Surficial-geologic map of the Kavik River area, west-central Mount Michelson Quadrangle, northeastern Brooks Range, Alaska

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Frequently-anticipated questions:


What does this data set describe?

Title:
Surficial-geologic map of the Kavik River area, west-central Mount Michelson Quadrangle, northeastern Brooks Range, Alaska
Abstract:
During the 2006 field season, the Alaska Division of Geological & Geophysical Surveys conducted remote mapping as part of the Kavik River STATEMAP project.This surficial-geologic mapping was conducted to provide additional detail to the STATEMAP comprehensive geologic mapping as well as to serve as a stand-alone map publication.
Supplemental_Information:
The coverages included in this project are digitized from a mylar compilation of geologic field observations recorded on U.S. Geological Survey topographic base maps of the area and on aerial photos.Coverages were created using ArcMap distributed by ESRI, Inc.Metadata was compiled to meet Federal Geographic Data Committee standards.Digital hydrology and topography of the map area is included with this publication release but documented in a separate matadata file.This dataset includes 3 layers.Each layer is listed and described in the metadata under the headings "Entity_Type_Label."Layers include:
kavik_Q_units		polygons representing geologic units
kavik_Q_structure	line symbols representing structures
kavik_Q_contacts	line symbols representing contacts between geologic units
  1. How should this data set be cited?

    Carson, E.C., 2009, Surficial-geologic map of the Kavik River area, west-central Mount Michelson Quadrangle, northeastern Brooks Range, Alaska: Report of Investigation RI 2009-3, Alaska Division of Geological & Gephysical Surveys, Fairbanks, Alaska.

    Other_Citation_Details: 1 sheet, scale 1:63,360

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -147.00000
    East_Bounding_Coordinate: -146.00000
    North_Bounding_Coordinate: 69.75000
    South_Bounding_Coordinate: 69.25000

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 2006
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: map, vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the 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: 0.99960
      Longitude_of_Central_Meridian: -147.0
      Latitude_of_Projection_Origin: 0.00001
      False_Easting: 500000.0
      False_Northing: 0.1

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.00001
      Ordinates (y-coordinates) are specified to the nearest 0.00001
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.25722210088.

  7. How does the data set describe geographic features?

    kavik_Q_units.shp
    vector, represents geologic formations (Source: Alaska Division of Geological & Geophysical Surveys)

    unit_name
    geologic unit (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    Qamodern stream alluvium
    Qacabandoned channel deposits
    Qafalluvial fan deposits
    Qatalluvial terrace deposits
    Qcccoarse-grained colluvium
    Qcffine-grained colluvium
    Qlslandslide deposits
    Qltthaw lake deposits
    Qdi2drift of Itkillik II age
    Qdi1drift of Itkillik I age
    Qdsdrift of Sagavanirktok River age
    Qdosoutwash of Sagavanirktok River age
    Qdadrift of Anaktuvuk River age
    Qduundifferentiated drift of Sagavanirktok and Anaktuvuk River age
    Qktkame terrace
    Qsusilt, undifferentiated
    Qtsthawed silt deposits

    kavik_Q_structure.shp
    vector, represents geologic structures (Source: Alaska Division of Geological & Geophysical Surveys)

    structure_type
    line, type of structure, determines symbology (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    ridge_crestridge crest
    ridge_crest_queriedridge crest, position queried
    scarpfault scarp

    kavik_Q_contacts.shp
    vector, represents contacts between geologic units (Source: Alaska Division of Geological & Geophysical Surveys)

    contact_type
    type of contact, determines symbology (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    inferredinferred contact


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 author would like to thank the staff of the Alaska Division of Geological & Geophysical Surveys, including P.R. Delaney, R.J. Gillis, A.M. Loveland, R.R. Reifenstuhl, R.F. Swenson, M.A. Wartes; and W.K. Wallace of the University of Alaska Fairbanks. Technical Review by: D.S.P. Stevens (ADGGS) and D.F. Waythomas (U.S. Geological Survey); Digital Cartography by: A.M. Loveland (ADDGS); Edited by: P.K. Davis and P.R. Delaney (ADGGS)

  3. To whom should users address questions about the data?


Why was the data set created?

This map is part of the Alaska Division of Geological and Geophysical Survey's Kavik River STATEMAP project in the Mount Michelson 1:250:000 Quadrangle. It provides a detailed overview of the surficial geology in the STATEMAP project area and will serve as a stand-alone publication (this publication). The resultant data will also be integrated into a subsequently released bedrock geologic map.


How was the data set created?

  1. From what previous works were the data drawn?

    Hamilton, 2003 (source 1 of 3)
    Hamilton, T.D., 2003, Surficial geology of the Dalton Highway (Itkillik-Sagavanirktok Rivers) area, southern Arctic Foothills, Alaska: Professional Paper PR 121, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: guide for unit descriptions and terminology for glaciations

    Pinney, 2000 (source 2 of 3)
    Pinney, D.S., 2000, Reconnaissance surficial-geologic map of the Sagavanirktok B-1 Quadrangle, eastern North Slope, Alaska: Report of Investigation RI 2000-1C, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska.

    Other_Citation_Details: 6 p., 1 sheet
    Type_of_Source_Media: paper
    Source_Contribution: guide for unit descriptions and terminology for glaciations

    Waythomas, 1991 (source 3 of 3)
    Waythomas, C.F., 1991, Surficial geologic maps of the Sagavanirktok A-1, A-2, and B-2 Quadrangles, northeastern Brooks Range, Alaska: Public Data File PDF 91-21A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska.

    Other_Citation_Details: 5p., 3 sheets, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Contribution: guide for unit descriptions and terminology for glaciations

  2. How were the data generated, processed, and modified?

    Date: 2006 (process 1 of 2)
    Aerial photograph interpretation - stereo pairs of ~1:63,360-scale, non-orthorectified, false-color infrared aerial photographs were used to initially map the surficial geology.These interpretations were then ground-checked in the map area and transferred onto a mylar sheet overlay of the 1:63,360-scale U.S. Geological Survey topographic base map. The mylar was overlaid on the air photos and then frequently positioned based on prominent features visible on both air photo and map (primarily streams). In the field numerous soil excavations were conducted to verify sediment characteristics. Moraines (primarily the Itkillik I and Itkillik II moraines) were measured in the field for the following properties to aid identification: moraine crest height, moraine crest width, moraine slope angle, and depth of soil oxidation.

    Data sources used in this process:

    • Hamilton, 2003
    • Pinney, 2000
    • Waythomas, 1991

    Date: 2006 (process 2 of 2)
    Digital cartography - The mylar overlay was scanned and georeferenced using ArcMap 9.2. Map boundaries were digitized on-screen at a scale more detailed than 1:63,360, using a USGS topographic 1:63,360 map layer that was created in All Topo to verify position. Surficial geology map polygons and lines were then digitized and attributed using ArcMap 9.2.

  3. What similar or related data should the user be aware of?


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

  1. How well have the observations been checked?

    The attributes of this geospatial data set consist of text identifiers and numeric codes that indicate the identity of the geologic unit or type of geologic feature and determine how each feature is symbolized.To check attribute accuracy, a color check plot was visually compared to the geologist's original compilation. Discrepancies between the digital geospatial dataset and the original analog or digital compilation were corrected as needed. The geologic interpretations presented in this report have undergone two technical reviews by geologists familiar with the subject of the report or geology of the map area. Reviewers' suggestions were incorporated into the final draft when deemed appropriate by the author.

  2. How accurate are the geographic locations?

    Contact locations and geologic unit distinctions where determined in the field using raster images of topographic base maps, aerial photos and handheld GPS units. Sources of possible error include the manual-visual proceedure used to resolve scale differences between the aerial photos and the topographic base maps and errors associated with digitization process. Inclusive of such errors, contacts are thought to be within 20-30 m of where they are mapped, with the exception of contacts which were specifically designated as "inferred."

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    The data set includes contact locations as observed in the field and distinguishable at a scale of 1:63,360.

  5. How consistent are the relationships among the observations, including topology?

    Polygon topology is present and clean on appropriate coverages.


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 data set are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
Use_Constraints:
Any hardcopies or published data sets utilizing these data sets 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 data sets, 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.

  1. Who distributes the data set? (Distributor 1 of 1)

    Alaska Division of Geological & Geophysical Surveys
    3353 College Road
    Fairbanks, Alaska 99709-3707
    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 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.
  2. What's the catalog number I need to order this data set?

    Report of Investigations 2009-3

  3. What legal disclaimers am I supposed to read?

    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.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 16-Mar-2009
Metadata author:
Alaska Division of Geological & Geophysical Surveys
3354 College Road
Fairbanks, Alaska 99709-3707

(907) 451-5020 (voice)
(907) 451-5000 (FAX)
dggspubs@alaska.gov

Hours_of_Service: 8 to 5 Monday through Friday
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.6 on Tue May 5 12:06:48 2009