Stevens, D.S.P.
Burns, P.A.C.
2010
Surficial-geologic map of the Eagle A-1 Quadrangle, Fortymile mining district
geodatabase
Preliminary Interpretive Report
PIR 2002-1C
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
1 sheet, scale 1:63,360
https://doi.org/10.14509/22081
Preliminary Interpretive Report 2002-1C, Surficial-geologic map of the Eagle A-1 Quadrangle, Fortymile mining district, provides 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 the distribution of a variety of unconsolidated deposits and undifferentiated bedrock in the Eagle A-1 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. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/22081.
The purpose of the project was to produce a series of 1:63,360-scale geologic maps for a portion of the Fortymile mining district. The geologic data is important for characterizing and distinguishing between geologic units.Previously 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 greater detail is needed to identify critical geologic features that may relate to more regional geologic units. The Fortymile project is part of DGGS's Airborne Geophysical and Geological Mineral Inventory Program (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.
This geodatabase is organized according to the AK GeMS mapping schema Hendricks, M.D., Ekberg, P.G., Athey, J.E., Wyatt, W.C., Willingham, A.L., and Naibert, T.J., 2021, AK GeMS data dictionary: A description of the Alaska geologic mapping schema: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 170, 10 p. https://doi.org/10.14509/30669. The distribution package includes ESRI fonts and style files, along with usage instructions. Further documentation of the symbology is provided by Ekberg, P.G., Hendricks, M.D., and Athey, J.E., 2021, AK GeMS symbology: A description of the AK GeMS style file: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 169, 7 p. https://doi.org/10.14509/30584
1999
2002
ground condition
None planned
-141.504512
-141.000000
64.250853
63.999139
ISO 19115 Topic Category
geoscientificInformation
Alaska Division of Geological & Geophysical Surveys
Alluvial Deposits
Bison Fossils
Caribou Fossils
Colluvial Deposits
Complex Deposits
DGGS
GeMS
GeMS NCGMP09
Geologic Map
Geology
Glacial Deposits
Horse Fossils
Mammoth Fossils
Man-Made Deposits
Mining
STATEMAP Project
Sheep Fossils
Surficial
Surficial Geologic Map
Surficial Geology
Tailings
Terrace
Unconsolidated Deposits
Alaska Division of Geological & Geophysical Surveys
Alaska, State of
Boundary (Place)
Eagle Quadrangle
Fortymile Mining District
Fortymile River
Jack Wade Junction
Steele Creek Dome
Taylor Highway
Top of the World Highway
Walker Fork
Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America
Cenozoic
Holocene
Pleistocene
Quaternary
Tertiary
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
Metadata Manager
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 (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
The geologic work was funded by the Alaska State Legislature through a Capital Improvement Project (Alaska Airborne Geophysical/Geological Mineral Inventory Program) and the general fund and through the U.S. Geological Survey STATEMAP program under U.S. Department of the Interior, U.S. Geological Survey, National Cooperative Geologic Mapping Program assistance award 01HQAG0054. 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. DGGS student interns and volunteers providing field assistance include Bryan A. Finseth (1999), Mark Mccrary (1999), J.C. Grady (2000), W.C. Munley (2000), and M.R. Johnson (2001). Milton A. Wiltse provided technical review of the maps. Jessica Mayer provided assistance with surficial geologic studies.
Stevens, D.S.P.
Burns, P.A.C.
2010
Surficial-geologic map of the Eagle A-1 Quadrangle, Fortymile mining district
Preliminary Interpretive Report
PIR 2002-1C
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
1 sheet, scale 1:63,360
https://doi.org/10.14509/22081
Szumigala, D.J.
Newberry, R.J.
Werdon, M.B.
Athey, J.E.
Flynn, R.L.
Clautice, K.H.
2002
Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district
Preliminary Interpretive Report
PIR 2002-1B
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
1 sheet, scale 1:63,360
https://doi.org/10.14509/2864
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
Geologic map of the Eagle A-1 Quadrangle, Fortymile mining district
Preliminary Interpretive Report
PIR 2002-1A
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
1 sheet, scale 1:63,360
https://doi.org/10.14509/2863
Szumigala, D.J.
Werdon, M.B.
Newberry, R.J.
Athey, J.E.
Clautice, K.H.
Flynn, R.L.
Grady, J.C.
Munly, W.C.
Johnson, M.R.
2002
Major-oxide, minor-oxide, trace-element, rare-earth element, trace geochemical, and coal quality data from rocks collected in the Eagle and Tanacross quadrangles, Alaska in 1999, 2000, 2001
Raw Data File
RDF 2002-1
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
35 p., 1 sheet, scale 1:63,360
https://doi.org/10.14509/2866
Certainty in attribute interpretation varies throughout the map and is scale-dependent. Attribute fields within each feature class record the authors' degree of confidence in the existence or identity of applicable features.
All polygon features were topologically validated according to specifications of the AK GeMS geologic mapping schema.
This publication is released as a DGGS Preliminary Interpretive Report (PIR). A PIR is intended to provide timely release maps and reports with a preliminary interpretation of geology or analytical data. One or two people familiar with the geologic problem have reviewed this publication for technical content.
Certainty in feature boundaries or location varies throughout the map. Data fields within each feature class and the accompanying orientation and location confidence lookup tables record the authors' degree of confidence in the location of applicable features.
Ekberg, P.G.
Hendricks, M.D.
Athey, J.E.
2021
AK GeMS symbology: A description of the AK GeMS style file
Miscellaneous Publication
MP 169
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
7 p
https://doi.org/10.14509/30584
paper
2021
publication date
Ekberg, P.G. and others, 2021
GIS analysis and digital cartography
Hendricks, M.D.
Ekberg, P.G.
Athey, J.E.
Wyatt, W.C.
Willingham, A.L.
Naibert, T.J.
2021
AK GeMS data dictionary: A description of the Alaska geologic mapping schema
Miscellaneous Publication
MP 170
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
10 p
https://doi.org/10.14509/30669
paper
2021
publication date
Hendricks, M.D. and others, 2021
GIS analysis and digital cartography
Weber, F.R.
Hamilton, T.D.
1984
Glacial geology of the Mt. Prindle area, Yukon-Tanana upland, Alaska
Professional Report
PR 86H
Fairbanks, Alaska, United States
Alaska Division of Geological & Geophysical Surveys
p. 42-48
https://doi.org/10.14509/2267
paper
1984
publication date
Weber, F.R. and Hamilton, T.D., 1984, p. 42-48
Geologic mapping
Yeend, W.E.
1996
Gold placers of the historical Fortymile River region, Alaska
Bulletin
B 2125
United States
U.S. Geological Survey
75 p., 1 sheet, scale 1:63,360
https://dggs.alaska.gov/pubs/id/3781
63360
paper
1996
publication date
Yeend, W.E., 1996
Geologic mapping
Geologic mapping - Fieldwork for surficial investigations, including traverses, roadcut investigations, and river exposures, was conducted for 60 person-days during the months of June through August in 1999 - 2001. 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 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 handheld GPS devices with location precision varying from 3 to 15 meters.
Weber, F.R. and Hamilton, T.D., 1984, p. 42-48
Yeend, W.E., 1996
2001
Geologic map compilation - Surficial-geologic information was interpreted using 1:50,000-scale (nominal) air-photo stereopairs, and compiled onto acetate overlays. The overlay information was transferred to a paper 1:63,360-scale USGS topographic base using a zoom transfer scope. 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 (see DGGS PIR 2002-1B) of locations of structural observations (strike, dip, cleavage, jointing, etc.) and 'rubblecrop' 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 desireable 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 PIR 2002-1a, the comprehensive geologic map. Project staff and peer reviewers evaluated the report and accompanying data for readability and logical consistency with related information sources.
2002
GIS analysis and digital cartography - The geologic and geographic features portrayed in this data distribution package were organized and attributed according to the AK GeMS geologic mapping schema.
Ekberg, P.G. and others, 2021
Hendricks, M.D. and others, 2021
2021
vector
Universal Transverse Mercator
7
0.999600
-141
0
500000.000000
0
coordinate pair
.00000001
.00000001
Meters
NAD27
Clarke 1866
6378206.40000000037
294.978698199999997
eagle_a1_surficial_geology_ak_gems_db_pkg
Geodatabase, layer files, style files, and fonts
Alaska Division of Geological & Geophysical Surveys
eagle_a1_surficial_geology_ak_gems_db_pkg
eagle_a1_surficial_geology_fed_gems_db_pkg
Geodatabase, layer files, style files, and fonts
Alaska Division of Geological & Geophysical Surveys
eagle_a1_surficial_geology_fed_gems_db_pkg
eagle_a1_surficial_geology_fed_gems_shapefile_pkg
Shapefiles and open data files
Alaska Division of Geological & Geophysical Surveys
eagle_a1_surficial_geology_fed_gems_shapefile_pkg
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
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 (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
PIR 2002-1C
The State of Alaska makes no expressed 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.
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.
Contact DGGS for current pricing
geodatabase
https://doi.org/10.14509/22081
Free download
20210824
Alaska Division of Geological & Geophysical Surveys
Simone Montayne
Metadata Manager
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
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
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 Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.
https://dggs.alaska.gov/metadata/dggs.ext
dggs metadata extensions