Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district

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Frequently anticipated questions:

What does this data set describe?

Title:
Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district
Abstract:
Geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted field investigations and geochemical rock sampling during the 1999, 2000, and 2001 field seasons to produce a 1:63,360 scale bedrock map of the Eagle A-1 Quadrangle, Alaska. Rock outcrop throughout the field area is limited; consequently, the map interpretation relies heavily on airborne magnetic and electromagnetic survey data and accompanying geochemical analysis of rock samples. Field investigations are part of a three-year mapping program to provide geologic ground truth for airborne geophysical surveys flown by DGGS in the Fortymile mining district during 1998. This work aims to build an improved understanding of the area's geology and controls on gold mineralization for purposes of exploration targeting and mineral-resource assessment. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/2864.
Supplemental_Information:
This geodatabase is a digital geologic map produced by the Alaska Division of Geological & Geophysical Surveys. The features, fields, and allowable values for this geodatabase object are defined in 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, which is adapted from U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema) - A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, Book 11, chap. B10, 74 p. https://doi.org//10.3133/tm11B10.
  1. How might this data set be cited?
    Szumigala, D.J., Newberry, R.J., Werdon, M.B., Athey, J.E., Flynn, R.L., and Clautice, K.H., 2002, Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district: Preliminary Interpretive Report PIR 2002-1B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -142.011317
    East_Bounding_Coordinate: -141.000000
    North_Bounding_Coordinate: 64.253103
    South_Bounding_Coordinate: 63.996231
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2001
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: geodatabase
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a vector data set.
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 7
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -141
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000.000000
      False_Northing: 0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest .00000001
      Ordinates (y-coordinates) are specified to the nearest .00000001
      Planar coordinates are specified in Meters
      The horizontal datum used is NAD27.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.40000000037.
      The flattening of the ellipsoid used is 1/294.978698199999997.
  7. How does the data set describe geographic features?
    eagle_a1_bedrock_geology_ak_gems_db_pkg
    geodatabase, layer files, style files, and fonts (Source: Alaska Division of Geological & Geophysical Surveys)
    eagle_a1_bedrock_geology_fed_gems_db_pkg
    geodatabase, layer files, style files, and fonts (Source: Alaska Division of Geological & Geophysical Surveys)
    eagle_a1_bedrock_geology_fed_gems_shapefile_pkg
    shapefiles and open data files (Source: Alaska Division of Geological & Geophysical Surveys)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
    The geologic mapping 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.
  3. To whom should users address questions about the data?
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    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.

Why was the data set created?

This project and resulting map and data are intended to provide a geologic map and geologic interpretation of a portion of the Fortymile mining district at 1:63,360 scale. Previous published geologic maps at a 1:63,360 scale 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 geologic features that may relate to more regional structures, geologic units, or mineralization. These detailed observations are also critical to test or use in tectonic models and this map also provides a geologic base in which to interpret geochemical results from the concurrent DGGS rock sampling program.

How was the data set created?

  1. From what previous works were the data drawn?
    DGGS Staff and others, 1999 (source 1 of 17)
    Staff, DGGS, Geoterrex-Dighem, and Stevens Exploration Management Corp., 1999, CD-ROM containing profile and gridded data and section lines of the 1998 geophysical survey data for part of the Fortymile mining district, Alaska, southern Eagle and northern Tanacross quadrangles: Public Data File PDF 99-9, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 DVD
    Type_of_Source_Media: paper
    Source_Contribution: Bedrock mapping
    Ekberg, P.G. and others, 2021 (source 2 of 17)
    Ekberg, P.G., Hendricks, M.D., and Athey, J.E., 2021, AK GeMS symbology: A description of the AK GeMS style file: Miscellaneous Publication MP 169, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 7 p
    Type_of_Source_Media: digital
    Source_Contribution: GeMS conversion
    Foster, H.L., 1969 (source 3 of 17)
    Foster, H.L., 1969, Reconnaissance geology of the Eagle A-1 and A-2 quadrangles, Alaska: Bulletin B 1271-G, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: p. G1-G30, 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Bedrock mapping
    Gray, J.E. and Riehle, J.R., 1998 (source 4 of 17)
    Gray, J.E., and Riehle, J.R., 1998, Geologic studies in Alaska by the U.S. Geological Survey, 1996: Professional Paper P 1595, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 200 p
    Type_of_Source_Media: paper
    Source_Contribution: Bedrock mapping
    Hendricks, M.D. and others, 2020 (source 5 of 17)
    Hendricks, M.D., Ekberg, P.G., Athey, J.E., and Wyatt, W.C., 2020, AK GeMS data dictionary: A description of the AK GeMS database schema: Miscellaneous Publication MP 168, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Type_of_Source_Media: digital
    Source_Contribution: GeMS conversion
    Neuendorf, K.K.E. and others, 2011 (source 6 of 17)
    Neuendorf, K.K.E., Mehl, J.P., Jr., and Jackson, J.A., 2011, Glossary of Geology: American Geological Institute, Alexandria, Virginia.

    Online Links:

    Other_Citation_Details: 799 p
    Type_of_Source_Media: digital
    Source_Contribution: GeMS conversion
    Newberry, R.J. and others, 1998, p. 131-159 (source 7 of 17)
    Newberry, R.J., Layer, P.W., Burleigh, R.E., and Solie, D.N., 1998, New 40Ar/39Ar dates for intrusions and mineral prospects in the eastern Yukon-Tanana terrane, Alaska; regional patterns and significance: Professional Paper P 1595, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: p. 131-159
    Type_of_Source_Media: paper
    Source_Contribution: Bedrock mapping
    Szumigala, D.J. and others, 2002 (source 8 of 17)
    Szumigala, D.J., Newberry, R.J., Werdon, M.B., Athey, J.E., Flynn, R.L., and Clautice, K.H., 2002, Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district: Preliminary Interpretive Report PIR 2002-1B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Bedrock mapping
    Szumigala, D.J. and others, 2002 (source 9 of 17)
    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: Preliminary Interpretive Report PIR 2002-1A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Bedrock mapping
    Szumigala, D.J. and others, 2000 (source 10 of 17)
    Szumigala, D.J., Newberry, R.J., Werdon, M.B., Finseth, B.A., Pinney, D.S., and Flynn, R.L., 2000, Major-oxide, minor-oxide, trace-element, and geochemical data from rocks collected in a portion of the Fortymile mining district, Alaska, 1999: Raw Data File RDF 2000-1 v. 1.0.1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 24 p., 2 sheets, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Bedrock mapping
    Szumigala, D.J. and others, 2002 (source 11 of 17)
    Szumigala, D.J., Werdon, M.B., Newberry, R.J., Athey, J.E., Clautice, K.H., Flynn, R.L., Grady, J.C., Munly, W.C., and 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, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 35 p., 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Bedrock mapping
    U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020 (source 12 of 17)
    U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)—A standard format for the digital publication of geologic maps: Techniques and Methods TM 11-B10, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 1 p
    Type_of_Source_Media: digital
    Source_Contribution: GeMS conversion
    Walker, J.D. and others, 2018 (source 13 of 17)
    Walker, J.D., Geissman, J.W., Bowring, S.A., and Babcock, L.E., 2018, Geologic Time Scale v. 5.0: Geological Society of America, Boulder, CO.

    Online Links:

    Type_of_Source_Media: digital
    Source_Contribution: GeMS conversion
    Werdon, M.B. and others, 2001 (source 14 of 17)
    Werdon, M.B., Newberry, R.J., and Szumigala, D.J., 2001, Bedrock geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska: Preliminary Interpretive Report PIR 2001-3B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Bedrock mapping
    Werdon, M.B. and others, 2000 (source 15 of 17)
    Werdon, M.B., Szumigala, D.J., Newberry, R.J., Grady, J.C., and Munly, W.C., 2000, Major-oxide, minor-oxide, trace-element, rare-earth element, and geochemical data from rocks collected in Eagle and Tanacross quadrangles, Alaska in 2000: Raw Data File RDF 2000-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 29 p., 3 sheets, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Bedrock mapping
    Wilson, F.H. and Galloway, J.P., 2002 (source 16 of 17)
    Wilson, F.H., and Galloway, J.P., 2002, Studies by the U.S. Geological Survey in Alaska, 2000: Professional Paper P 1662, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 149 p
    Type_of_Source_Media: paper
    Source_Contribution: Bedrock mapping
    Yeend, W.E., 1996 (source 17 of 17)
    Yeend, W.E., 1996, Gold placers of the historical Fortymile River region, Alaska: Bulletin B 2125, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 75 p., 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: Bedrock mapping
  2. How were the data generated, processed, and modified?
    Date: 2001 (process 1 of 5)
    Bedrock mapping - During the summers of 1999 through 2001, DGGS conducted a geologic field mapping project to provide geologic ground truth for airborne geophysical surveys flown in the Fortymile mining district in 1998. DGGS efforts are focused on determining and understanding the geologic framework of the Fortymile mining district, especially with respect to placer gold and lode mineral deposits. Fieldwork for bedrock investigations, including ridge traverses, roadcut investigations, and river exposures, was conducted for 374 person-days during the months of June through August in 1999 - 2001. Field notes and rock samples were collected at more than 3,880 stations throughout the quadrangle for bedrock investigations. Sixty person-days were spent on field investigations for the surficial geology. Bedrock mappers recorded observations on 1:50,000-scale topographic maps of the quadrangle. Stations were located using handheld GPS devices with location precision varying from 3 to 15 meters. Selected rock samples were analyzed for age and geochemical properties. Laboratory analyses were performed on rock samples collected during the fieldwork from July 1999 intermittently through April 2002. Published geochemical and age results are found in Newberry and others (1998), Szumigala and others (2000, 2002), Werdon and others (2000), Flynn and Newberry (2001), Layer and others (in prep.), and Day and others (in press). Unpublished laboratory results include petrographic work on thin sections and modal analysis of rock slabs stained for plagioclase and potassium feldspar. Results from major-oxide and trace-element geochemistry of igneous and metamorphic rocks were used to calculate CIPW Norms for use in classifying rocks according to established petrologic nomenclature. The map unit interpretation relies heavily on airborne magnetic and electromagnetic survey data and rock geochemistry. Data sources used in this process:
    • DGGS Staff and others, 1999
    • Foster, H.L., 1969
    • Gray, J.E. and Riehle, J.R., 1998
    • Newberry, R.J. and others, 1998, p. 131-159
    • Szumigala, D.J. and others, 2002
    • Szumigala, D.J. and others, 2002
    • Szumigala, D.J. and others, 2000
    • Szumigala, D.J. and others, 2002
    • Werdon, M.B. and others, 2001
    • Werdon, M.B. and others, 2000
    • Wilson, F.H. and Galloway, J.P., 2002
    • Yeend, W.E., 1996
    Date: 2001 (process 2 of 5)
    Digital cartography - Bedrock data were compiled on multiple layers of stable mylar at 1:50,000 scale, with some information plotted at 1:25,000 scale for more detail and later transferred to 1:50,000-scale mylar layers. Data were queried from Microsoft Access 2000 databases, imported into GIS software, and plotted on mylar at 1:50,000 scale to answer specific geologic questions. Relevant information from all mylar layers was compiled onto one stable mylar sheet with abundant control points. The bedrock-geologic map compilation mylar was scanned by a large-format scanner and saved as a TIFF image. The TIFF image was registered into MapInfo Professional 6.5 with multiple registration points, and a registration error of approximately 2.7 meters (RMS error) was obtained. Geologic contacts and unit polygons were digitized using MapInfo Professional 6.5. and ArcInfo 7.0.4. GPS values of point features were imported from spreadsheets and coded according to the attribute specifications.
    Date: 2001 (process 3 of 5)
    Technical review - The geologic map was evaluated for technical content by geologists familiar with the map area, and reviewer feedback was incorporated into the final product.
    Date: 2001 (process 4 of 5)
    Data release - The report and map were published, and GIS products were compiled and released in shapefile format.
    Date: 2021 (process 5 of 5)
    GeMS conversion - The geologic and geographic features portrayed in this data distribution package were organized and attributed according to the AK GeMS geologic mapping schema and derivative files using the USGS GeMS standard were created. These revised data packages replace files provided in the initial, 2002, release. Data sources used in this process:
    • Ekberg, P.G. and others, 2021
    • Hendricks, M.D. and others, 2020
    • Neuendorf, K.K.E. and others, 2011
    • U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020
    • Walker, J.D. and others, 2018
  3. What similar or related data should the user be aware of?
    Staff, DGGS, and Szumigala, D.J., 2000, Alaska GeoSurvey News - Mineral-oriented geologic mapping of the Fortymile mining district: Newsletter NL 2000-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 9 p
    Pinney, D.S., 2001, Engineering - geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska: Preliminary Interpretive Report PIR 2001-3D, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Pinney, D.S., 2001, Surficial-geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska: Preliminary Interpretive Report PIR 2001-3C, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Stevens, D.S.P., 2012, Engineering - geologic map of the Eagle A-1 Quadrangle, Fortymile mining district, Alaska: Preliminary Interpretive Report PIR 2002-1D, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Stevens, D.S.P., and Burns, P.A.C., 2010, Surficial-geologic map of the Eagle A-1 Quadrangle, Fortymile mining district: Preliminary Interpretive Report PIR 2002-1C, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    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: Preliminary Interpretive Report PIR 2002-1A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Szumigala, D.J., Newberry, R.J., Werdon, M.B., Finseth, B.A., Pinney, D.S., and Flynn, R.L., 2000, Major-oxide, minor-oxide, trace-element, and geochemical data from rocks collected in a portion of the Fortymile mining district, Alaska, 1999: Raw Data File RDF 2000-1 v. 1.0.1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 24 p., 2 sheets, scale 1:63,360
    Szumigala, D.J., Newberry, R.J., Werdon, M.B., Finseth, B.A., and Pinney, D.S., 2000, Preliminary bedrock geologic map of a portion of the Fortymile mining district, Alaska: Preliminary Interpretive Report PIR 2000-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Szumigala, D.J., Werdon, M.B., Newberry, R.J., Athey, J.E., Clautice, K.H., Flynn, R.L., Grady, J.C., Munly, W.C., and 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, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 35 p., 1 sheet, scale 1:63,360
    Werdon, M.B., Newberry, R.J., Szumigala, D.J., and Pinney, D.S., 2001, Geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska: Preliminary Interpretive Report PIR 2001-3A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Werdon, M.B., Newberry, R.J., and Szumigala, D.J., 2001, Bedrock geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska: Preliminary Interpretive Report PIR 2001-3B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Werdon, M.B., Szumigala, D.J., Newberry, R.J., Grady, J.C., and Munly, W.C., 2000, Major-oxide, minor-oxide, trace-element, rare-earth element, and geochemical data from rocks collected in Eagle and Tanacross quadrangles, Alaska in 2000: Raw Data File RDF 2000-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 29 p., 3 sheets, scale 1:63,360

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Certainty in attribute interpretation varies throughout the map and is scale dependant. Attribute fields within each feature class record the author's degree of confidence in the existence or identity of applicable features.
  2. How accurate are the geographic locations?
    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 author's degree of confidence in the location of applicable features.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This publication is a DGGS Preliminary Interpretive Report (PIR). This category is intended for the timely release of maps and reports with preliminary interpretation of geology or analytical data. It includes reports by DGGS staff, scientists from other organizations, and contractor reports containing technical interpretations of analytical data. Maps and reports have been reviewed by one or two people for technical content.
  5. How consistent are the relationships among the observations, including topology?
    All polygon features were topologically validated according to specifications of the AK GeMS geologic mapping schema

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints:
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).
Use_Constraints:
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.
  1. Who distributes the data set? (Distributor 1 of 1)
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    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.
  2. What's the catalog number I need to order this data set? PIR 2002-1B
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 29-Jun-2021
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Attn: Simone Montayne
Metadata Manager
3354 College Road
Fairbanks, AK
USA

(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov
Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:
Generated by mp version 2.9.50 on Tue Jun 29 15:59:31 2021