering-geologic units >photolinear: linear features visible on aerial photographs >pingo: pingo locations 2001 2002 2012 ground condition Complete None planned -141.50 -141.00 64.25 64.00 ISO 19115 Topic Category geoscientificInformation Alaska Division of Geological & Geophysical Surveys Alluvial Deposits Alluvium Colluvial Deposits Colluvium Construction Materials Crushed Gravel Crushed Rock Decorative Stone Drain Rock Engineering Engineering Geology Geologic Hazards Geologic Map Geologic Materials Ground Ice Permafrost Photogeologic Lineaments Pingos Rip Rap STATEMAP Project Sand and Gravel Thawing Permafrost Unconsolidated Deposits Alaska Division of Geological & Geophysical Surveys Boundary (Place) Fortymile Mining District Jack Wade Junction Steele Creek Dome Taylor Highway Top of the World Highway Walker Fork This report, map, and/or dataset is 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. The 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. 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. Alaska Division of Geological & Geophysical Surveys James Weakland GIS Analyst III mailing and physical

3354 College Rd

Fairbanks AK 99709-3707 USA 907-451-5029 907-451-5020 dggsgis@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays 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 No. 01HQAG0054. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcGIS 10.0.0.2414 Pinney, D.S. 2001 map Preliminary Interpretive Report PIR 2001-3D Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/2672 Pinney, D.S. 2001 map Preliminary Interpretive Report PIR 2001-3C Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/2671 Stevens, D.S.P. Burns, P.A.C. 2010 map Preliminary Interpretive Report PIR 2002-1C Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/22081 Szumigala, D.J. Newberry, R.J. Werdon, M.B. Athey, J.E. Flynn, R.L. Clautice, K.H. 2002 map Preliminary Interpretive Report PIR 2002-1B Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/2864 Szumigala, D.J. Newberry, R.J. Werdon, M.B. Athey, J.E. Stevens, D.S.P. Flynn, R.L. Clautice, K.H. Craw, P.A. 2002 map Preliminary Interpretive Report PIR 2002-1A Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/2863 Szumigala, D.J. Newberry, R.J. Werdon, M.B. Finseth, B.A. Pinney, D.S. 2000 map Preliminary Interpretive Report PIR 2000-6 Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/2734 Werdon, M.B. Newberry, R.J. Szumigala, D.J. Pinney, D.S. 2001 map Preliminary Interpretive Report PIR 2001-3A Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/2669 Werdon, M.B. Newberry, R.J. Szumigala, D.J. 2001 map Preliminary Interpretive Report PIR 2001-3B Fairbanks, AK, USA Alaska Division of Geological & Geophysical Surveys 1 sheet, scale 1:63,360 http://www.dggs.alaska.gov/pubs/id/2670 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, investigative traverses throughout the map area, aerial reconnaissance via helicopter, and examination of road-cuts and river exposures. Engineering-geologic map units were derived from the surficial-geologic map (PIR 2002-3C). Physical properties of engineering-geologic map units are interpretive, based on extrapolation from verified localities and from previously published reports and data. This map has received two technical reviews by scientists familiar with the subject matter. We incorporated the reviewer's suggestions into the final draft. Polygon topology was present and clean on the original Arc GIS coverages. All polygon features were topologically validated using ArcGIS prior to export to shapefile format. This dataset includes shapefiles that contain information about the mapped and interpreted engineering-geologic deposits in the map area distinguishable at a scale of 1:63,360. No analytical tests were conducted for this report. The table describes engineering properties that are generally present in the mapped surficial deposits, but local variations and exceptions are most certainly to be expected. The reader is therefore cautioned that this map is intended only as a general guide, and that unevaluated geologic resources and hazards may be present. Detailed geotechnical investigations should be conducted prior to utilization of any map units for engineering purposes. Surficial mappers recorded observations on 1:65,000-scale (nominal) color-infrared aerial photographs and 1:63,360 scale topographic base maps. We believe the total horizontal accuracy of the mapped surficial-geologic contacts is on the order of 25 m or better, with somewhat lesser accuracy expected in areas of rugged relief. Wagner, A.A. 1957 conference proceedings Proceedings, 4th International Conference on Soil Mechanics and Foundation Engineering vol. I, p. 125. London, England International Conference on Soil Mechanics and Foundation Engineering paper 1957 publication date Wagner, A.A., 1957 Soil Classification System Engineering map compilation- Data from the comprehensive geologic map of the area (Szumigala, D.J., Newberry, R.J., Werdon, M.B., Athey, J.E., Stevens, D.S.P., Flynn, R.L., Clautice, K.H., and Craw, P.A., 2002, Geologic map of the Eagle A-1 Quadrangle, Fortymile mining district: Alaska Division of Geological & Geophysical Surveys Preliminary Interpretive Report 2002-1A, 1 sheet, scale 1:63,360.) were used as the basis for generating the derivative engineering-geologic map. An ArcInfo lookup table was made to assign geologic units (item UNIT) from the comprehensive map to appropriate engineering-geologic units (item MAT) based on the Unified Soil Classification System as described by Wagner, A.A., 1957. This lookup table was applied to the ArcInfo polygon coverage containing the geologic units and a new engineering-geologic polygon coverage was generated using the "dissolve" command based on the new materials-unit item "MAT". ArcPlot was used to generate plot files of the resulting materials coverage using DGGS-standard symbology, and the Arc graphics files were converted into .eps files for export to Adobe Illustrator for final cartographic assembly. Wagner, A.A., 1957 2001 The layout for the printed map was finished in 2012. At the time of publication, DGGS staff converted the originating ArcInfo coverages to shapefiles, compiled FGDC compliant metadata documentation, and assembled the shapefiles into an online data distribution package. 2012 Vector Universal Transverse Mercator 7 0.999600 -141 0 500000.000000 0 coordinate pair 0.000001 0.000001 meters border Universal Transverse Mercator 7 0.999600 -141 0 500000.000000 0 coordinate pair 0.000001 0.000001 meters contact Universal Transverse Mercator 7 0.999600 -141 0 500000.000000 0 coordinate pair 0.000001 0.000001 meters materials Universal Transverse Mercator 7 0.999600 -141 0 500000.000000 0 coordinate pair 0.000001 0.000001 meters photolinear Universal Transverse Mercator 7 0.999600 -141 0 500000.000000 0 coordinate pair 0.000001 0.000001 meters pingo North American Datum of 1927 North American Datum of 1927 6378206.4 294.9786982 border pir2002-1d-border outline shape of the study area Alaska Division of Geological & Geophysical Surveys contact pir2002-1d-contact engineering-geologic unit outlines Alaska Division of Geological & Geophysical Surveys type type of feature Alaska Division of Geological & Geophysical Surveys approximately located approximately located unit contact Alaska Division of Geological & Geophysical Surveys materials pir2002-1d-materials engineering-geologic units Alaska Division of Geological & Geophysical Surveys MAT engineering-geologic unit type Alaska Division of Geological & Geophysical Surveys BC Medium-jointed, fine- to coarse-grained sedimentary carbonate rocks and their metamorphic equivalents. Includes limestone and marble. Alaska Division of Geological & Geophysical Surveys BG Coarse-jointed, coarse-grained igneous lithologies and their metamorphic equivalents. Chiefly granitic rocks. Includes coarse-grained gneiss. Alaska Division of Geological & Geophysical Surveys BM Medium-jointed, fine- to medium-grained quartzose sedimentary rocks and their metamorphic equivalents. Chiefly quartzite in this map area. Alaska Division of Geological & Geophysical Surveys BO Rocks of lithologies that are (a) not listed in other materials classes, but which may be suited for use as construction materials or for other specialized purposes, and (b) mixed units composed of combinations of the above bedrock materials classes. Includes fine-grained gneiss and phyllite. Alaska Division of Geological & Geophysical Surveys BS Fine- to coarse-grained mafic plutonic rocks and their metamorphic equivalents. Includes metagabbro and serpentinite. Alaska Division of Geological & Geophysical Surveys BU Rocks of mixed lithology and/or very fine-grained sedimentary lithologies that are generally poorly suited for use as construction materials. Includes coal-bearing Tertiary sediments. Alaska Division of Geological & Geophysical Surveys BV Medium-jointed, fine-grained igneous rocks and their metamorphic equivalents. Chiefly metavolcanics and dikes. Alaska Division of Geological & Geophysical Surveys GM Poorly- to moderately well-sorted clay, silt, sand, gravel, and diamicton of colluvial, fluvial, and glacial origins. Includes angular, unsorted talus debris and chaotically deformed colluvium derived from landslides. Engineering applications vary widely due to large range of grain size and sorting properties. Commonly frozen. Estimated 20 to 80 percent coarse, granular deposits with considerable oversized material. Includes primarily GC and GM of the Unified Soil Classification System (Wagner, 1957). Alaska Division of Geological & Geophysical Surveys GS Fluvial and glaciofluvial gravel, sand, and silt. Chiefly (estimated >80 percent) clean sand and gravel. Grain size, sorting, and degree of stratification are variable. Permafrost may be present, especially in older deposits. Older deposits may contain highly weathered clasts and thus may not be suitable as construction materials. Rare oversized materials may include boulders. Includes primarily GP and GW of the Unified Soil Classification System (Wagner, 1957). Alaska Division of Geological & Geophysical Surveys OR Organic-rich silt and peat in bogs, former stream channels, and lake basins. Commonly frozen and ice-rich due to the excellent insulating properties of peat. Generally water-saturated. Chiefly organic materials. Estimated >50 percent peat, organic sand, or organic silt. Includes Pt of the Unified Soil Classification System (Wagner, 1957). Alaska Division of Geological & Geophysical Surveys SM Silt deposited primarily by wind and reworked by fluvial and colluvial processes. May be organic rich. Commonly frozen and ice-rich, especially on north-facing slopes. Chiefly fine materials. Estimated >80 percent silt, sand, and clay. Includes primarily ML, MH, and SM of the Unified Soil Classification System (Wagner, 1957). Alaska Division of Geological & Geophysical Surveys photolinear pir2002-1d-photolinear linear features visible on aerial photographs Alaska Division of Geological & Geophysical Surveys type type of feature Alaska Division of Geological & Geophysical Surveys photolinear feature linear feature visible on aerial photographs Alaska Division of Geological & Geophysical Surveys pingo pir2002-1d-pingo pingo locations Alaska Division of Geological & Geophysical Surveys type type of feature Alaska Division of Geological & Geophysical Surveys pingo pingo location Alaska Division of Geological & Geophysical Surveys State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys mailing and physical

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5020 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. PIR 2002-1D 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 requestor or anyone else exceed the fee paid for the electronic service or product. DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. 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. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. see http://www.dggs.alaska.gov/pubs/id/24544 vector digital data http://www.dggs.alaska.gov/pubs/id/24544 Free download 20121105 Metadata manager mailing and physical

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5020 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 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. User specifically agrees not to misrepresent this metadata file, 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. http://www.dggs.alaska.gov/metadata/dggs.ext dggs metadata extensions