Geologic map of the Kavik River area, northeastern Brooks Range, Alaska

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Frequently-anticipated questions:


What does this data set describe?

Title:
Geologic map of the Kavik River area, northeastern Brooks Range, Alaska
Abstract:
The 1:63,360 Kavik River geologic map area consists of ~620 square miles and ties together previous DGGS mapping in the Sadlerochit and Shublik Mountains area of the western Arctic National Wildlife Refuge (ANWR) on the east and the structurally complex foothills and mountain front near the Kemik gas accumulation on the west. The map area exposes a unique intersection of North Slope stratigraphy where all three major depositional megasequences are mappable in close association (Ellesmerian, Beaufortian, and Brookian).
Supplemental_Information:
The layers listed below are present as ArcGIS shapefiles. 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 won heading starting "Entity_Type_Label." Basic unit information is also included in the booklet that accompanies this map. Layers include:
kavik_units: geology polygons
kavik_contacts: geologic contacts
border: geologic map boundary
kavik_faults: fault traces
kavik_folds: axial trace of folds
kavik_structure_data: strike and dip of bedding
kavik_section_lines: cross section locations (cross sections are depicted in companion publication RI 2011-XB)
kavik_Q_polygons: Quaternary geologic polygons
kavik_Q_contact: Quaternary geologic contacts
kavik_Q_structure: Quaternary moraines
  1. How should this data set be cited?

    Wartes, M.A., Wallace, W.K., Loveland, A.M., Gillis, R.J., Decker, P.L., Reifenstuhl, R.R., Delaney, P.R., LePain, D.L., and Carson, E.C., 2011, Geologic map of the Kavik River area, northeastern Brooks Range, Alaska: Report of Investigations RI 2011-3A, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.

    Online Links:

    Other_Citation_Details: 14 p., 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: 69.721263
    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: 2011
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: vector digital data

  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: 0.99960
      Longitude_of_Central_Meridian: -147.0
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000.0
      False_Northing: 0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000001
      Ordinates (y-coordinates) are specified to the nearest 0.000001
      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_units.shp
    vector, represents geologic formations (Source: Alaska Division of Geological & Geophysical Surveys)

    unit_name
    A unique two to five letter abbreviation given to each map unit represented on the map (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:Geologic Map of the Kavik River Area, northeastern Brooks Range, Alaska
    Codeset Source:This report

    border.shp
    vector, represent the outline of the map area (Source: Alaska Division of Geological & Geophysical Surveys)

    Area
    represents the map area in square meters (Source: State of Alaska Division of Geological & Geophysical Surveys)

    Area represents the map area in square meters

    kavik_folds.shp
    vector, represents fold axial traces (Source: Alaska Division of Geological & Geophysical Surveys)

    fold_type
    defines type of fold (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    seis_sclsycline, derived from seismic interpretation
    seis_aclanticline, derived from seismic interpretation
    scl_slsyncline with steep limb, double arrow on steep limb
    scl_minorsyncline, minor scale
    scl_cosyncline, covered
    scl_apxsyncline, approximately located
    sclsyncline
    ot_scl_sloverturned syncline with a steep limb; double arrow on steep limb
    ot_scloverturned syncline
    ot_acl_cooverturned anticline, covered
    ot_acloverturned anticline
    mono_slmonocline with steep limb; double arrow represents steep limb
    mono_comonocline, covered
    acl_slanticline with steep limb; double arrow on steep limb
    acl_minoranticline, minor scale
    acl_coanticline, covered
    aclanticline
    A_scl_slapproximately located syncline with steep limb; double arrow on steep limb
    A_acl_slapproximately located anticline with steep limb; double arrow on steep limb
    A_sclapproximately located syncline
    A_mono_slapproximately located monocline with steep limb; double arrow on steep limb
    A_aclapproximately located anticline

    kavik_faults.shp
    vector, represents fault traces (Source: Alaska Division of Geological & Geophysical Surveys)

    fault_type
    defines type of fault (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    A_seis_thrustapproximately located thrust fault derived from seismic interpretation
    A_thrustapproximately located thrust fault
    A_transverseapproximately located transverse fault
    thrustthrust fault
    transversetransverse fault

    kavik_contacts.shp
    vector, geological map unit contacts/boundaries (Source: Alaska Division of Geological & Geophysical Surveys)

    contact_ty
    defines type of contact (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    approxapproximately located contact
    approx_qapproximately located, queried contact
    coveredcovered contact
    NULLcontact (represented with solid line indicating high degree of certainty)

    kavik_section_lines.shp
    cross section and seismic section lines (Source: Alaska Division of Geological & Geophysical Surveys)

    line_id
    defines the cross section and/or seismic line (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    Line W (EP-28)Line W portion derived from seismic line EP-28
    Line C (ARCO80-06)Line C portion derived from seismic line ARCO80-06
    Line E (EP-27)Line E portion from seismic line EP-27
    Line Wsurface section Line W
    Line Csurface section Line C
    Line Esurface section Line E

    kavik_Q_polygons.shp
    Quaternary geologic units (Source: Alaska Division of Geological & Geophysical Surveys)

    unit
    Quaternary geological unit type (abbreviations for Quaternary units can be found on the map sheet and booklet for this report.Units were simplified from Carson, 2009) (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:Geologic Map of the Kavik River Area, northeastern Brooks Range, Alaska
    Codeset Source:This report

    kavik_Q_contact.shp
    contacts between Quaternary geologic units (degree of certainty of contact is not indicated on this map; all Quaternary contacts are represented as solid lines) (Source: Carson, E.C., 2009, Surficial-geologic map of the Kavik River area, west-central Mount Michelson Quadrangle, northeastern Brooks Range, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2009-3, 1 sheet, scale 1:63,360.)

    contact_ty
    contact type (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    <Null>All Quaternary contacts were taken from Carson, 2009

    kavik_structure_data.shp
    strike and dip data (Source: Alaska Division of Geological & Geophysical Surveys)

    station
    station location where structural data was collected (Source: Alaska Division of Geological & Geophysical Surveys)

    Geologist-defined value consisting of a 2-digit year, 2- or 3-digit geologist initials, and 3-digit station id number, except where the value is wkw_2010 (which indicates a 3-digit geologist initials and a 4-digit year

    latitude
    latitude of station (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:69.25037
    Maximum:69.65401
    Units:decimal degrees
    Resolution:0.00001

    longitude
    longitude of station (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:-146.02820
    Maximum:-146.99442
    Units:decimal degrees
    Resolution:0.00001

    structure_
    structure type (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    beddinginclined bedding
    bedding_horizontalhorizontal bedding
    otoverturned bedding

    strike_rhr
    strike of bedding using right-hand-rule convention (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:3
    Maximum:347
    Units:degrees

    dip
    dip or incline of bedding relative to horizontal (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:3
    Maximum:89
    Units:degrees

    kavik_Q_structure.shp
    Quaternary structures (Source: Alaska Division of Geological & Geophysical Surveys)

    structure_
    type of Quaternary structure (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    ridge_crestridge crest, moraine
    ridge_crest_queriedridge crest/moraine, queried


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?

    Geologic mapping was supported in part by the STATEMAP program under award number 06HQAG0024, administered by the U.S. Geological Survey.Additional funding was provided through a Capital Improvement grant from the State of Alaska.Field studies were also supported by a consortium of sponsors including Conoco Phillips, Anadarko, ENI, Petro-Canada, BG Alaska, FEX, Pioneer Natural Resources, and Shell.

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    3354 College Road
    Fairbanks, AK 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.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?

In recent years, interest in hydrocarbon exploration in the Brooks Range foothills has increased considerably, resulting in an opportunity to compile previous studies as well as to carry out additional field studies. Various topical studies and geological mapping in the Kavik River area by DGGS and collaborating agencies is an ongoing effort to address specific structural and stratigraphic problems along the northern foothills of the northeastern Brooks Range.


How was the data set created?

  1. From what previous works were the data drawn?

    Bader and Bird, 1986 (source 1 of 1)
    Bader, J.W., and Bird, K.J., 1986, Geologic map of the Demarcation Point, Mt. Michelson, Flaxman Island, and Barter Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigations Map I 1791.

    Other_Citation_Details: 1 sheet, scale 1:250,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: regional geologic mapping

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

    Date: 2006 (process 1 of 2)
    Map Compilation - Geologic mapping took place during the 2006 field season. Mappers recorded observations in field notebooks and on aerial photos and topographic maps, predominantly at 1:63,360 scale. Bedrock mapping involved using aerial photographs and topographic maps on a daily basis for checking geologic contacts and units. All compilations were made by hand on stable, registered mylar at 1:63,360 scale. Stations were located using aerial photos, topographic maps, and in most instances, GPS devices were used. Data stations were also plotted by hand on stable mylar topographic bases and coordinates determined by digitizing. Data were compiled on a single layer of stable, registered mylar at 1:63,360 scale. The mylar was then scanned and digitized.

    Data sources used in this process:

    • Bader and Bird, 1986

    Date: 2011 (process 2 of 2)
    Digital Cartography - The compilation mylar was scanned as a high-resolution .tiff file, which was imported into ArcGIS 9.2 and geographically registered in UTM coordinates (see spatial reference information below).Geologic polygons, linear features, and point data were digitized "on-screen" and attributed with appropriate supporting information.Editing and quality control checks took place at every process step. All final map layout and editing was done in Adobe Illustrator, Version CS2.

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

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

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360


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

  1. How well have the observations been checked?

    Geologic point, line, and polygon data were determined in the field or on air photos at a scale of approximately 1:63,360 and topographic maps at scales of 1:63,360 and larger. Feature attributes were checked by the geologists who conducted the field observations. To check attribute accuracy, a check plot was visually compared to the geologist's original map 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. All surficial-geologic contacts are represented by a solid line on the printed map. Surficial-geologic units were simplified from Carson, 2009, users should refer to the originating publication for additional information about the surficial-geology of this map area.

  2. How accurate are the geographic locations?

    Locations were determined in the field using raster images of topographic base maps and Garmin GPS units. The estimated positional error calculated by the GPS unit was not recorded. Bedrock geologic map data also have a horizontal positional accuracy dependent on the "on-screen" method of digital cartography. Map error is induced by: (1) transferring map data from base topography to a mylar compilation map, with an estimated potential error due to a pen line width of approximately 0.001 inches being equivalent to approximately 1.5 meters on the ground; (2) the digitizing RMS error (30 control points on a regular grid have an average RMS error of 14.0 meters on the ground; individual control point error ranges from 2.9 to 24.0 meters on the ground); and (3) the accuracy of the human operator digitizing the geologic line work from the topographic base map, with an estimated error due to a pen line width of approximately 0.001 inches being equivalent to approximately 1.5 meters on the ground. The average potential horizontal error for bedrock geologic map features is estimated to be approximately 15 meters.

  3. How accurate are the heights or depths?

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

    This dataset includes geospatial information about beds traceable on air photos and/or in the field. The dataset displays: geologic units and contacts; fold and fault traces; strike, dip, and fold axis attitude; man made infrastructure such as airstrips, roads, etc.; point elevations digitized from the raster map; and wells.Vector base map is from Carson, 2009.

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

    Polygon topology is present and clean on the originating geospatial dataset. All polygon features were were topologically validated using the ESRI ArcGIS 9.2 software prior to export to shape file format. The logical consistency of the point and line files has been visually checked but not systematically verified.


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 are 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. 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.

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    3354 College Road
    Fairbanks, AK 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.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?

  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?

  5. Is there some other way to get the data?

    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 over the counter by mail, phone, fax, or email from the DGGS Fairbanks office.Turn around 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 a exact shipping ammount.


Who wrote the metadata?

Dates:
Last modified: 16-Nov-2011
Metadata author:
Metadata manager
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
Fairbanks, AK 99709-3707
USA

907-451-5020 (voice)

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.6 on Wed Nov 16 14:36:35 2011