Geologic map of the Kanayut River area, Chandler Lake Quadrangle, Alaska

Metadata also available as - [Parseable text] - [XML]

Frequently-anticipated questions:


What does this data set describe?

Title:
Geologic map of the Kanayut River area, Chandler Lake Quadrangle, Alaska
Abstract:
The Kanayut River area in the Chandler Lake Quadrangle, North Slope, Alaska, is located in the foothills of the Endicott Mountains. It is one of a series of areas selected for detailed mapping to document important structural and stratigraphic relationships at the mountain front of the east-central Brooks Range. This publication presents a geological map, cross section, correlation of map units, location index, and map unit descriptions.
Supplemental_Information:
The layers listed below are present as ArcGIS shape files. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribution_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Layers include:
attitudes			structural data such as strike and dip of bedding
beds				traceable beds
faults				fault traces
folds				fold axes
kan_inferred		inferred geologic contact
kancompgeo			geologic formations
kancompgeo_contacts contacts between geologic units
Kc					location of Coquinoid limestone occurrences
  1. How should this data set be cited?

    Harris, E.E., Peapples, P.R., Mull, C.G., and Lepain, D.L., 2009, Geologic map of the Kanayut River area, Chandler Lake Quadrangle, Alaska: Preliminary Interpretive Report PIR 2009-7, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -151.20000
    East_Bounding_Coordinate: -150.60000
    North_Bounding_Coordinate: 68.75000
    South_Bounding_Coordinate: 68.31000

  3. What does it look like?

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

    Beginning_Date: 2004
    Ending_Date: 2009
    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?

      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: 5
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -153
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000
      False_Northing: 0

      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 D_Clarke_1866.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

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

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

    ValueDefinition
    QaModern Alluvium
    QalAlluvium, Undifferentiated
    QuQuarternary units, undifferentiated
    QtgTerrace Gravel
    QcaColluvium/Alluvial Deposits
    QfFan Deposits, Undifferentiated
    QtTalus Rubble
    QsSolifluction Deposits
    QsiIce-Rich Silt Deposits
    QidDrift of Itkillik Age, Undifferentiated
    Qid3Drift of Latest Itkillik Readvance
    Qid2Drift of Itkillik Phase II
    Qid1Drift of Itkillik I Age
    QioOutwash of Itkillik Advance
    QsdDrift of Sagavanirktok River Age
    QsoOutwash of Late Sagavanirktok River Advance
    QadDrift of Anaktuvuk River Age
    QaoOutwash of Anaktuvuk River Advance
    TgdDrift of Gunsight Mountain Age
    KtuTuluvak Formation
    KsSeabee Formation
    KnuNanushuk Formation, upper part
    KnlNanushuk Formation, lower part
    KtoTorok Formation
    KfmFortress Mountain Formation
    KfmcCobblestone Member of the Fortress Mountain Formation
    KoOkpikruak Formation
    JPi/miImnaitchiak Chert and mafic igneous dikes
    Kc/KkBuchia Limestone Coquina and associated shales
    JTroOtuk Formation
    PsSiksikpuk Formation
    PMlLisburne Group
    MkKayak Shale
    MDksStuver Member of the Kanayut Conglomerate
    DkslShainin Lake Member of the Kanayut Conglomerate
    DkeEar Peak Member of the Kanayut Conglomerate
    DhfHunt Fork Shale

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

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

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

    ValueDefinition
    allochmajor thrust fault bounding structural provinces
    apx?backthapproximately located, queried backthrust
    apx?thrustapproximately located, queried thrust fault
    apx_allochapproximately located thrust fault bounding structural provinces
    dotdotted line representing a fault under Quaternary cover
    dot?allochconcealed, queried major thrust fault bounding structural provinces
    dot?backthconcealed, queried backthrust
    dot?detachconcealed, queried detachment
    dot?thrustconcealed, queried thrust fault
    dot_allochconcealed major thrust fault bounding structural provinces
    dot_redconcealed major thrust fault bounding structural provinces
    dot_thrustconcealed thrust fault
    thrustthrust fault
    l_lat_dotconcealed fault with left lateral sense of motion

    attitudes.shp
    point, represents strike and dip (Source: Alaska Division of Geological & Geophysical Surveys)

    strike
    strike of bedding (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:360

    dip
    dip of bedding (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:90

    type
    type of bedding attitude, determines symbology (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    inclinedinclined bedding
    verticalvertical bedding
    horizontalhorizontal bedding
    overturnedoverturned bedding
    approximateapproximate bedding attitude

    folds.shp
    vector, represents fold axes (Source: Alaska Division of Geological & Geophysical Surveys)

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

    ValueDefinition
    Fold Axistrace of axial plane and direction of plunge
    Synclineaxial trace of syncline
    Anticlineaxial trace of anticline
    Overturned anticlineaxial trace of overturned anticline
    Doubly overturned anticlineaxial trace of doubly overturned anticline

    beds.shp
    Vector, bedding traces visible at the surface. (Source: DGGS)

    kan_inferred.shp
    Vector, inferred geologic contacts (Source: DGGS)

    Kc.shp
    point, location of Coquinoid limestone occurrences (Source: DGGS)


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 Geologic Map was funded in part by the U.S. Geological Survey National Cooperative Geologic Mapping Program under assistance award number 03HQAG0055.

    Geologic field investigations by: C.G. Mull (1984-1985, 1989, 1999-2003); E.E. Harris (1985, 1999-2000, 2002-2003); P.R. Delaney (2002-2003); D.L. LePain (2000-2001, 2003); M.A. Wartes (2001-2002); R.R. Reifenstuhl (2003); P.A. Craw (2003); W.K. Wallace (2002); M.T. Whalen (2003); A.M. McCarthy (2001-2002); R.A. Kirkham (2000-2001); J.A. Dumoulin (2003); E.S. Finzel (2002-2003); K.D. Ridgway (2003); and R.R. Casavant (2003); D.A. Bodnar (1983); K.E. Adams (1984-1985); D.W. Houseknecht (2003).

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


Why was the data set created?

Local field studies by the Alaska Division of Geological & Geophysical Surveys (DGGS) began in the area in 1982 and continued intermittently in conjunction with other field studies. 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 to address specific structural and stratigraphic problems.


How was the data set created?

  1. From what previous works were the data drawn?

    USGS Chandler Lake B-2 (source 1 of 9)
    U.S. Geological Survey, 1971, Chandler Lake B-2 Quadrangle: U.S. Geological Survey, Reston, VA.

    Other_Citation_Details: scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: base map

    USGS Chandler Lake C-2 (source 2 of 9)
    U.S. Geological Survey, 1971, Chandler Lake C-2 Quadrangle: U.S. Geological Survey, Reston, VA.

    Other_Citation_Details: scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: base map

    Broge and others, 1979 (source 3 of 9)
    Broge, W.P., Reiser, H.N., Dutro, J.T., and Nilsen, T.H., 1979, Geologic map of Devonian rocks in parts of the Chandler Lake and Killik River quadrangles, Alaska: U.S. Geological Survey Open-file Report OF 79-1224.

    Other_Citation_Details: scale 1:200,00
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 200000
    Source_Contribution: geologic mapping

    Chapman and others, 1964 (source 4 of 9)
    Chapman, R.M., Detterman, R.L., and Mangus, M.D., 1964, Geology of the Killik-Etivluk Rivers Region, Alaska: U.S. Geological Survey Professional Paper P 303-F.

    Other_Citation_Details: p. 325-407, 7 sheets, scale 1:125,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: geologic mapping

    Mull and others, 2009 (source 5 of 9)
    Mull, C.G., Harris, E.E., Delaney, P.R., and Swenson, R.F., 2009, Geology of the Cobblestone Creek-May Creek area, east-central Brooks Range Foothills, Alaska: Preliminary Interpretive Report PIR 2009-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska.

    Online Links:

    Other_Citation_Details: 40 p., 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: geologic mapping

    Mull and Sonneman, 1974 (source 6 of 9)
    Mull, C.G., and Sonneman, H.S., 1974, Reconnaissance geologic map of the Chandler Lake Quadrangle - unpublished manuscript map: Exxon Co, USA, USA.

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

    Patton and Tailleur, 1964 (source 7 of 9)
    Patton, W.W., and Tailleur, I.L., 1964, Geology of the Killik-Itkillik region, Alaska: U.S. Geological Survey Professional Paper P 303G.

    Other_Citation_Details: p. 409-500
    Type_of_Source_Media: paper
    Source_Contribution: geologic mapping

    Peapples and others, 2007 (source 8 of 9)
    Peapples, P.R., Wallace, W.K., Wartes, M.A., Swenson, R.F., Mull, C.G., Dumoulin, J.A., Harris, E.E., Finzel, E.F., Reifenstuhl, R.R., and Loveland, A.M., 2007, Geologic map of the Siksikpuk River area, Chandler Lake Quadrangle, Alaska: Perliminary Interpretive Report PIR 2007-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: geologic mapping

    Hamilton, 1979 (source 9 of 9)
    Hamilton, T.D., 1979, Surficial geologic map of the Chandler Lake Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF 1121.

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

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

    Date: 2002 (process 1 of 4)
    Compilation of existing work - Geologic and structural information from published and unpublished mapping of the target region and adjacent regions was compiled.

    Data sources used in this process:

    • Broge and others, 1979
    • Chapman and others, 1964
    • Mull and others, 2009
    • Mull and Sonneman, 1974
    • Patton and Tailleur, 1964
    • Peapples and others, 2007
    • Hamilton, 1979

    Date: 2003 (process 2 of 4)
    Bedrock geologic mapping - During the summers of 2002 and 2003 DGGS conducted geologic field mapping of the bedrock units in the Kanyut River area. Geologists recorded observations on 1:63,360-scale topographic base maps and/or similarly scaled aerial photographs. Field notes and rock samples were collected at stations throughout the map area. Locations of sample sites and orientation measurement stations were confirmed using handheld GPS units. Geologists' observations were analyzed relative to the interpretations of previous workers and compiled onto a single mylar base map. Samples were collected for petrographic, age, and/or geochemical analysis.

    Data sources used in this process:

    • Broge and others, 1979
    • Chapman and others, 1964
    • Mull and others, 2009
    • Mull and Sonneman, 1974
    • Patton and Tailleur, 1964
    • Peapples and others, 2007
    • USGS Chandler Lake B-2
    • USGS Chandler Lake C-2

    Date: 2003 (process 3 of 4)
    Surficial geologic mapping - the surficial geologic mapping presented in this publication is a refinement of published, 1:250,000 scale mapping. The original acetate overlays used to produce the Hamilton, 1979, 1:250,000 scale map were individually scanned and orthorectified, using Orthomapper, and then georeferenced and superimposed, via ArcGIS, over orthorectified, photomosaiced and georeferenced 1:63,360 scale aerial photographs. The surficial unit contacts were then refined to reflect the 1:63,360 scale of this map. Areas which warranted further study were checked in the field.

    Data sources used in this process:

    • Hamilton, 1979

    Date: 2004 (process 4 of 4)
    Digital Cartography - The compilation mylar was scanned as a high-resolution tiff file, which was imported into ArcGIS 9.1 and geographically registered in UTM coordinates. Geologic polygons, linear features, and point data were digitized "on-screen" and attributed with appropriate supporting information. The surficial geology interpretaions were superimposed over the map units defined in the bedrock mapping and the datasets were merged. All final map layout and editing was done in Adobe Illustrator, Version CS2.

    Data sources used in this process:

    • USGS Chandler Lake B-2
    • USGS Chandler Lake C-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?

    Geologic point, line, and polygon data were mapped in the field using color infrared aerial photographs at a scale of approximately 1:63,360 and topographic maps at scales of 1:63,360 and larger. Feature attributes were verified by the geologists who conducted the field observations. To check attribute accuracy, a 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 one technical review by a geologist familiar with the subject of the report and the geology of the map area. The reviewer's suggestions were incorporated into the final draft when deemed appropriate by the authors.

  2. How accurate are the geographic locations?

    Locations were determined in the field using visual identification of land forms, rivers and creeks, and other physiographic features on topographic base maps and with hand-held Garmin GPS units. The positional accuracy of features which were visually identified is not precisely knowable, but thought to be accurate within 5 meters in areas of high topographic relief and good rock exposure. The error is possibly more (not more than 15-20 meters) in very low relief and/or highly vegetated terrain. The estimated positional error calculated by the GPS units was not recorded but is thought to be less than 5 meters. 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. Summing up all the above potential horizontal errors, the average potential horizontal error for bedrock geologic map features is estimated to be less than 20 meters.

  3. How accurate are the heights or depths?

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

    This data set includes field and air photo observations distinguishable at a scale of 1:63360. It includes geospatial information about beds traceable on air photos and/or in the field. The dataset displays: geologic units and contacts; inferred geologic contacts; fold and fault traces; strike, dip, and fold axis attitude. Samples were collected for petrographic, age, and/or geochemical analysis. The degree to which analytical data was utilized in developing the geologic interpretations presented in this report is unknown. This dataset does not include point locations of samples collected.

  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 topologically validated using the ESRI ArcGIS 9.0 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 data set are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
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)

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    Natural Resource Technician
    3354 College Road
    Fairbanks, AK 99709-3707

    907-451-5020 (voice)
    907-451-5050 (FAX)
    dggspubs@dnr.state.ak.us

    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?

    Preliminary Interpretive Report 2009-7

  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: 30-Jan-2009
Metadata author:
State of Alaska, Division of Geological & Geophysical Surveys
c/o Simone Montayne
Metadata manager
3554 College Road
Fairbanks, AK 99709
USA

(907) 451-5010 (voice)
(907) 451-5050 (FAX)
dggspubs@dnr.state.ak.us

Hours_of_Service: 8 to 4:30, Monday through Friday
Contact_Instructions:
Please address all comments or questions to the e-mail address given above whenever possible.
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.6 on Tue Aug 25 13:32:15 2009