Pinney, D.S. 2001 report, map, vector digital data Report of Investigation RI 2001-1C Fairbanks, Alaska - USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 3 p., 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=3313 This map is the result of field investigations by DGGS in 1997 and 1998. This geologic map and report supersede the previously released Public Data File 99-24C, Preliminary surficial-geologic map of the Healy A-6 Quadrangle, southcentral Alaska. The current map has been updated to include mapping of areas adjacent to the Healy A-6 Quadrangle. Field investigations were part of a two-year mapping program to provide geologic ground truth for airborne geophysical surveys flown by DGGS in the Chulitna region of southcentral Alaska during 1996. The purpose of this project was to produce a 1:63,360-scale geologic map for the airborne geophysical surveys released by DGGS in the Chulitna region during 1996. The geologic data are important for identifying potential mineral deposits and for characterizing and distinguishing between geologic units. 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 "RI2001-1_codeset.pdf." Layers include: >chu_allsrfgeo_arc surficial geologic unit boundaries (arc) >chu_allsrfgeo_polygon surficial geologic units (polygon) >chu_eskers_arc vector lines for eskers >chu_terrace_arc vector lines for terraces 1997 2001 publication date Complete None planned -150.030246 -149.090702 63.307690 62.958985 63.25 -150.00 63.25 -149.50 63.22 -149.50 63.22 -149.37 63.30 -149.37 63.30 -149.17 63.26 -149.11 63.25 -149.11 63.01 -149.50 63.00 -149.50 63.00 -149.51 62.97 -149.56 62.97 -149.92 63.00 -150.00 63.01 -150.00 63.02 -150.03 63.10 -150.03 63.12 -150.00 63.25 -150.00 ISO 19115 Topic Category geoscientificInformation none Geology Glacial Deposits Mining STATEMAP Project Surficial Geology Unconsolidated Deposits None Alaska, State of Chulitna Healy Quadrangle Southcentral Alaska None Elmendorf Stade Naptowne Glaciation Riley Creek Glaciation None Cenozoic Quaternary Holocene 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. The Chulitna project is part of DGGS's Airborne Geophysical and Geological Mineral Inventory project (AGGMI), a special multi-year investment by the State of Alaska to produce framework geologic maps that will expand the knowledge base of Alaska's geologic and mineral resources, catalyze future private-sector mineral exploration and development, and guide government agencies' planning projects. The AGGMI project is 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 Chulitna project was also provided by the U.S. Geological Survey under U.S. Department of the Interior, U.S. Geological Survey, National Cooperative Geological Survey STATEMAP Cooperative Agreement 98HQAG2083. 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. Gage, B.G. Liss, S.A. Clautice, K.H. 199810 Map and report Public Data File PDF 1998-36 Fairbanks, Alaska State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 48 p., 2 sheets, scale 1:63,360, 1 disk http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1862 Blodgett, R.B. Clautice, K.H. 2000 Map and report Report of Investigation RI 2000-5 Fairbanks, Alaska State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 42 p., 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2680 Clautice, K.H. Newberry, R.J. Blodgett, R.B. Bundtzen, T.K. Gage, B.G. Harris, E.E. Liss, S.A. Miller, M.L. Reifenstuhl, R.R. Clough, J.G. Pinney, D.S. 2001 report, tabular digital data, map, vector digital data Report of Investigation RI 2001-1A Fairbanks, Alaska - USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 31 p., 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2768 Clautice, K.H. Newberry, R.J. Pinney, D.S. Blodgett, R.B. Bundtzen, T.K. Gage, B.G. Harris, E.E. Liss, S.A. Miller, M.L. Reifenstuhl, R.R. Clough, J.G. 2001 Report of Investigation RI 2001-1B Fairbanks, AK State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 32 p., 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=2771 Pinney, D.S. 2001 Report of Investigation RI 2001-1D Fairbanks, AK State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 5 p., 1 sheet, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=3314 Burns, L.E. Dighem WGM Mining and Geological Consultants 1997 tabular digital data, raster digital data, vector digital data Public Data File PDF 97-5 Fairbanks, AK, USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 1 CD-ROM http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1747 Pritchard, R.A. Dighem 1997 map Public Data File PDF 97-8 Fairbanks, AK, USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 293 p., 2 sheets, scale 1:63,360 http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1750 Burns, L.E. 1997 atlas Public Data File PDF 97-7 Fairbanks, AK, USA State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 13 p., 1 sheet http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=1749 Geologic point, line, and polygon data were determined in the field using 1:63,360-scale topographic maps and 1:50,000 (nominal) scale, color-infrared aerial photographs. The surficial-geologic information was transferred from acetate air-photo overlays to a paper 1:63,360-scale USGS topographic base using a zoom transfer scope. The surficial-geologic information was then digitized into Arc/Info GIS (ArcEdit module) using a large-format digitizing table with RMS registration errors constrained to be no larger than 0.003 inches (input coverage units) for each digitizing session. Geologic data included in the compilation are the field maps and notes from this project as well as data from other sources as noted in the "Sources Cited" section. Polygon topology present and clean on appropriate data; others are line or point data. This dataset includes geospatial information about geologic units and land forms. Location data were determined visually using topographic maps at a scale of 1:63,360 and 1:50,000 (nominal) scale, color-infrared aerial photographs. 10 Approximate error in meters. Surficial-geologic map data have a horizontal positional accuracy dependent on: (1) the 1:50,000-scale (nominal) aerial photographs on which they are based, with an estimated potential error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; (2) the accuracy of the human zoom transfer scope operator in tracing the line work from acetate overlays to topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; (3) the accuracy of the zoom transfer process itself, error magnitude highly variable and unknown but potentially large; (4) the digitizing RMS error of 0.003 inches [input coverage units], which equates to approximately 5 meters on the ground for a 1:63,360-scale map; and (5) the accuracy of the human operator digitizing the geologic line work from the topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground. Total potential horizontal error for surficial-geologic map features is therefore estimated to be approximately 10 meters. Reger, R.D. Pinney, D.S. 1996 Report None None Anchorage, Alaska Cook Inlet Historical Society p. 15-35 None Davis, N.Y. (ed.) Davis, W.E. (ed.) 1996 Report None None Anchorage, Alaska Cook Inlet Historical Society p. 15-35 Paper report 1996 Publish date Reger and Pinney, 1996 These data were used to further define the geology of the Chulitna area. See this publication cited in the Process Step section below. Ten Brink, N.W. 1983 Report University of Alaska Museum Occasional Paper No. 2 Fairbanks, Alaska Alaska Quaternary Center Pages 82-91 of larger work None Thorson, R.M (ed.) Hamilton, T.D. (ed.) 1983 Report University of Alaska Museum Occasional Paper No. 2 Fairbanks, Alaska Alaska Quaternary Center Used pages 82-91 from this publication paper 1983 Publication date Ten Brink, 1983 These data were used to further define the geology of the Chulitna area. See this publication cited in the Process Step section below. Wahrhaftig, Clyde 1958 Map and report U.S. Geological Survey Professional Paper PP 293-A Washington, D.C. United States Government Printing Office p. 1-68 None Wahrhaftig, Clyde Black, R.F. 1958 Map and report U.S. Geological Survey Professional Paper PP 293 Washington, D.C. United States Government Printing Office p. 1-68 250000 paper 1958 Publication date Wahrhaftig, 1958 These data were used to further define the geology of the Chulitna area. See this publication cited in the Process Step section below. Fieldwork - Fieldwork for geologic investigations, including ridge and valley traverses, road cut investigations, and river exposures, was conducted for approximately seven person-days in June 1997 by a surficial geologist. Field notes and sediment samples were collected throughout the area for surficial investigations. Surficial mapping involved using Reger and Pinney (1996), Ten Brink (1983), and Wahrhaftig (1958) on a regular basis for checking and correlating general units. Surficial mapper recorded observations on co-registered acetate overlays on 1:50,000-scale (nominal) color-infrared aerial photographs, and directly on 1:63,360-scale topographic base maps. Stations were located using air photos and topographic maps. Reger and Pinney, 1996 Ten Brink, 1983 Wahrhaftig, 1958 1998 Photo interpretation - Before, during, and after fieldwork, surficial-geologic information was interpreted using 1:50,000-scale (nominal) color-infrared air-photo stereopairs, and compiled onto acetate overlays. Photo interpretation was based on field notes from fieldwork process step (above), observed land forms and relationships in the photos, and all known geologic data from previous work in the area. The main sources of existing data include Reger and Pinney (1996), Ten Brink (1983), and Wahrhaftig (1958). The overlay information was transferred to a paper 1:63,360-scale USGS topographic base using a zoom transfer scope. 1998 Digital cartography - Surficial-geologic information was digitized from the paper USGS topographic base map (above) into Arc/Info 7.0.4 GIS (ArcEdit module) using a large-format digitizing table. Surficial-geologic polygons and lines were then edited and attributed using Arc, Info, and ArcEdit. Bedrock point data of locations of structural observations (strike, dip, cleavage, jointing, etc.) were intersected with the surficial-geologic polygon coverage using the Arc command "intersect" in order to identify locations that were mapped as surficial materials based on aerial photography but were found to have small exposures that were desirable to be mapped as bedrock. These areas were then modified in the surficial-geologic coverages to be areas of bedrock exposure. Final bedrock and surficial geology polygon coverages were merged using the Arc command "union" to generate the polygon coverage used to make RI 2001-1B, the comprehensive geologic map. 2001 Universal Transverse Mercator 6 0.9996 -147.000 0.0 500000 0.0 coordinate pair 0.000128 0.000128 meters chu_allsrfgeo_arc Universal Transverse Mercator 6 0.9996 -147.000 0.0 500000 0.0 coordinate pair 0.000128 0.000128 meters chu_allsrfgeo_polygon Universal Transverse Mercator 6 0.9996 -147.000 0.0 500000 0.0 coordinate pair 0.000032 0.000032 meters chu_eskers_arc Universal Transverse Mercator 6 0.9996 -147.000 0.0 500000 0.0 coordinate pair 0.000064 0.000064 meters chu_terraces_arc North American Datum of 1927 Clarke 1866 6378206.4 294.978698 chu_terraces_arc.shp Object type is vector, there are 153 rows associated with this entity, and the entity values refer to stream terrace risers Alaska Division of Geological & Geophysical Surveys chu_terraces_arc symbol Line symbol for surficial features Alaska Division of Geological & Geophysical Surveys 58 Stream terrace riser, with hatchures pointing downslope Alaska Division of Geological & Geophysical Surveys chu_eskers_arc.shp Object type is vector, there are 29 rows associated with this entity, there are no attributes associated with this entity, and the entity values refer to esker crests Alaska Division of Geological & Geophysical Surveys chu_eskers_arc chu_allsrfgeo_arc.shp Object type is vector, there are 3849 rows associated with this entity, and the entity values refer to surficial geologic map unit contacts. Alaska Division of Geological & Geophysical Surveys chu_allsrfgeo_arc CODE Line symbol for surficial geologic map unit contacts Alaska Division of Geological & Geophysical Surveys 6 Contact, approximately located Alaska Division of Geological & Geophysical Surveys chu_allsrfgeo_polygon.shp Object type is vector, there are 1604 rows associated with this entity, and the entity values refer to surficial geologic map units. Alaska Division of Geological & Geophysical Surveys chu_allsrfgeo_polygon UNIT Surficial map unit labels, any unit ending with a "?" indicates uncertainty Alaska Division of Geological & Geophysical Surveys b Undifferentiated bedrock Alaska Division of Geological & Geophysical Surveys bc Thinly covered bedrock Alaska Division of Geological & Geophysical Surveys lake Lake Alaska Division of Geological & Geophysical Surveys glacier Glacier Alaska Division of Geological & Geophysical Surveys RI2001-1_codeset.pdf Alaska Division of Geological & Geophysical Surveys http://www.dggs.dnr.state.ak.us/metadata/RI2001-1_codeset.pdf X-COORD X-coordinate ESRI, Arc command "addxy", numeric coordinates defining feature location 0 393398.2 meters Y-COORD Y-coordinate ESRI, Arc command "addxy", numeric coordinates defining feature location 0 7021089 meters SUNIT Surficial map unit labels, indicates source of the unit name is from the Surficial-geologic map of the Chulitna region, southcentral Alaska (RI 2001-1C). Any unit ending with a "?" indicates uncertainty Alaska Division of Geological & Geophysical Surveys b Undifferentiated bedrock Alaska Division of Geological & Geophysical Surveys bc Thinly covered bedrock Alaska Division of Geological & Geophysical Surveys lake Lake Alaska Division of Geological & Geophysical Surveys glacier Glacier Alaska Division of Geological & Geophysical Surveys RI2001-1_codeset.pdf Alaska Division of Geological & Geophysical Surveys http://www.dggs.dnr.state.ak.us/metadata/RI2001-1_codeset.pdf SURFBED Code designator to distinguish areas of surficial deposits from areas of bedrock deposits Alaska Division of Geological & Geophysical Surveys S Surficial deposit Alaska Division of Geological & Geophysical Surveys B Bedrock deposit, including exposed and thinly-covered units Alaska Division of Geological & Geophysical Surveys JUSTBED Map unit labels in which all exposed bedrock and thinly covered bedrock are combined into a single bedrock unit, whereas the surficial-geologic deposits retain their original unit designations. Alaska Division of Geological & Geophysical Surveys RI2001-1_codeset.pdf Alaska Division of Geological & Geophysical Surveys http://www.dggs.dnr.state.ak.us/metadata/RI2001-1_codeset.pdf BX Undifferentiated bedrock and thinly covered bedrock Alaska Division of Geological & Geophysical Surveys lake Lake Alaska Division of Geological & Geophysical Surveys glacier Glacier 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. Report of Investigation 2001-1C 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 $14.00 (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=3313 ArcGIS Shapefile ESRI ArcGIS 9.x No compression applied http://www.dggs.dnr.state.ak.us/pubs/pubs?reqtype=citation&ID=3313 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 20090315 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.