Bedrock-geologic map, Alaska Highway corridor, Little Gerstle River to Dot Lake, Alaska

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Frequently anticipated questions:

What does this data set describe?

Title:
Bedrock-geologic map, Alaska Highway corridor, Little Gerstle River to Dot Lake, Alaska
Abstract:
Preliminary Interpretive Report 2019-1, Bedrock-geologic map, Alaska Highway corridor, Little Gerstle River to Dot Lake, Alaska, shows the distribution of bedrock units along the Alaska Highway in parts of the Mt. Hayes C-1, C-2, D-1, and D-2 quadrangles. It is the westernmost of three bedrock-geologic maps along the Alaska Highway corridor. It is part of a multi-year project conducted by the Alaska Division of Geological & Geophysical Surveys (DGGS) between 2006 and 2013. The project focused on investigating and reporting the geology and geologic hazards of the corridor. Bedrock units were mapped and structural elements were measured in the field; where bedrock units are covered by surficial units and vegetation, units were interpreted using airborne-magnetic and electromagnetic surveys published by DGGS in 2006. Rock names were assigned based on field and petrographic observations, modal-mineral percentages, and interpretations of geochemical data. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/30036.
Supplemental_Information:
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
  1. How might this data set be cited?
    Werdon, M.B., Solie, D.N., Newberry, R.J., Freeman, L.K., Elliott, B.A., and Lessard, R.R., 2019, Bedrock-geologic map, Alaska Highway corridor, Little Gerstle River to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2019-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 12 p., 1 sheet, scale 1:63,360
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -145.027470
    East_Bounding_Coordinate: -143.955187
    North_Bounding_Coordinate: 63.938264
    South_Bounding_Coordinate: 63.500060
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2013
    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: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -147
      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?
    ak_hwy_bedrock_segment_1_ak_gems_db_pkg
    Geodatabase, layer files, style files, and fonts (Source: Alaska Division of Geological & Geophysical Surveys)
    ak_hwy_bedrock_segment_1_fed_gems_db_pkg
    Geodatabase, layer files, style files, and fonts (Source: Alaska Division of Geological & Geophysical Surveys)
    ak_hwy_bedrock_segment_1_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?
    This research was supported by State of Alaska FY06, FY07, and FY09 Capital Improvement Project (CIP) funding. Partial funding for geologic mapping in the Mt. Hayes C-1, C-2, D-1, and D-2 quadrangles was also provided by the U.S. Geological Survey, National Cooperative Geologic Mapping Program, under STATEMAP award number 07HQAG0076. The authors thank Jamey V. Jones, Cynthia Dusel-Bacon, and Robert F. Swenson for their thoughtful reviews. 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 State of Alaska or the United States government. Geologic map conversion to the GeMS standard was funded by the USGS National Geological and Geophysical Data Preservation Program under award number G20AP00103 and the State of Alaska General Fund.
  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?

The Alaska Highway corridor project focused on investigating and reporting the geology and geologic hazards of the highway corridor.

How was the data set created?

  1. From what previous works were the data drawn?
    Athey, J.E. and others, 2002 (source 1 of 8)
    Athey, J.E., Werdon, M.B., Szumigala, D.J., Newberry, R.J., and Johnson, M.R., 2002, Major-oxide, minor-oxide, trace-element, and geochemical data from the rocks collected in the Big Delta Quadrangle, Alaska in 2001: Raw Data File RDF 2002-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 18 p., 2 sheets, scale 1:150,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 150000
    Source_Contribution: Bedrock geologic mapping
    Burns, L.E. and others, 2019 (source 2 of 8)
    Burns, L.E., Barefoot, J.D., Graham, G.R.C., Naibert, T.J., Geoterrex-Dighem, and Stevens Exploration Management Corp., 2019, Salcha River-Pogo electromagnetic, magnetic, and radiometric airborne geophysical survey data compilation: Geophysical Report GPR 2019-8, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 22 p
    Type_of_Source_Media: paper
    Source_Contribution: Bedrock geologic mapping
    Ekberg, P.G. and others, 2021 (source 3 of 8)
    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: paper
    Source_Contribution: GIS analysis and digital cartography
    Hendricks, M.D. and others, 2021 (source 4 of 8)
    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: Miscellaneous Publication MP 170, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 10 p
    Type_of_Source_Media: paper
    Source_Contribution: GIS analysis and digital cartography
    Newberry, R.J., 2012 (source 5 of 8)
    Newberry, R.J., 2012, Whole-rock and trace element analyses of two amphibolite outcrop samples from the 2001 DGGS Salcha River-Pogo project, Big Delta Quadrangle, Alaska: Geologic Materials Center Data Report GMC 411, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 p
    Type_of_Source_Media: paper
    Source_Contribution: Bedrock geologic mapping
    Reger, R.D. and Pewe, T.L., 2002 (source 6 of 8)
    Reger, R.D., and Pewe, T.L., 2002, Geologic map of the Big Delta A-4 Quadrangle, Alaska: Report of Investigation RI 2002-2, 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 geologic mapping
    Werdon, M.B. and others, 2001 (source 7 of 8)
    Werdon, M.B., Athey, J.E., Szumigala, D.J., Newberry, R.J., Grady, J.C., and Munly, W.C., 2001, Major-oxide, minor-oxide, trace-element, and geochemical data from rocks collected in the Salcha River-Pogo area in 2000, Big Delta and northwestern Eagle quadrangles, Alaska: Raw Data File RDF 2001-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 19 p., 1 sheet, scale 1:250,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: Bedrock geologic mapping
    Werdon, M.B. and others, 2003 (source 8 of 8)
    Werdon, M.B., Newberry, R.J., Athey, J.E., Szumigala, D.J., Freeman, L.K., Lessard, R.R., Hendry, K.R., and Wiltse, M.A., 2003, Major-oxide, minor-oxide, trace-element, and geochemical data from rocks collected in the Big Delta Quadrangle, Alaska in 2002: Raw Data File RDF 2003-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 45 p
    Type_of_Source_Media: paper
    Source_Contribution: Bedrock geologic mapping
  2. How were the data generated, processed, and modified?
    Date: 2013 (process 1 of 3)
    Bedrock geologic mapping - Bedrock field investigations for the Alaska Highway corridor project were conducted over several summers between 2006 and 2013. Bedrock units were mapped and structural elements were measured in the field. Where surficial units and vegetation cover bedrock units, units were interpreted using airborne-magnetic and electromagnetic surveys published by DGGS in 2006. Rock names were assigned based on field and petrographic observations, modal-mineral percentages, and interpretations of geochemical data. Age determination and interpretation of cross-cutting relationships where facilitated by 40Ar/39Ar, Zircon U-Pb, and apatite fission-track geochronologic analysis. Data sources used in this process:
    • Athey, J.E. and others, 2002
    • Burns, L.E. and others, 2019
    • Newberry, R.J., 2012
    • Reger, R.D. and Pewe, T.L., 2002
    • Werdon, M.B. and others, 2001
    • Werdon, M.B. and others, 2003
    Date: 2019 (process 2 of 3)
    Geologic map compilation - Data for the digital geologic map was digitized from a Mylar geologic field map compilation. This compilation was done on a one to one scale, stable Mylar of the USGS topographic base for each of the 1:63,360 scale USGS topographic bases included in the map area. The report and accompanying data were evaluated by project staff and peer reviewers for readability and logical consistency with related information sources.
    Date: 2021 (process 3 of 3)
    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. Data sources used in this process:
    • Ekberg, P.G. and others, 2021
    • Hendricks, M.D. and others, 2021
  3. What similar or related data should the user be aware of?
    Hubbard, T.D., Reger, R.D., and Gallagher, P.E., 2011, Using lidar to refine geologic mapping and interpretations in the upper Tanana River valley, central Alaska (poster): Geological Society of America Annual Meeting, Minneapolis, MN, October 9-12, 2011, Abstracts with Programs, v. 43, no. 5, p. 623: Poster and Presentation Hubbard, T.D. and others, 2011, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet
    Hubbard, T.D., Reger, R.D., and Gallagher, P.E., 2013, Engineering - geologic map of the Alaska Highway corridor, Tetlin Junction to Canada border, Alaska: Preliminary Interpretive Report PIR 2012-1B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 sheets, scale 1:63,360
    Hubbard, T.D., and Reger, R.D., 2010, Alaska GeoSurvey News - Evidence for late Wisconsinan outburst floods in the Tok-Tanacross basin, upper Tanana River valley, east-central Alaska: Newsletter NL 2010-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 9 p
    Hubbard, T.D., and Reger, R.D., 2010, Engineering - geologic map of the Alaska Highway corridor, Robertson River to Tetlin Junction, Alaska: Preliminary Interpretive Report PIR 2009-6B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 sheets, scale 1:63,360
    Reger, R.D., Hubbard, T.D., and Carver, G.A., 2011, Surficial geology of Alaska Highway corridor, Robertson River to Tetlin Junction, Alaska: Preliminary Interpretive Report PIR 2009-6A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 53 p., 4 sheets, scale 1:63,360
    Reger, R.D., Hubbard, T.D., and Gallagher, P.E., 2012, Reconnaissance interpretation of 1978-1981 permafrost, Alaska Highway corridor, Tetlin Junction to Canada border, Alaska: Preliminary Interpretive Report PIR 2012-1C, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 27 p., 2 sheets, scale 1:63,360
    Reger, R.D., Hubbard, T.D., and Gallagher, P.E., 2012, Surficial geology of the Alaska Highway corridor, Tetlin Junction to Canada border, Alaska: Preliminary Interpretive Report PIR 2012-1A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 25 p., 2 sheets, scale 1:63,360
    Reger, R.D., Hubbard, T.D., and Koehler, R.D., 2021, Surficial geology and geohazards in the Alaska Highway corridor, Alaska: Professional Report PR 124, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 149 p., 18 sheets, scale 1:63,360
    Reger, R.D., Stevens, D.S.P., and Solie, D.N., 2008, Evidence of multiple late Pleistocene outburst floods, upper Tanana River valley, east-central Alaska (presentation): Geological Society of America Cordilleran Section and Rocky Mountain Section Joint Meeting, Las Vegas, Nevada, March 19-21, 2008: Poster and Presentation Reger, R.D. and others, 2008, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 30 p
    Reger, R.D., Stevens, D.S.P., and Solie, D.N., 2008, Surficial-geologic map, Delta Junction to Dot Lake, Alaska Highway corridor: Preliminary Interpretive Report PIR 2008-3A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 48 p., 2 sheets, scale 1:63,360
    Reger, R.D., and Hubbard, T.D., 2009, Evidence for late Wisconsinan outburst floods in the Tok-Tanacross basin, upper Tanana River valley, east-central Alaska (poster): Geological Society of America Annual Meeting, Portland, Oregon, October 21, 2009.: Poster and Presentation Reger, R.D. and Hubbard, T.D., 2009, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet
    Reger, R.D., and Hubbard, T.D., 2010, Reconnaissance interpretation of 1978-1983 permafrost, Alaska Highway corridor, Robertson River to Tetlin Junction, Alaska: Preliminary Interpretive Report PIR 2009-6C, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 13 p., 4 sheets, scale 1:63,360
    Reger, R.D., and Solie, D.N., 2008, Engineering - geologic map, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 sheets, scale 1:63,360
    Reger, R.D., and Solie, D.N., 2008, Reconnaissance interpretation of permafrost, Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3C, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 10 p., 2 sheets, scale 1:63,360
    Solie, D.N., Werdon, M.B., Freeman, L.K., Newberry, R.J., Szumigala, D.J., Speeter, G.G., and Elliott, B.A., 2019, Bedrock-geologic map, Alaska Highway corridor, Tetlin Junction, Alaska to Canada border: Preliminary Interpretive Report PIR 2019-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 16 p., 2 sheets, scale 1:63,360
    Solie, D.N., and Burns, L.E., 2006, Geology, geophysics, and geohazards along the Alaska Highway corridor, a project of the Alaska Division of Geological & Geophysical Surveys (poster): Yukon Geoscience Annual Convention, Whitehorse, November, 2006: Poster and Presentation Solie, D.N. and Burns, L.E., 2006, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet
    Solie, D.N., and Werdon, M.B., 2014, Geologic notes on Granite Mountain, Mount Hayes D-3 Quadrangle, Alaska: Raw Data File RDF 2014-23, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Stewart, A.K., Heinrich, C.E., and Hubbard, T.D., 2017, Dendrogeomorphic evidence of frequent mass movement using reaction wood in black spruce: Alaska Highway milepost 1267, Northway Junction, Alaska: Report of Investigation RI 2017-7, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 18 p
    Werdon, M.B., Solie, D.N., Andrew, J.E., Freeman, L.K., Newberry, R.J., Szumigala, D.J., and Elliott, B.A., 2019, Bedrock-geologic map, Alaska Highway corridor, Dot Lake to Tetlin Junction, Alaska: Preliminary Interpretive Report PIR 2019-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 14 p., 2 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 authors' 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 authors' 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 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.
  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 2019-1
  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: 15-Jul-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 Thu Jul 15 15:12:24 2021