The Alaska Geological Materials Center Inventory

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Frequently anticipated questions:


What does this data set describe?

Title: The Alaska Geological Materials Center Inventory
Abstract:
The Alaska Geologic Materials Center (GMC) in Eagle River holds non-proprietary rock core and cuttings that represent over 13 million feet of exploration and production drilling in Alaska. Additionally, the collection holds more than 252,000 linear feet of diamond-drilled hard-rock mineral core, representing more than 1,800 exploratory boreholes; 76,000 linear feet of oil and gas core and rock samples from more than 1,650 exploratory or production wells; samples for geotechnical boreholes; and numerous surface rock and sediment samples. The collection also includes extensive geochemical data and processed material derived from this rock. This publication represents the GMC inventory in accessible, intuitive digital formats for use by the general public.
Supplemental_Information:
The GMC inventory is available as a Keyhole Markup Language (KML) file, an international standard used by the Open Geospatial Consortium and can be viewed with Google Earth, NASA World Wind, or Microsoft Bing Maps 3D geobrowsers . Attribute information for the following files is included in this metadata file under the "Entity_and_Attribute_Information" section. GMC oil and gas and "hard-rock" mineral inventory summaries are also included as Portable Document Format (PDF) files. Files include:
Alaska-GMC-Inventory (KML)
Alaska-GMC-Oil-Gas-Summary (PDF)
Alaska-GMC-Minerals-Summary (PDF)
  1. How should this data set be cited?

    Johnson, K.J., Riordan, J.A., Papp, K.R., Johnson, K.A., Skutca, J.E., Mansavage, H.L., and Hartman, D., 20100409, The Alaska Geological Materials Center Inventory: None None, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Eagle River, Alaska - USA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -130.0
    East_Bounding_Coordinate: 179.0
    North_Bounding_Coordinate: 72.0
    South_Bounding_Coordinate: 50.0

  3. What does it look like?

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

    Beginning_Date: 09-Apr-2010
    Ending_Date: Present
    Currentness_Reference: On-going development

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

    Geospatial_Data_Presentation_Form: document, 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?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001 degree. Longitudes are given to the nearest 0.000001 degree. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is WGS 1984.
      The ellipsoid used is WGS 1984.
      The semi-major axis of the ellipsoid used is 6356752.3142.
      The flattening of the ellipsoid used is 1/298.257224.

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    The GMC materials inventory KML file contains four main folders: Alaska Core Inventory, Geologic Materials Center Information, the Alaska Inventory Legend, and Geologic Overlays for Alaska. The list of detailed descriptions below will describe the contents of first three folders listed above. The latter folder contains KML layers related to the Alaska Resource Data File (U.S. Geological Survey, 2008) and the Historical Mining Regions and Districts of Alaska (Sturmann and Clement, 1993) and are documented elsewhere (see the "Online_Linkage" entries in the "Lineage" section). The GMC inventory is updated continuously and, as a result, the main GMC inventory KML file utilizes network links to call and load the individual well and prospect layers over the Internet. This methodology allows the user to always have the most current GMC inventory information. As a result, an Internet connection is required to view each layer and load the inventory data.
    Entity_and_Attribute_Detail_Citation: None
    Materials Inventory (Main Folder 1 of 4)
    Inventory summary of oil and gas and "hard-rock" minerals material at the GMC. This folder contains two network subfolders: Alaska Oil & Gas Well Summary and Alaska Mineral Borehole Summary (Source: Alaska Geological Materials Center)

    Alaska Oil & Gas Well Summary (Materials Inventory Sub-folder 1 of 5)
    Inventory summary of oil and gas materials at the GMC. Click the folder link to download a PDF version of the oil and gas inventory summary. Check/uncheck the option box to enable/disable the layer. Users may open the Alaska Oil & Gas Well Summary folder and press Ctrl-F (Windows) or Cmd-F (Mac) keys to search well names only. (Source: Alaska Geological Materials Center)

    Alaska Oil & Gas Well Summary Header (Placemark)
    Inventory summary of a given oil and gas well at the GMC. Click on the red and black dot at each well location to view the summary balloon. (Source: Alaska Geological Materials Center)

    Well Name
    AOGCC listed well name (Source: Alaska Oil and Gas Conservation Commission)

    Formal codeset
    Codeset Name:AOGCC_DataExtract.zip
    Codeset Source:AOGCC <http://doa.alaska.gov/ogc/publicdb.html>

    Mystery Dot
    Single <li> HTML tag to force underlined links in the KML placemark balloon (Source: Alaska Geological Materials Center)

    A bug in Google Earth can disable HTML links in the placemark balloon from being shown as underlined. Placing a single <li> tag in the markup seems to ensure that all links are underlined.

    API
    A unique, permanent, numeric identifier assigned to each well drilled for oil and gas in the United States. (Source: American Petroleum Institute)

    Example: 42-501-20130-03-00. The "42" means that this well is located in "State Code" 42 which is Texas. The "501" means that this well is located in "County Code" 501 which is Yoakum County. The "20130" is a "Unique Well Identifier" within the county. The "03" is the "Directional Sidetrack Code" for wells that have been sidetracked. The "00" is the "Event Sequence Code" to indicate how many operations have taken place (i.e. redrill).

    Operator
    AOGCC listed operator of the well (Source: Alaska Oil and Gas Conservation Commission)

    Formal codeset
    Codeset Name:AOGCC_DataExtract.zip
    Codeset Source:AOGCC <http://doa.alaska.gov/ogc/publicdb.html>

    Well Permit
    AOGCC permit number with links to AOGCC website (Source: Alaska Oil and Gas Conservation Commission)

    Unique well permit number.

    Total Depth
    Total depth of well (TD). (Source: Alaska Oil and Gas Conservation Commission)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Vertical Depth
    True Vertical Depth of well (TVD). Vertical distance from Kelly Bushing (KB), in feet. Requires a directional survey if hole is deviated. (Source: Alaska Oil and Gas Conservation Commission)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Completion Date
    AOGCC well drilling completion date (Source: Alaska Oil and Gas Conservation Commission)

    Date in MM/DD/YYYY format.

    Area
    AOGCC basin or area for well (Source: Alaska Oil and Gas Conservation Commission)

    Formal codeset
    Codeset Name:AOGCC_DataExtract.zip
    Codeset Source:AOGCC <http://doa.alaska.gov/ogc/publicdb.html>

    Digital Well Logs
    Well logs available in digital (LAS) format <http://www.cwls.org/las_info.php> from the AOGCC. Digital well logs are not currently available for all wells. (Source: Alaska Oil and Gas Conservation Commission)

    File in LAS, Log ASCII Standard, format. File name prefix is "DigLog," followed by the well area, then the well API number (see above).

    Oil & Gas Summary Explanation
    Link to a brief explanation of this entity type label (Source: Alaska Geological Materials Center)

    Online HTML version of the oil and gas summary explanation <http://dggs.alaska.gov/gmc_inventory/google_earth/html/oilandgas-summary-meta.html>

    Reality Check
    Link to a web page regarding advice and inventory data limitations (Source: Alaska Geological Materials Center)

    Online HTML version of the GMC Materials Use Advisory <http://dggs.alaska.gov/gmc_inventory/google_earth/html/gmc_advisory.html>

    Alaska Oil & Gas Well Summary Table
    Inventory summary of oil and gas well materials at the GMC (Source: Alaska Geological Materials Center)

    Materials Details
    Types of material available at the GMC (Source: Alaska Geological Materials Center)

    ValueDefinition
    CoreUnprocessed sample material
    CuttingsWashed/unwashed sample material
    ApatiteProcessed slides
    ClayProcessed slides
    ForaminiferaProcessed slides
    Heavy MineralsProcessed slides
    KerogenProcessed slides
    NannoplanktonProcessed slides
    PalynologyProcessed slides
    ResiduesProcessed residuals
    Siliceous FossilsProcessed slides
    Thin SectionsProcessed slides
    VitriniteProcessed mounts
    Formation Top PicksList of geologic formations through which the well was drilled.

    Top
    Topmost (shallowest) well interval having available sample material (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Bottom
    Bottommost (deepest) well interval having available sample material (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Count
    Count of unprocessed/processed well material over a given depth range having inventoried samples for a given well (Source: Alaska Geological Materials Center)

    Number could represent boxes, slides, bags of cuttings, etc.

    GMC Data Report Title(s) for Well
    Link to downloadable GMC publications containing analytical and interpretive data for a given well (Source: Alaska Geological Materials Center)

    <http://www.dggs.alaska.gov/pubs/pubs?reqtype=series&abbrevID=276> Reports of this series contain analytical and interpretive data resulting from testing by third parties on material borrowed from sample materials housed at the Alaska Geologic Materials Center. These reports are produced by the third party agency or company that conducted the sampling and analysis. The reports have not undergone technical peer review and should not be used or cited as reviewed data.

    Alaska Oil & Gas Well Inventory Details Header
    Inventory details of oil and gas materials at the GMC (Source: Alaska Geological Materials Center)

    Well Name
    AOGCC listed well name (Source: Alaska Oil and Gas Conservation Commission)

    Formal codeset
    Codeset Name:AOGCC_DataExtract.zip
    Codeset Source:AOGCC <http://doa.alaska.gov/ogc/publicdb.html>

    API
    A unique, permanent, numeric identifier assigned to each well drilled for oil and gas in the United States. (Source: American Petroleum Institute)

    Example: 42-501-20130-03-00. The "42" means that this well is located in "State Code" 42 which is Texas. The "501" means that this well is located in "County Code" 501 which is Yoakum County. The "20130" is a "Unique Well Identifier" within the county. The "03" is the "Directional Sidetrack Code" for wells that have been sidetracked. The "00" is the "Event Sequence Code" to indicate how many operations have taken place (i.e. redrill).

    Intervals
    Count of unprocessed/processed well material over a given depth range having inventoried samples for a given well (Source: Alaska Geological Materials Center)

    Number could represent boxes, slides, bags of cuttings, etc.

    Details Explanation
    Link to a brief explanation of this entity type label (Source: Alaska Geological Materials Center)

    Online HTML version of the oil and gas details explanation <http://dggs.alaska.gov/gmc_inventory/google_earth/html/oilandgas-details-meta.html>

    Alaska Oil & Gas Well Inventory Details Table
    Inventory details of oil and gas well materials at the GMC (Source: Alaska Geological Materials Center)

    Form
    Type or kind of oil and gas material available in the inventory (Source: Alaska Geological Materials Center)

    ValueDefinition
    AugerAuger cutting: any washed or unwashed material cut by an auger bit in the process of well drilling and removed from the hole in the drilling mud.
    CannedCore or cuttings material stored in cans.
    Center-splitCore that has been physically split, as opposed to cut, down the center of its long axis.
    ChipsIrregularly shaped core pieces, approximately 1-2 cubic inches in size.
    Hand SampleAny hand sample taken from an outcrop.
    LithicIrregularly shaped core piece larger than a chip, but likely smaller than a hand sample.
    MixedMixed core and outcrop samples.
    OilFluid sample in a jar.
    PlugsCore plug, core of a core.
    Sidewall CoreCore or rock sample extracted from the wall of a drill hole.
    Slab-1/2Core cut down the long axis with a slabbing saw resulting in two symmetrical core halves.
    Slab-1/3Also known as rocker slab, the smaller section of core cut down the long axis that results in core slabs that are not symmetrical. The 1/3 portion of the core is typically used for archival purposes.
    Slab-2/3Also known as thick core slab or the butt half, the larger section of core cut down the long axis that results in core slabs that are not symmetrical. The 2/3 portion of the core is typically used for viewing and sampling purposes.
    Undetermined CoreKnown core sample, the type of which has not been verified
    Undetermined CuttingKnown cutting sample, the type of which has not been verified
    UnwashedUnwashed cuttings sample or "wet cuts" still coated in drilling muds.
    WashedWashed cuttings sample or "dry cuts" derived from washing/rinsing away the drilling muds.
    WaterWater fluid sample.
    WholeWhole core: cylindrical section of unprocessed material (i.e. not cut or slabbed), up to several meters in length, taken by a core bit and brought to the surface for examination and/or analysis.

    Source
    Original material used for a given processed preparation method. Example: palynology slide processed from core (original material). (Source: Alaska Geological Materials Center)

    ValueDefinition
    CoreCylindrical section of unprocessed material, up to several meters in length, taken by a core bit and brought to the surface for examination and/or analysis.
    CuttingAny washed or unwashed material cut by a bit in the process of well drilling and removed from the hole in the drilling mud.
    OtherMicro-paleo picked slide (usually forams)
    OutcropSamples originating from exposed rock at the surface.
    ResidueRemaining material after laboratory analysis or sampling.
    Sidewall CoreCore or rock sample extracted from the wall of a drill hole.

    Top
    Topmost (shallowest) well interval having available sample material (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Bottom
    Bottommost (deepest) well interval having available sample material (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Donor
    The source of the well materials (Source: Alaska Geological Materials Center)

    ValueDefinition
    AOGCCAlaska Oil and Gas Conservation Commission
    AMOCOAmoco Corporation, originally Standard Oil Company (Indiana)
    ARCOAtlantic Richfield Company
    BLMBureau of Land Management
    BPBP Exploration (Alaska)
    ChevronChevron Corporation
    ConocoPhillipsConocoPhillips Company
    CIRICook Inlet Region, Inc.
    ForestForest Oil Corporation
    GMCAlaska Geologic Materials Center
    MarathonMarathon Oil Corporation
    MicropaleoMicropaleo Consultants Inc.
    OXYOccidental Petroleum Corporation
    PhillipsPhillips Petroleum
    ShellShell Oil Company, the United States-based subsidiary of Royal Dutch Shell
    UNOCALUnion Oil Company of California
    USGSUnited States Geological Survey
    USGS (Tailleur)United States Geological Survey (Irv Tailleur collection)
    USMMSUnited States Minerals Management Service

    Fifth Column
    Multipurpose column of information, the contents of which depend on the material type (Source: Alaska Geological Materials Center)

    ValueDefinition
    CoreColumn is unused if the type is "core"
    CuttingsColumn may have intervals if the type is "cuttings"
    ResiduesColumn may have a comment if the type is "residues"
    All other materialsColumn may have a year indicating when the age of the material

    Reality Check
    Link to a web page regarding advice and inventory data limitations (Source: Alaska Geological Materials Center)

    Online HTML version of the GMC Materials Use Advisory <http://dggs.alaska.gov/gmc_inventory/google_earth/html/gmc_advisory.html>

    Alaska Oil & Gas Well Formation Top Picks Header
    Inventory details of oil and gas formation top picks provided by the GMC (Source: Alaska Geological Materials Center)

    Well Name
    AOGCC listed well name (Source: Alaska Oil and Gas Conservation Commission)

    Formal codeset
    Codeset Name:AOGCC_DataExtract.zip
    Codeset Source:AOGCC <http://doa.alaska.gov/ogc/publicdb.html>

    API
    A unique, permanent, numeric identifier assigned to each well drilled for oil and gas in the United States. (Source: American Petroleum Institute)

    Example: 42-501-20130-03-00. The "42" means that this well is located in "State Code" 42 which is Texas. The "501" means that this well is located in "County Code" 501 which is Yoakum County. The "20130" is a "Unique Well Identifier" within the county. The "03" is the "Directional Sidetrack Code" for wells that have been sidetracked. The "00" is the "Event Sequence Code" to indicate how many operations have taken place (i.e. redrill).

    Picks
    Count of unique geologic formations associated with a given well (Source: Alaska Geological Materials Center)

    Number represents unique geologic formations, undetermined horizons, major units, or significant geologic packages, based upon the given source.

    Details Explanation
    Link to a brief explanation of this entity type label (Source: Alaska Geological Materials Center)

    Online HTML version of the oil and gas details explanation <http://dggs.alaska.gov/gmc_inventory/google_earth/html/oilandgas-details-meta.html>

    Formation Top Downloads
    Link to downloadable formation top picks files. (Source: Alaska Geological Materials Center)

    Formation top picks related to the GMC's material inventory are also available in PDF and Microsoft Excel spreadsheet formats on the GMC Inventory web page <http://dggs.alaska.gov/gmcinventory>.

    KB Elevation (ft)
    Vertical distance, in feet, above mean sea level of the reference (zero point) for depth measurements. KB elevation can be rig floor or ground level in a few cases, but usually it is the Kelly Bushing. Source is listed after the depth. (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Alaska Oil & Gas Well Formation Top Picks Details Table
    Inventory details of oil and gas well materials at the GMC (Source: Alaska Geological Materials Center)

    Horizon
    Formation name, permafrost layer, "other," or total depth (TD) for well bottom provided. "Other" could be measured depth to an undetermined horizon, major unit, or significant geologic package. (Source: Alaska Geological Materials Center)

    Formal geologic formation names, depth to permafrost, or undetermined significant geological layers, according to the given source. A list of the formations associated with the GMC inventory are provided in PDF and Microsoft Excel spreadsheet formats on the GMC Inventory web page <http://dggs.alaska.gov/gmcinventory>.

    MD (ft)
    Measured depth of formation tops (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Data Source
    Data sources for the geologic formation top picks. (Source: Alaska Geological Materials Center)

    Formal list sources are provided in this metadata in the "Lineage" and "Process Step" sections.

    Comments
    A memo field that may describe the horizon (Source: Alaska Geological Materials Center)

    Notes or details offered to further clarify the horizon description.

    Terms
    List of definitions for unfamiliar acronyms shown in the table. (Source: Alaska Geological Materials Center)

    Brief acronym definitions which may benefit the user.

    Reality Check
    Link to a web page regarding advice and inventory data limitations (Source: Alaska Geological Materials Center)

    Online HTML version of the GMC Materials Use Advisory <http://dggs.alaska.gov/gmc_inventory/google_earth/html/gmc_advisory.html>

    Complete Oil and Gas Inventory PDF (Materials Inventory Sub-folder 2 of 5)
    Portable Document File containing a printable inventory summary of oil and gas materials at the GMC. This file can be downloaded only by clicking on the "Complete Oil and Gas Inventory PDF" folder link, shown within the "Materials Inventory" folder of the KML file. Restricting access to the PDF from within the KML file helps ensure the user is always downloading the most recent and up-to-date version of the PDF file. (Source: Alaska Geological Materials Center)

    API
    A unique, permanent, numeric identifier assigned to each well drilled for oil and gas in the United States. (Source: American Petroleum Institute)

    Example: 42-501-20130-03-00. The "42" means that this well is located in "State Code" 42 which is Texas. The "501" means that this well is located in "County Code" 501 which is Yoakum County. The "20130" is a "Unique Well Identifier" within the county. The "03" is the "Directional Sidetrack Code" for wells that have been sidetracked. The "00" is the "Event Sequence Code" to indicate how many operations have taken place (i.e. redrill).

    Well
    AOGCC listed well name and number (Source: Alaska Oil and Gas Conservation Commission)

    Formal codeset
    Codeset Name:AOGCC_DataExtract.zip
    Codeset Source:AOGCC <http://doa.alaska.gov/ogc/publicdb.html>

    Material
    Types of material available at the GMC (Source: Alaska Geological Materials Center)

    ValueDefinition
    CoreUnprocessed sample material
    CuttingsWashed/unwashed sample material
    DataReportIndexDownloadable GMC publications containing analytical and interpretive data for a given well
    ApatiteProcessed slides
    ClayProcessed slides
    ForaminiferaProcessed slides
    Heavy MineralsProcessed slides
    KerogenProcessed slides
    NannoplanktonProcessed slides
    PalynologyProcessed slides
    ResiduesProcessed residuals
    Siliceous FossilsProcessed slides
    Thin SectionsProcessed slides
    VitriniteProcessed mounts
    Well_PicksSignificant geologic formations through which the well was drilled.

    Top
    Topmost (shallowest) well interval having available sample material (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Bottom
    Bottommost (deepest) well interval having available sample material (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:23000
    Units:Feet

    Count
    Count of unprocessed/processed well material or unique formation names over a given depth range (Source: Alaska Geological Materials Center)

    Number could represent boxes, slides, boxes of cuttings, formation names, etc.

    Basin Name
    Oil or gas basin name (Source: Alaska Oil and Gas Conservation Commission)

    Formal oil or gas basin name or area in which the well was drilled. Name appears to the right of the well name. Source: AOGCC formal well header.

    Previous Well Name
    Old or previous oil or gas well name (Source: Alaska Oil and Gas Conservation Commission)

    Previous well name given to the oil or gas well. Listed for the benefit of the researcher.

    Latitude
    The latitude, in decimal degrees (dd.mmmm), of the well. (Source: Alaska Oil and Gas Conservation Commission)

    Range of values
    Minimum:50
    Maximum:72
    Units:Decimal degrees

    Longitude
    The longitude in decimal degrees (dd.mmmm), of the well. (Source: Alaska Oil and Gas Conservation Commission)

    Range of values
    Minimum:-130
    Maximum:179
    Units:Decimal degrees

    Mineral Borehole Summary (Materials Inventory Sub-folder 3 of 5)
    Inventory summary of "hard-rock" mineral materials at the GMC. Check/uncheck the option box to enable/disable the layer. Users may open the Alaska Mineral Borehole Summary folder and press Ctrl-F (Windows) or Cmd-F (Mac) keys to search prospect names only. (Source: Alaska Geological Materials Center)

    Mineral Borehole Summary Header (Placemark)
    Inventory summary of "hard-rock" mineral materials at the GMC. Click on the white and black dot at each prospect location to view the summary balloon. (Source: Alaska Geological Materials Center)

    Prospect Name
    GMC listed prospect name (Source: Alaska Geological Materials Center)

    Unique formal name for each prospect, usually defined in the United States Geological Survey Alaska Resource Data File.

    Mystery Dot
    Single <li> HTML tag to force underlined links in the KML placemark balloon (Source: Alaska Geological Materials Center)

    A bug in Google Earth can disable HTML links in the placemark balloon from being shown as underlined. Placing a single <li> tag in the markup seems to ensure that all links are underlined.

    Company
    Owner/consultant/drill company if available (Source: Alaska Geological Materials Center)

    Company managing the prospect or drilling process

    Location Type
    Type of geolocation for prospect (Source: Alaska Geological Materials Center)

    ValueDefinition
    Single ProspectAverage location of boreholes
    Prospects GroupRepresents average of two or more prospects
    Claim AreaCenter of claim area
    Area CentroidCenter of geographic area such as basin or island
    UnresolvedLatitude and longitude is unknown

    USGS ARDF #
    United States Geological Survey Alaska Resource Data File unique ID number (Source: United States Geological Survey)

    Unique label assigned to each site. First two letters comprise the quadrangle code, followed by a three digit number. Textual values of no more than 11 characters. See the formal ARDF metadata <http://tin.er.usgs.gov/metadata/ardf.faq.html> for more information.

    Alaska Mineral Prospect Summary Table
    Inventory summary of "hard-rock" mineral materials at the GMC (Source: Alaska Geological Materials Center)

    Borehole
    "-blank-" if empty or partial/full borehole number (Source: Alaska Geological Materials Center)

    Unique formal name for each borehole, usually a number or a combination of numbers and letters. Multiple boreholes can be associated with a given prospect.

    Top
    Topmost (shallowest) borehole interval having available sample material (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:10000
    Units:Feet

    Bottom
    Bottommost (deepest) borehole interval having available sample material (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:10000
    Units:Feet

    Box Count
    Number of intervals having inventoried samples for a given borehole (Source: Alaska Geological Materials Center)

    Number usually represents the number of boxes

    Core Size
    Generic references to core diameter (Source: Alaska Geological Materials Center)

    ValueDefinition
    E coreEstimated size 21.6/.85 (mm/in)
    A coreEstimated size 27.0/1.1 (mm/in)
    B coreEstimated size 36.5/1.4 (mm/in)
    N coreEstimated size 47.6/1.9 (mm/in)
    H coreEstimated size 63.5/2.5 (mm/in)
    P coreEstimated size 85.0/3.3 (mm/in)
    Mixed core sizesSeveral different core diameters
    OtherChips or hand samples

    Sample Type
    Description of the core or sample's current form (Source: Alaska Geological Materials Center)

    ValueDefinition
    WholeCore is not cut
    Half cutCore cut in half
    SplitCore cracked in half
    ChipsPea-gravel chips of unknown preparation
    ResidueCore fallen out of box
    MixedMixed core and hand samples
    HandHand samples
    EmptyCore box is empty

    GMC Data Report Title(s) for Prospect
    Link to downloadable GMC publications containing analytical and interpretive data for a given prospect (Source: Alaska Geological Materials Center)

    <http://www.dggs.alaska.gov/pubs/pubs?reqtype=series&abbrevID=276> Reports of this series contain analytical and interpretive data resulting from testing by third parties on material borrowed from sample materials housed at the Alaska Geologic Materials Center. These reports are produced by the third party agency or company that conducted the sampling and analysis. The reports have not undergone technical peer review and should not be used or cited as reviewed data.

    Mineral Summary Explanation
    Link to a brief explanation of this entity type label (Source: Alaska Geological Materials Center)

    Online HTML version of the mineral summary explanation <http://dggs.alaska.gov/gmc_inventory/google_earth/html/minerals-summary-meta.html>

    Reality Check
    Link to a web page regarding advice and inventory data limitations (Source: Alaska Geological Materials Center)

    Online HTML version of the GMC Materials Use Advisory <http://dggs.alaska.gov/gmc_inventory/google_earth/html/gmc_advisory.html>

    Alaska Minerals Borehole Core Details Header
    Inventory details of "hard-rock" minerals materials at the GMC (Source: Alaska Geological Materials Center)

    Prospect Name
    GMC listed prospect name (Source: Alaska Geological Materials Center)

    Unique formal name for each prospect, usually defined in the United States Geological Survey Alaska Resource Data File.

    Borehole #
    "-blank-" if empty or partial/full borehole number (Source: Alaska Geological Materials Center)

    Unique formal name for each borehole, usually a number or a combination of numbers and letters. Multiple boreholes can be associated with a given prospect.

    Company
    Owner/consultant/drill company if available (Source: Alaska Geological Materials Center)

    Company managing the prospect or drilling process

    Collection Type
    General source of core donation (Source: Alaska Geological Materials Center)

    ValueDefinition
    IndustryMinerals Industry
    Government AgencyFederal, state, and educational institutions
    GeothermalGeothermal projects
    EngineeringEngineering projects
    Fossil FuelsCoal fields

    Core Memo
    Description of core size and sample's current form, separated by a dash (options listed below) (Source: Alaska Geological Materials Center)

    ValueDefinition
    E coreEstimated size 21.6/.85 (mm/in)
    A coreEstimated size 27.0/1.1 (mm/in)
    B coreEstimated size 36.5/1.4 (mm/in)
    N coreEstimated size 47.6/1.9 (mm/in)
    H coreEstimated size 63.5/2.5 (mm/in)
    P coreEstimated size 85.0/3.3 (mm/in)
    Mixed core sizesSeveral different core diameters
    OtherChips or hand samples
    WholeCore is not cut
    Half cutCore cut in half
    SplitCore cracked in half
    ChipsPea-gravel chips of unknown preparation
    ResidueCore fallen out of box
    MixedMixed core and hand samples
    HandHand samples
    EmptyCore box is empty

    Box(es)
    Total box count available for hole (Source: Alaska Geological Materials Center)

    Number of boxes

    Details Explanation
    Link to a brief explanation of this entity type label (Source: Alaska Geological Materials Center)

    Online HTML version of the borehole core details explanation <http://dggs.alaska.gov/gmc_inventory/google_earth/html/minerals-details-meta.html>

    Alaska Minerals Borehole Core Details Table
    Inventory summary of oil and gas well materials at the GMC (Source: Alaska Geological Materials Center)

    Box
    Core box number (Source: Alaska Geological Materials Center)

    In the format: 1 of n, where "n" is the total number of boxes for the given borehole

    Top
    Topmost (shallowest) borehole interval in the box (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:10000
    Units:Feet

    Bottom
    Bottommost (deepest) borehole interval in the box (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:10000
    Units:Feet

    Box Memo
    Complex composite field adding box level details (Source: Alaska Geological Materials Center)

    Additional information that may be helpful to the user or curator

    Reality Check
    Link to a web page regarding advice and inventory data limitations (Source: Alaska Geological Materials Center)

    Online HTML version of the GMC Materials Use Advisory <http://dggs.alaska.gov/gmc_inventory/google_earth/html/gmc_advisory.html>

    Complete Minerals Inventory PDF (Materials Inventory Sub-folder 4 of 5)
    Portable Document File containing a printable inventory summary of minerals materials at the GMC. This file can be downloaded only by clicking on the "Complete Minerals Inventory PDF" folder link, shown within the "Materials Inventory" folder of the KML file. Restricting access to the PDF from within the KML file helps ensure the user is always downloading the most recent and up-to-date version of the PDF file. (Source: Alaska Geological Materials Center)

    Prospect Name
    GMC listed prospect name (Source: Alaska Geological Materials Center)

    Unique formal name for each prospect, usually defined in the United States Geological Survey Alaska Resource Data File.

    Hole Name
    Partial/full borehole number (Source: Alaska Geological Materials Center)

    Unique formal name for each borehole, usually a number or a combination of numbers and letters. Multiple boreholes can be associated with a given prospect.

    Top
    Topmost (shallowest) borehole interval in the box (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:10000
    Units:Feet

    Bottom
    Bottommost (deepest) borehole interval in the box (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:0
    Maximum:10000
    Units:Feet

    Boxes
    Number of boxes (Source: Alaska Geological Materials Center)

    Total number of boxes for a given borehole

    Latitude
    The latitude, in decimal degrees (dd.mmmm), of the well. (Source: Alaska Geological Materials Center)

    Range of values
    Minimum:50
    Maximum:72
    Units:Decimal degrees

    Longitude
    The longitude in decimal degrees (dd.mmmm), of the well. (Source: Alaska Oil and Gas Conservation Commission)

    Range of values
    Minimum:-130
    Maximum:179
    Units:Decimal degrees

    Metadata (Materials Inventory Sub-folder 5 of 5)
    Click on the folder link to view general information about and access to this dataset's formal metadata (this file). (Source: Alaska Geological Materials Center)

    GMC Information (Main Folder 2 of 4)
    Click on the yellow placemark pin to view general information about the Alaska GMC. (Source: Alaska Geological Materials Center)

    Alaska Geologic Overlays (Main Folder 3 of 4)
    Contains four network subfolders or additional KML layers related to the Alaska Resource Data File (U.S. Geological Survey, 2008), Historical Mining Regions and Districts of Alaska (Sturmann and Clement, 1993), and Alaska quadrangle names and boundaries and are documented elsewhere (see the "Online_Linkage" entries in the "Lineage" section). Check/uncheck each option box to enable/disable the layer. Note: the USGS ARDF layer is relatively large and may take a while to load over an Internet connection. (Source: Alaska Geological Materials Center)

    Inventory Legend (Main Folder 4 of 4)
    Semitransparent, fixed legend in the top, left corner of the viewport. Check/uncheck the option box to enable/disable the layer. (Source: Alaska Geological Materials Center)


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 publication was supported by the Alaska Division of Geological & Geophysical Surveys General Fund and in part by the Alaska Energy Inventory State Capital Improvement Projects funding. The authors gratefully acknowledge the individuals, companies, and agencies who have contributed to the priceless materials inventory at the Alaska GMC. Special thanks goes to John Reeder, Alaska GMC Curator (1987-2009), for his dedication and building the foundation of one of the most extensive geologic collections in Alaska.

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    GMC Curator
    PO BOX 772805
    Eagle River, AK 99577

    (907) 696-0079 (voice)
    (907) 696-0078 (FAX)
    ken.papp@alaska.gov

    Contact_Instructions:
    You may view the GMC page on the DGGS web site at <http://dggs.alaska.gov/gmc> for the latest information on available inventory data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change.


Why was the data set created?

A geologist's ability to perform modern analyses on these unique samples is paramount for responsible development of the State's vast resources. It is critical that access to and protection of this valuable resource be improved and updated. GMC staff has been acquiring additional inventory details and performing quality control on the information stored in the ever-growing GMC database. Although the main responsibility of the GMC is to preserve and ensure the safety of the physical material stored at the facility, it is equally important to make the material and derived data accessible to the public.


How was the data set created?

  1. From what previous works were the data drawn?

    AOGCC Well Header, 2013 (source 1 of 15)
    AOGCC, 2013, AOGCC Well Header File: NA NA, Alaska Oil and Gas Conservation Commission, Anchorage, AK.

    Online Links:

    Other_Citation_Details: AOGCC_DataExtract.zip, ~19.5Mb
    Type_of_Source_Media: online
    Source_Contribution:
    Provides official state oil and gas well header information for Alaska.

    AOGCC Fm, 2010 (source 2 of 15)
    AOGCC, 2010, AOGCC Formation Top Picks: NA NA, Alaska Oil and Gas Conservation Commission, Anchorage, AK.

    Online Links:

    • None

    Other_Citation_Details:
    100722_LIST_Formation_Tops_and_Markers_NonConfidential.zip, ~650Kb
    Type_of_Source_Media: digital file
    Source_Contribution:
    Provides official state oil and gas well header information for Alaska.

    Bird, 2006 (source 3 of 15)
    Bird, K.J., 2006, Unpublished Data: Alaska Formation-Top Picks: NA NA, United States Geological Survey, Reston, VA.

    Online Links:

    • NA

    Other_Citation_Details: 560 Kb
    Type_of_Source_Media: digital
    Source_Contribution:
    Provides users with measured depths to geologic formations in Alaska. Digital file provided by David Houseknecht (USGS, pers. comm.).

    Bird, pre-2000 (source 4 of 15)
    Bird, K.J., 2000, Undetermined: NA NA, United States Geological Survey, Reston, VA.

    Online Links:

    • NA

    Other_Citation_Details: 560 Kb
    Type_of_Source_Media: digital
    Source_Contribution:
    Provides users with measured depths to geologic formations in Alaska using nomenclature prior to the USGS Professional Paper 1673 <http://pubs.usgs.gov/pp/p1673/>. Digital file provided by David Houseknecht (USGS, pers. comm.).

    Brewer, 1958 (source 5 of 15)
    Brewer, M.C., 1958, Some results of geothermal investigations of permafrost in northern Alaska: Transactions of the American Geophysical Union Vol. 39, No. 1, American Geophysical Union, NA.

    Online Links:

    • NA

    Other_Citation_Details: p. 19-26
    Type_of_Source_Media: paper
    Source_Contribution:
    Provides users with scientific research on permafrost in Northern Alaska.

    Collett and other, 1989 (source 6 of 15)
    Collett, T.S., Bird, K.J., Kvenvolden, K.A., and Magoon, L.B., 1989, Map Showing the Depth to the Base of the Deepest Ice-Bearing Permafrost as Determined from Well Logs, North Slope, Alaska: Oil and Gas Investigations Map OM-222, U.S. Geological Survey, NA.

    Online Links:

    • NA

    Other_Citation_Details: Scale 1:1,000,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 1000000
    Source_Contribution:
    Provides users with scientific research on permafrost in Northern Alaska.

    Collett, 1993 (source 7 of 15)
    Collett, T.S., 1993, Natural gas hydrates of the Prudhoe Bay and Kuparuk River Area, North Slope, Alaska: AAPG Bulletin Vol. 77, No. 5, American Association of Petroleum Geologists, NA.

    Online Links:

    • NA

    Other_Citation_Details: p. 793-812
    Type_of_Source_Media: paper
    Source_Contribution:
    Provides users with scientific research on natural gas hydrates in Northern Alaska.

    Ferrians, 1965 (source 8 of 15)
    Ferrians, O.J., Jr., 1965, Permafrost map of Alaska: Miscellaneous Geologic Investigations Map I-445, U.S. Geological Survey, NA.

    Online Links:

    • NA

    Other_Citation_Details: Scale 1:2,500,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 2500000
    Source_Contribution: Provides users with a state-wide Alaska permafrost map.

    Lachenbruch and others, 1982 (source 9 of 15)
    Lachenbruch, A.H., Sass, J.H., Marshall, B.V., and Moses, T.H., Jr., 1982, Permafrost heat flow, and the geothermal regime at Prudhoe Bay, Alaska: Journal of Geophysical Research Vol. 87, No. B11, American Geophysical Union, NA.

    Online Links:

    • NA

    Other_Citation_Details: p. 9301-9316
    Type_of_Source_Media: paper
    Source_Contribution:
    Provides users with scientific research on permafrost in Northern Alaska.

    Lachenbruch and others, 1987 (source 10 of 15)
    Lachenbruch, A.H., Sass, J.H., Lawver, L.A., Brewer, M.C., Marshall, B.V., Munroe, R.J., Kennelly, J.P., Jr., Galanis, S.P., Jr., and Moses, T.H., Jr., 1987, Temperature and depth of permafrost on the Alaskan Arctic Slope: Society of Economic Paleontologists and Mineralogists, Pacific Section and the Alaska Geological Society, NA.

    Other_Citation_Details: p. 545-558
    This is part of the following larger work.

    Tailleur, I.L. (ed.), and Weimer, P. (ed.), 1987, Alaskan North Slope Geology: NA Book 50, v. 2, Society of Economic Paleontologists and Mineralogists, Pacific Section and the Alaska Geological Society, NA.

    Type_of_Source_Media: paper
    Source_Contribution:
    Provides users with scientific research on permafrost in Northern Alaska.

    MacCarthy, 1952 (source 11 of 15)
    MacCarthy, G.R., 1952, Geothermal investigations on the Arctic Slope of Alaska: Transactions of the American Geophysical Union Vol. 33, No. 4, American Geophysical Union, NA.

    Online Links:

    • NA

    Other_Citation_Details: p. 589-593
    Type_of_Source_Media: paper
    Source_Contribution:
    Provides users with scientific research on geothermal observations in Northern Alaska.

    Osterkamp and Payne, 1981 (source 12 of 15)
    Osterkamp, T.E., and Payne, M.W., 1981, Estimates of permafrost thickness from well logs in northern Alaska: Cold Regions Science and Technology Vol. 5, NA, NA.

    Online Links:

    • NA

    Other_Citation_Details: p. 13-27
    Type_of_Source_Media: paper
    Source_Contribution:
    Provides users with scientific research on permafrost thickness in Northern Alaska.

    Sturmann and Clement, 1993 (source 13 of 15)
    Sturmann, A.G., and Clement, R.F., 1993, Historical mining regions and districts of Alaska: Public Data File PDF 93-49, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:2,500,000
    Type_of_Source_Media: paper, online
    Source_Scale_Denominator: 2500000
    Source_Contribution: Provides users Alaska mining district boundaries.

    U.S. Geological Survey, 2008 (source 14 of 15)
    U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report ODF 2008-1225, U.S. Geological Survey, Anchorage, AK.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:2,500,000
    Type_of_Source_Media: online
    Source_Scale_Denominator: 2500000
    Source_Contribution:
    Provides users with descriptions of mines, prospects, and mineral occurrences in Alaska.

    USGS, 1981 (source 15 of 15)
    U.S. Geological Survey, 1981, U.S. Geographic Names Information System (GNIS) Public Query Site: None None, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: None
    Type_of_Source_Media: online
    Source_Contribution:
    Used to determine some mineral prospect locations that were not listed in the U.S.G.S. ARDF.

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

    Date: 09-Apr-2010 (process 1 of 9)
    Version 1.0 - Process Summary: Well and prospect locations related to the GMC inventory were converted to KML via a custom-built Microsoft Access script. All attribute information originates from GMC in-house inventory data, with the exception of the optional layers which can be enabled in the KML file. The GMC inventory is updated continuously and, as a result, the main GMC inventory KML file utilizes network links to call and load the individual well and prospect layers over the Internet. This methodology allows the user to always have the most current GMC inventory information. New well header information from the AOGCC is added into the GMC database on a regular basis, although the GMC does not necessarily have material inventory for all of the wells listed by the AOGCC. Prospect locations have been matched up with information provided in the ARDF for known prospects and boreholes. The GMC has several prospects and boreholes of unknown origin and additional research and user input is required to ascertain their location and drilling history. The location of some prospects were assigned by information available in Orth, 1971 and may have a coordinate that represents the center of many related boreholes (i.e. Amchitka Island). Mineral prospects of unknown location have been assigned a surface coordinate east of the Alaska GMC on the Earth (61.3493 N, -149.5398 W). Final changes to any HTML markup within the KML file was done in a text editor.

    Data sources used in this process:

    • AOGCC Well Header, 2013
    • USGS, 1981
    • Sturmann and Clement, 1993
    • U.S. Geological Survey, 2008

    Date: 09-Apr-2010 (process 2 of 9)
    Version 1.0 - Programming Guide: This online explanation briefly outlines and shows examples of how the Alaska Geologic Materials Center (GMC) uses Keyhole Markup Language (KML) programming to publish parts of our geologic materials inventory. <http://dggs.alaska.gov/gmc_inventory/google_earth/metadata/gmc-inventory-code-summary.html>

    Date: 09-Apr-2010 (process 3 of 9)
    Version 1.0 - Metadata were written by Kenneth R. Papp to FGDC Standards using a text editor.

    Date: 26-Apr-2010 (process 4 of 9)
    Version 1.1 - Added Alaska quadrangle names and boundaries layer to the Alaska Geologic Overlays folder in the KML file.

    Date: 08-Oct-2010 (process 5 of 9)
    Version 1.2 - We have experienced a potential Google Earth bug that crashes the program during the initial zooming sequence over Alaska <http://earth.google.com/support/bin/search.py?ctx=en:searchbox&forum=1&query=crash+zoom>. As a result, we have changed the initial zoom altitude to a higher value as a work-around for this bug. You may also try visiting the "Resolving crashing and graphics issues" Google Earth help page <http://earth.google.com/support/bin/answer.py?hl=en&answer=20713> for additional solutions.

    Date: 29-Oct-2010 (process 6 of 9)
    Version 1.3 - Formation Top Picks: The GMC incorporated geologic formation-top picks into its online inventory. In-kind data contributions by the AOGCC (Steve Davies, pers. comm.) and USGS (David Houseknecht, pers. comm.) were compiled by GMC staff and entered into the database. Users can now view all of the oil and gas well material that is associated with a particular geologic formation and therefor more easily identify the available materials that contain potential oil and gas-bearing rock layers. Formation top picks related to the GMC's material inventory are also available in PDF and Microsoft Excel spreadsheet formats on the GMC Inventory web page <http://dggs.alaska.gov/gmcinventory>.

    Data sources used in this process:

    • AOGCC Fm, 2010
    • Bird, 2006
    • Bird, pre-2000
    • Brewer, 1958
    • Collett and others, 1989
    • Collett, 1993
    • Ferrians, 1965
    • Lachenbruch and others, 1982
    • Lachenbruch and others, 1987
    • MacCarthy, 1952
    • Osterkamp and Payne, 1981

    Date: 17-Feb-2011 (process 7 of 9)
    Version 1.4 - The Google Earth bug that crashes the program during the initial zooming sequence over Alaska <http://earth.google.com/support/bin/search.py?ctx=en:searchbox&forum=1&query=crash+zoom> has been fixed in Google Earth version 6. This latest 1.4 release (1) redefined initial zoom parameters to show oil and gas well locations at first launch, (2) clarified instructions and recommendations shown in the initial help pop-up window, and (3) improved and clarified file/folder structure in the Google Earth "Places" sidebar.

    Date: 31-Oct-2011 (process 8 of 9)
    Version 1.45 - This latest release (1) adds links to Alaska GMC news and facility updates to the initial pop-up balloon, (2) updates file links to comply with the new DGGS website rollout, and (3) includes new inventory added to the collection since February 2011.

    Date: 01-Oct-2013 (process 9 of 9)
    Version 1.5 - This latest release removes the Merritt and Hawley, 1986 SR37 coal resources map layer (<http://www.dggs.alaska.gov/pubs/id/2636>). It is superseded by SR66 (<http://www.dggs.alaska.gov/pubs/id/24264>).

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

    Alaska Division of Geological & Geophysical Surveys, 1985, Alaska Geologic Materials Center: Information Circular IC 27, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.

    Online Links:

    Other_Citation_Details: 6 p.
    Reeder, J.W., 2009, The Alaska Geologic Materials Center: Newsletter NL 2009-1, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, Alaska - USA.

    Online Links:

    Other_Citation_Details: 12 p.
    Staff, DGGS, 2013, Alaska Division of Geological & Geophysical Surveys Annual Report: Annual Report AR 2012, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.

    Online Links:

    Other_Citation_Details: 82 p.
    Szumigala, D.J., 2012, Alaska's mineral industry 2011 - exploration activity: Special Report SR 63, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.

    Online Links:

    Other_Citation_Details: 10 p.


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

  1. How well have the observations been checked?

    This dataset includes oil and gas well locations and mineral prospect locations related to the materials inventory at the GMC. The oil and gas well locations are provided by the Alaska Oil and Gas Conservation Commission well header <http://doa.alaska.gov/ogc/publicdb.html>. Mineral prospect locations are derived from the Alaska Resource Data File (ARDF), published for individual U.S. Geological Survey 1:250,000 scale quadrangles in Alaska, drilling logs, and the U.S. Geographic Names Information System (GNIS) (USGS, 1981). The dataset also contains previously published data layers from the Alaska Resource Data File (U.S. Geological Survey, 2008) and Historical Mining Regions and Districts of Alaska (Sturmann and Clement, 1993).

  2. How accurate are the geographic locations?

    The estimated horizontal error of this dataset is +/- 250 meters. The location of some prospects were assigned by information available in Orth, 1971 and may have a coordinate that represents the center of many related boreholes (i.e. Amchitka Island). Mineral prospects of unknown location have been assigned a surface coordinate east of the Alaska GMC on the Earth (61.3493 N, -149.5398 W). Additional research is required to correctly identify these prospects and their true locations. Location accuracy information for Google Earth can be found at <http://earth.google.com/support/bin/static.py?page=guide.cs&guide=22373&topic=23750>.

  3. How accurate are the heights or depths?

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

    The Alaska Geologic Materials Center is constantly acquiring additional inventory details and performing quality control on the information for hundreds of thousands of samples -- a process that will take many years to complete. As a result, the GMC strives to find a balance between the public release of samples with more accurate data versus suppressing sample information with partial and/or inaccurate data. The GMC is biased towards greater public access to our store of geologic wealth. Consequently, users of the facility must understand that inventory data may be inadequate or inappropriate for making certain decisions. Always contact the GMC staff to confirm that our released sample inventory will meet your research requirements. GMC staff is also willing, at this contact, to determine if other inventory options might also meet your current needs. Please contact us if you would like to contribute any documented corrections or additions to the GMC inventory data. Contributing maps, drill records, or any other documentation is especially welcome.

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

    Polygon topology is present and clean on the previously published geospatial data layers. Other data are line, point, or annotation data and do not require topologic relationships.


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. 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.

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    Attn: Kenneth R. Papp
    Curator, Geologist V
    PO BOX 772805
    Eagle River, AK 99577
    USA

    907-696-0079 (voice)
    907-696-0078 (FAX)
    ken.papp@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm Monday through Friday, except State holidays
    Contact_Instructions:
    Please view the GMC page <http://dggs.alaska.gov/gmc> on the DGGS web site for the latest 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?

    The Alaska Geological Materials Center online inventory

  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. What hardware or software do I need in order to use the data set?

    Internet connection required. Please check the Google Earth <http://earth.google.com>, NASA World Wind <http://worldwind.arc.nasa.gov/>, and Microsoft Bing Maps 3D <http://www.bing.com/maps/> web sites for the latest documentation on loading and using KML files.


Who wrote the metadata?

Dates:
Last modified: 01-Oct-2013
Last Reviewed: 01-Oct-2013
To be reviewed: 01-Oct-2014
Metadata author:
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
Attn: Kenneth R. Papp
GMC Curator, Geologist V
PO BOX 772805
Eagle River, AK 99577
USA

907-696-0079 (voice)
907-696-0078 (FAX)
ken.papp@alaska.gov

Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays.
Contact_Instructions:
Please contact us through the e-mail address above whenever possible.
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.21 on Tue Oct 1 15:11:11 2013