Fossil locality map of the Healy A-6 Quadrangle, south-central Alaska

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Frequently-anticipated questions:


What does this data set describe?

Title:
Fossil locality map of the Healy A-6 Quadrangle, south-central Alaska
Abstract:
This report presents in tabular form a complete listing of faunal and minor floral elements, along with their identification as known to date, for all fossils collected by field party members of the Alaska Division of Geological & Geophysical Surveys (DGGS) during their 1997 and 1998 geological mapping effort in the Healy A-6 Quadrangle. In addition, all known U.S. Geological Survey fossil localities that could be located from previously published maps are also shown on the fossil locality map and listed in the fossil register.
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_Attribute_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Layers include:
fossil_loc    compiled fossil locations
  1. How should this data set be cited?

    Blodgett, R.B., and Clautice, K.H., 2000, Fossil locality map of the Healy A-6 Quadrangle, south-central Alaska: Report of Investigation RI 2000-5, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, Alaska - USA.

    Online Links:

    Other_Citation_Details: 42 p., 1 sheet, scale 1:63,360

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -150.00
    East_Bounding_Coordinate: -149.50
    North_Bounding_Coordinate: 63.25
    South_Bounding_Coordinate: 63.00

  3. What does it look like?

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

    Calendar_Date: 2000
    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?

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -147.000
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000
      False_Northing: 0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000064
      Ordinates (y-coordinates) are specified to the nearest 0.000064
      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 6378206.4.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    fossil_loc.shp
    Object type is point, there are 154 records associated with this entity, and the entity values refer to fossil locations. (Source: Alaska Division of Geological & Geophysical Surveys)

    POINT_X
    Easting coordinate in UTM (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:348913.284818
    Maximum:373463.962979
    Units:meters

    POINT_Y
    Northing coordinate in UTM (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:6989289.53673
    Maximum:7014932.74724
    Units:meters

    sample_num
    Sample number assigned to each fossil location (Source: Alaska Division of Geological & Geophysical Surveys)

    Arbitrary sample number assigned to each fossil location (1-154).


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?

    Members of the DGGS mapping crew that contributed fossils for this study included: Rainer Newberry, Ellen Hams, Rocky Reifenstuhl, Shirley Liss, Tom Bundtzen, and Jim Clough. We are greatly indebted to C.C. Hawley for the hospitality extended to DGGS during their stay at the Golden Zone Mine during the summers of 1997 and 1998. We also greatly benefited from his vast knowledge of the areal geology of the Upper Chulitna district. Norm Silberling was extremely helpful during discussions on the Triassic stratigraphy of the region. We also gratefully appreciate the efforts of the following paleontologists in their efforts to identify various elements of the collected fauna: George Stanley, Triassic corals and spongiomorphs; Michael Sandy and Monica Stefanoff, Triassic bivalves; Norman Savage, Paleozoic and Triassic conodonts; and Chris McRoberts, Triassic bivalves. We extend our thanks to Arthur J. Boucot, Oregon State University, Corvallis, Oregon, and David LePain, DGGS, for reviewing this manuscript.

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    GIS Data Manager/Cartographer
    3354 College Road
    Fairbanks, AK 99709-3707

    (907) 451-5029 (voice)
    (907) 451-5050 (FAX)
    dggspubs@alaska.gov

    Contact_Instructions:
    You may view our web site at <http://www.dggs.dnr.state.ak.us> for the latest information on available 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?

The purpose of this listing of fossil localities and their contained faunas is to provide biostratigraphic age control for the recent DGGS mapping efforts in the Healy A-6 Quadrangle and surrounding areas.


How was the data set created?

  1. From what previous works were the data drawn?

    Hawley and Clarke, 1974 (source 1 of 7)
    Hawley, C.C., and Clark, A.L., 1974, Geology and mineral deposits of the Upper Chulitna District, Alaska: U.S. Geological Survey Professional Paper 758-B, U.S. Geological Survey, Reston, VA - USA.

    Online Links:

    Other_Citation_Details: p. B1-B47, 2 sheets, scale 1:12,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 12000
    Source_Contribution:
    This publication provides a geologic background and other fossil localities related to the field area.

    Silberling and others, 1978 (source 2 of 7)
    Silberling, N.J., Jones, D.L., Csejtey, Bela, Jr., and Nelson, W.H., 1978, Interpretive bedrock geologic map of part of the upper Chulitna district, Healy A-6 quadrangle, Alaska Range, Alaska: U.S. Geological Survey Open-File Report 1961, U.S. Geological Survey, Reston, VA - USA.

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution:
    This publication provides a geologic background and other fossil localities related to the field area.

    Jones and others, 1980 (source 3 of 7)
    Jones, D.L., Silberling, N.J., Csejtey, Bela, Jr., Nelson, W.H., and Blome, C.D., 1980, Age and structural significance of ophiolite and adjoining rocks in the upper Chulitna District, South-central Alaska: U.S. Geological Survey Professional Paper 1121-A, U.S. Geological Survey, Reston, VA - USA.

    Online Links:

    Other_Citation_Details: p. A1-A21, 1 sheet, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution:
    This publication provides geologic age constraints and other fossil localities related to the field area.

    Csejtey and others, 1992 (source 4 of 7)
    Csejtey, Bela, Jr., Mullen, M.W., Cox, D.P., and Stricker, G.D., 1992, Geology and geochronology of the Healy Quadrangle, south-central Alaska: U.S. Geological Survey Miscellaneous Investigations 1961, U.S. Geological Survey, Reston, VA - USA.

    Online Links:

    Other_Citation_Details: 63 p., 2 sheets, scale 1:360,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 360000
    Source_Contribution:
    This publication provides a geologic background and other fossil localities related to the field area.

    Stanley, 1999 (source 5 of 7)
    Stanley, G.D., Jr., 1999, Upper Triassic reef faunas from the Chulitna terrane, Alaska: Geological Society of America Abstracts with Programs v. 31, no. 7, Geological Society of America, Boulder, CO - USA.

    Other_Citation_Details: p. A-104
    Type_of_Source_Media: paper
    Source_Contribution:
    This publication provides other fossil localities related to the field area.

    Stefanoff and others, 1999 (source 6 of 7)
    Stefanoff, Monica, Sandy, M.R., and Blodgett, R.B., 1999, Late Triassic brachiopods from the Chulitna terrane, south-central Alaska and the paleogeographic significance: Geological Society of America Abstracts with Programs v. 31, no. 7, Geological Society of America, Boulder, CO - USA.

    Other_Citation_Details: p. A-472
    Type_of_Source_Media: paper
    Source_Contribution:
    This publication provides other fossil localities related to the field area.

    Yarnell and others, 1999 (source 7 of 7)
    Yarnell, J.M., Stanley, George, and Hart, C.J.R., 1999, New paleontological investigations of Upper Triassic shallow-water reef carbonates (Lewes River Group) in the Whitehorse area, Yukon Larger_Work_Citation::.

    Online Links:

    Other_Citation_Details: p. 179-184
    This is part of the following larger work.

    Roots, C.F. (ed.), and Emond, D.S. (ed.), 1999, Yukon Exploration and Geology 1998: none none, Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, Whitehorse, Yukon, Canada.

    Type_of_Source_Media: paper
    Source_Contribution:
    This publication provides other fossil localities related to the field area.

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

    Date: 1998 (process 1 of 2)
    Fieldwork and map compilation - The fossils were collected by field party members of the Alaska Division of Geological & Geophysical Surveys (DGGS) during their 1997 and 1998 geological mapping effort in the Healy A-6 Quadrangle. In addition, all known U.S. Geological Survey fossil localities that could be located from previously published maps are also shown on the fossil locality map and listed in the fossil register. Lengthy faunal lists for rocks of the upper Chulitna district are found in Hawley and Clark (1974), Silberling and others (1978), Jones and others (1980), and Csejtey and others (1992). Two abstracts and one paper (Stanley, 1999; Stefanoff and others, 1999; and Yarnell and others, 1999) were published in 1999, which delve respectively with aspects of the coral, brachiopod, and bivalve fauna from the Upper Triassic of the Chulitna terrane. Point data was manually compiled and digitized on-screen in MapInfo to create the original published map, using the field sheet for reference.

    Data sources used in this process:

    • Hawley and Clarke, 1974
    • Silberling and others, 1978
    • Jones and others, 1980
    • Csejtey and others, 1992
    • Stanley, 1999
    • Stefanoff and others, 1999
    • Yarnell and others, 1999

    Date: 2007 (process 2 of 2)
    Digitizing sample locations - An ArcGIS shape file was created by georectifying the original map image using the four corner points and three points within the map located in the northeast, central, and southwest portions of the image. The image was then assigned a NAD 27 UTM Zone 6N projection and points were digitized using a pen tablet in the ArcGIS environment.

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

    Clautice, K.H., Newberry, R.J., Blodgett, R.B., Bundtzen, T.K., Gage, B.G., Harris, E.E., Liss, S.A., Miller, M.L., Reifenstuhl, R.R., Clough, J.G., and Pinney, D.S., 2001, Bedrock geologic map of the Chulitna region, southcentral Alaska: Report of Investigation RI 2001-1A, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, Alaska - USA.

    Online Links:

    Other_Citation_Details: 31 p., 1 sheet, scale 1:63,360
    Clautice, K.H., Newberry, R.J., Pinney, D.S., Blodgett, R.B., Bundtzen, T.K., Gage, B.G., Harris, E.E., Liss, S.A., Miller, M.L., Reifenstuhl, R.R., and Clough, J.G., 2001, Geologic map of the Chulitna region, southcentral Alaska: Report of Investigation RI 2001-1B, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK.

    Online Links:

    Other_Citation_Details: 32 p., 1 sheet, scale 1:63,360
    Pinney, D.S., 200105, Surficial-geologic map of the Chulitna region, southcentral Alaska: Report of Investigation RI 2001-1C, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK.

    Online Links:

    Other_Citation_Details: 3 p., 1 sheet, scale 1:63,360
    Pinney, D.S., 2001, Engineering-geologic map of the Chulitna region, southcentral Alaska: Report of Investigation RI 2001-1D, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK.

    Online Links:

    Other_Citation_Details: 5 p., 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?

    Locations were determined visually from topographic maps in the field. Attributes were verified for consistency and completeness during the creation of the metadata.

  2. How accurate are the geographic locations?

    Locations were determined visually from topographic maps in the field using 1:63,360 maps that had been enlarged to about 1:40,000 (GPS was not used). The coordinates of sample and station locations were entered into an Excel spreadsheet with a digitizing tablet. Point data was manually compiled/digitized on-screen in MapInfo to create the original published map, using the field sheet for reference. The original published map was then georectified and sample locations were digitized in ArcGIS software in 2007 (see Process_Step below).

  3. How accurate are the heights or depths?

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

    This dataset includes geospatial information regarding fossil sample locations in the Healy A-6 Quadrangle.

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

    This dataset consists only point data and does not require topology.


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
    Natural Resource Technician
    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.dnr.state.ak.us>) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
  2. What's the catalog number I need to order this data set?

    Report of Investigation 2000-5

  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?

    Please check the MapInfo web site (<http://www.mapinfo.com/>) for the latest documentation on importing ESRI shape files.


Who wrote the metadata?

Dates:
Last modified: 06-May-2008
Last Reviewed: 06-May-2008
To be reviewed: 12-Apr-2009
Metadata author:
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

907-451-5039 (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 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 2.9.6 on Tue May 06 14:29:39 2008