Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for the Kuskokwim Bay region of southwest Alaska

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

Frequently-anticipated questions:

What does this data set describe?
    Title:
    Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for the Kuskokwim Bay region of southwest Alaska
    Abstract:
    The area of this data set is a collage of loosely defined tectonostratigraphic terranes of widely varying age. The rocks of the area range from Proterozoic age metamorphic rocks of the Kanektok metamorphic complex (Kilbuck terrane) to Quaternary age mafic volcanic rocks of Nunivak Island. The map area encompasses much of the type area of the Togiak-Tikchik Complex. The geologic maps used to construct this compilation are for the most part, reconnaissance studies done in the time period from the 1950's to the 1990's. Pioneering work in the map area by J.M. Hoare and W.L. Coonrad forms the basis for much of this map, either directly or as the stepping off point for later studies compiled here.

    This data set is a portion of a statewide geology database, which is being compiled by the U.S. Geological Survey's National Surveys and Analysis (NSA) project, whose goal is to compile geologic, geochemical, geophysical, and other data.

  1. How should this data set be cited?

    Wilson, Frederic H., Hults, Chad P., Mohadjer, Solmaz, Coonrad, Warren L., Labay, Keith A., and Shew, Nora, 2008, Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for the Kuskokwim Bay region of southwest Alaska: U.S. Geological Survey Open-File Report OFR 2008-1001.

    Online Links:

    This is part of the following larger work.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -174.0
    East_Bounding_Coordinate: -158.0
    North_Bounding_Coordinate: 61.0
    South_Bounding_Coordinate: 56.4

  3. What does it look like?

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

    Calendar_Date: 2008
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set.

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 2
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -171.0
      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 0.000256
      Ordinates (y-coordinates) are specified to the nearest 0.000256
      Planar coordinates are specified in meters

  7. How does the data set describe geographic features?

    polygons
    Characteristics of the polygon features in the geology coverages are coded in the polygon attribute table. The table <cov>.pat includes the following items: CLASS, NSACLASS, NSAMOD, QCLASS (not used), SOURCE, LABEL, MIN_AGE, and MAX_AGE. (Source: this data set)

    NSACLASS
    NSACLASS is a positive integer value (4 5 B) item in the polygon attribute table. Values range discontinuously from 98 to 9420. NSACLASS is a numeric code for the geologic unit. This data set represents a generalized geologic map, thus it is possible that a geologic unit is made of multiple NSACLASS values. NSACLASS to LABEL is a many-to-one relationship. Each LABEL has a mininum (MIN_AGE) and maximum (MAX_AGE) age range, given in million of years (my). Supplemental attribute tables included with this data set, contain additional descriptive information of each geologic unit. A user may use items SOURCE and CLASS to retrieve information about the original units from which these generalized units were formed. NOTE: Because of the limitations of common GIS fonts, the letter combinations "Tr", "Mz", and "Pz" are substituted for the standard age symbols for "Triassic", "Mesozoic", and "Paleozoic." (Source: This data set)

    ValueDefinition
    98un - unmapped area
    100Qs - Surficial deposits, undivided (Quaternary)
    101ice
    102water
    103Qtf - Tidal flat and active estuarine deposits (Holocene)
    105Qa - Alluvial deposits (Quaternary)
    113Qrs - Reworked silt (Quaternary)
    115Qb - Beach deposits (Quaternary)
    116Qes - Estuarine deposits (Quaternary)
    117Qmt - Marine terraces (Quaternary)
    119Qed - Eolian deposits (Quaternary)

    120Qed - Eolian deposits (Quaternary)
    121Qsd - Silt deposits (Quaterary)
    125Qg - Glacial deposits, undivided (Quaternary)
    135Qgm - Glacial moraine (Quaternary)
    140Qgo - Outwash deposits (Quaternary)
    282QTs - Semiconsolidated marine beach deposits (Quaternary, Pleistocene or Tertiary)
    310Qpd - Pyroclastic rocks (Quaternary)
    317Qvs - Volcaniclastic sediment (Quaternary)
    320Qcs - Alkalic basalt of Karon Lake (Quaternary)
    330Qvb - Basalt flows, undivided (Quaternary, Pleistocene)
    350Qvbm - Basalt flows (Quaternary, Matuyama polarity epoch)
    450QTv - Volcanic rocks, undivided (Quaternary, Pleistocene or Tertiary, Pliocene)
    466QTab - Older alkalic basalt of Karon Lake (Quaternary, Pleistocene and Tertiary, Pliocene)
    1023Talb - Alkalic basalt of Ahzwiryuk Bluff (Tertiary, Pliocene)
    1024Ttb - Tholeiitic basalt of Binakslit Bluff (Tertiary, Pliocene)
    1053Tfi - Felsic intrusive rocks (Tertiary, Miocene?)
    1110Tnr - Nukluk Volcanic Field, rhyolite (Tertiary, Eocene)
    1111Tnba - Nukluk Volcanic Field, basalt and andesite (Tertiary, Eocene)
    1120Tvep - Rhyolite and dacite tuff (Tertiary)
    1301Tad - Aplite on Saint George Island (Tertiary, Eocene)
    1603TKr - Rhyolite and dacite flows, tuff, dikes, and sills (Early Tertiary and (or) Late Cretaceous)
    1604TKr - Rhyolite and dacite flows, tuff, dikes, and sills (Early Tertiary and (or) Late Cretaceous)
    1605TKa - Eek and Swift Creek volcanic fields of Box and others (1993); andesite flows (Early Tertiary and (or) Late Cretaceous)
    1640TMzp - Peridotite on Saint George Island (Tertiary or older)
    1655TKg - Granitic rocks, undivided (Tertiary and (or) Cretaceous)
    1656TKgr - Granite (Tertiary and (or) Cretaceous)
    1657TKgs - Monzonite (Tertiary and (or) Cretaceous)
    1658TKqm - Quartz monzonite and quartz monzodiorite (Tertiary and (or) Cretaceous)
    1660TKgd - Granodiorite (Tertiary and (or) Cretaceous)
    1665TKqd - Monzodiorite and quartz diorite (Tertiary and (or) Cretaceous)
    1670TKm - Mafic intrusive rocks (Tertiary, Paleocene, and Cretaceous?)
    1960Ks - Summit Island Formation (Upper Cretaceous, Maastrichtian?)
    1970Kk - Kuskokwim Group, undivided (Cretaceous, Campanian? to Albian)
    1985Kkn - Kuskokwim Group, nearshore facies (Cretaceous, Turonian to Albian)
    2021Kys - Sandstone, shale, and conglomerate deltaic deposits (Upper Cretaceous?)
    2102Kcgs - Calcareous graywacke and siltstone of the Eek Mountains belt of Hoare and Coonrad (1983) (Lower Cretaceous, Valanginian)
    2105Kygv - Volcanic graywacke and argillite (Cretaceous?)
    2125Kgbr - Graywacke of Buchia Ridge (Lower Cretaceous, Valanginian and Hauterivian)
    2150Klg - Limy grit and limestone of the Ungalikthluk belt of Hoare and Coonrad (1983) (Lower Cretaceous, Valanginian)
    2180Kvm - Volcanic and sedimentary rocks of the Mount Oratia belt of Hoare and Coonrad (1983) (Lower Cretaceous, Valanginian)
    2210Kv - Volcanic rocks (Late Cretaceous, Maastrichtian and Campanian)
    2260Kv - Volcanic rocks (Late Cretaceous, Maastrichtian and Campanian)
    2261Kv - Volcanic rocks (Late Cretaceous, Maastrichtian and Campanian)
    2265Kpd - Intermediate and silicic pyroclastic rocks (Late Cretaceous)
    2510Ksp - Serpentinite (Late Cretaceous?)
    2530Kg - Granodiorite and granite (Early Cretaceous)
    2832KJc - Argillite and tuffaceous chert (Lower Cretaceous and (or) Upper Jurassic)
    2870KJba - Basaltic and andesitic lava flows (Early Cretaceous and (or) Late Jurassic)
    2872KTrvs - Volcanic and sedimentary rocks (Lower Cretaceous to Upper Triassic?)
    2885TJih - Hypabyssal felsic intrusive rocks (earliest Tertiary? to Late Jurassic?)
    2890KJb - Pillow basalt (Lower Cretaceous and (or) Upper Jurassic)
    2900TJis - Slate Creek pluton of Box and others (1993) (earliest Tertiary? to Late Jurassic?)
    3005Jvs - Marine volcaniclastic sandstone, conglomerate, and argillite (Jurassic)
    3120Jvc - Volcaniclastic conglomerate, sandstone, and shale (Upper and Middle Jurassic)
    3130Ja - Marine arkosic sandstone and argillite (Jurassic)
    3150Jkw - Graywacke of Kulukak Bay (lower Upper to Middle Jurassic)
    3151Jmm - Turbidites of Metervik Bay of Box (1985a) (Upper and Middle Jurassic)
    3152Jvt - Volcaniclastic turbidites of Togiak Bay of Box (1985a) (Middle Jurassic)
    3230Jln - Dismembered volcaniclastic turbidites (Lower Jurassic?)
    3254Jlvs - Volcanic and sedimentary rocks (Lower Jurassic)
    3255JTrcv - Coarse volcaniclastic rocks (Lower Jurassic to Upper Triassic)
    3260JTrp - Phyllite and chert (Lower Jurassic and Upper Triassic?)
    3310Jlt - Laminated tuff and associated rocks of Box (1985a) (Jurassic)
    3380JTrot - Trondhjemite (Lower Jurassic to Middle Triassic)
    3406Jgb - Gabbroic rocks (Middle and Early Jurassic)
    3450Jab - Andesite and basalt (Middle Jurassic)
    3451Jmv - Interbedded volcanic and sedimentary rocks (Middle Jurassic)
    3495Jum - Ultramafic rocks (Jurassic?)
    3510Jlgd - Hagemeister pluton of Box (1985a) (Early Jurassic?)
    3891Trob - Pillow basalt (Triassic)
    3892JTrot - Trondhjemite (Lower Jurassic to Middle Triassic)
    3893Trod - Diabasic intrusive rocks (Triassic)
    3894Trog - Pyroxene gabbro (Triassic)
    3895Jum - Ultramafic rocks (Jurassic?)
    3950TrPcs - Calcareous schist (Triassic? to Permian?)
    3990TrPmb - Metabasaltic schist (Triassic? to Permian?)
    3991TrPvs - Volcaniclastic glaucophane-hornblende-epidote schist (Triassic? to Permian?)
    4035Trvs - Volcanic and sedimentary rocks (Upper Triassic)
    4215Trv - Basalt and chert (Upper Triassic)
    4710MzPzt - Togiak-Tikchik Complex, undivided (Lower Cretaceous to Lower Paleozoic)
    4880TJik - Little Kasigluk River pluton of Box and others (1993) (earliest Tertiary? to late Jurassic?)
    4950Mzm - Melange (Mesozoic)
    5026MzPzc - Chert and argillite (Mesozoic and (or) Paleozoic)
    5045MzPzv - Volcaniclastic sandstone and argillite (Mesozoic and (or) Paleozoic)
    5050MzPzs - Arkosic sandstone and slate (Mesozoic and (or) Paleozoic)
    5060Pcs - Clastic rocks (Permian?)
    5090MzPza - Argillaceous melange (Mesozoic to Paleozoic)
    5217MzPzp - Chloritic phyllite (Mesozoic and (or) Paleozoic)
    5225MzPzm - Metachert and phyllitic metachert (Mesozoic and (or) Paleozoic)
    5239Jgs - Green amphibole-bearing schist (Late Jurassic)
    5730Pls - Limestone (Permian)
    5746Pvs - Volcaniclastic sedimentary rocks (Permian)
    5810Pv - Volcanic rocks (Permian)
    6412MDv - Greenstone and schist (Lower Mississippian or Upper Devonian)
    6580MDm - Marble and metabasaltic dikes (Lower Mississippian and (or) Upper Devonian)
    6995DOl - Thin-bedded limestone (Devonian to Ordovician)
    8610Zkm - Marble (Paleoproterozoic)
    9420Zk - Kanektok metamorphic complex, undivided (Paleoproterozoic)

    NSAMOD
    NSAMOD is a character (8 10 C) item in the polygon attribute table. It contains modifiers of the geologic unit. (Source: this data set)

    ALT - hydrothermal alteration HFS - contact metamorphism, hornfels Q - queried unit

    SOURCE
    SOURCE is a character (6 8 C) item found in both the polygon and arc attribute tables. The values are abbreviated codes representing the original source reference for the polygon or arc feature. The format for SOURCE is XX###, where XX is a two letter code for the 1:250,000 scale quadrangle and ### is a three digit number (with leading zeros). All source codes with '001' are unspecified sources for water and ice features, often paper topographic maps, and DRG or DLG files. (Source: this data set)

    ValueDefinition
    BH002Box, S.E., Moll-Stalcup, E.J., Frost, T.P., and Murphy, J.M., 1993, Preliminary geologic map of the Bethel and southern Russian Mission quadrangles, southwestern Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-2226-A, scale 1:250,000.
    BH003Hoare, J.M., and Coonrad, W.L., 1978, Geologic map of the Goodnews and Hagemeister Island quadrangles region, southwestern Alaska: U.S. Geological Survey Open-File Report 78-9-B, scale 1:250,000, 2 sheets.
    BH004Hoare, J.M., and Coonrad, W.L., 1959, Geology of the Bethel quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-285, scale 1:250,000.
    BH007Wilson, F.H., and Hults, Chad, 2006, Edits to match Box and others (1993) Bethel map and Hoare and Coonrad (1978) Goodnews Bay map.
    BI002Coonrad, W.L., 1957, Geologic reconnaissance in the Yukon-Kuskokwim Delta region, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Series Map I-233, scale 1:500,000.
    BI003Wilson, F.H., 2007, Reconnaissance mapping of surficial geology, Baird Inlet quadrangle.
    CM003Hoare, J.M., Condon, W.H., Cox, Allan, and Dalrymple, G.B., 1968, Geology, paleomagnetism, and potassium-argon ages of basalts from Nunivak Island, Alaska in Coats, R.R., Hay, R.L., and Anderson, C.A., eds., Studies in Volcanology-- A memoir in honor of Howell Williams: Geological Society of America Memoir 116, p. 377-413, 1 plate, scale 1:250,000.
    GO002Hoare, J.M., and Coonrad, W.L., 1978, Geologic map of the Goodnews and Hagemeister Island quadrangles region, southwestern Alaska: U.S. Geological Survey Open-File Report 78-9-B, scale 1:250,000, 2 sheets.
    GO005Box, S.E., 1985, Mesozoic tectonic evolution of the northern Bristol Bay region, southwestern Alaska: Santa Cruz, University of California, Ph.D. dissertation, 163p., 7 tables, 21 figures, 2 plates.
    GO006Wilson, F.H., and Hults, Chad, 2006, Edits to integrate maps.
    GO007Hoare and Coonrad field maps, circa 1975.
    GO008Hoare, J.M., and Coonrad, W.L., 1961, Geologic map of the Goodnews quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-339, scale 1:250,000.
    HG002Hoare, J.M., and Coonrad, W.L., 1978, Geologic map of the Goodnews and Hagemeister Island quadrangles region, southwestern Alaska: U.S. Geological Survey Open-File Report 78-9-B, scale 1:250,000, 2 sheets.
    HG003Box, S.E., 1985, Mesozoic tectonic evolution of the northern Bristol Bay region, southwestern Alaska: Santa Cruz, University of California, Ph.D. dissertation, 163 p., 7 tables, 21 figures, 2 plates.
    HG005Hoare, J.M., and Coonrad, W.L., 1961, Geologic map of the Hagemeister Island quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-321, scale 1:250,000.
    KB002Coonrad, W.L., 1957, Geologic reconnaissance in the Yukon-Kuskokwim Delta region, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Series Map I-223, scale 1:500,000.
    KB003Wilson, F.H., 2007, Reconnaissance mapping of surficial geology, Kuskokwim Bay quadrangle.
    NG002Hoare, J.M., and Coonrad, W.L., 1978, Geologic map of the Goodnews and Hagemeister Island quadrangles region, southwestern Alaska: U.S. Geological Survey Open-File Report 78-9-B, scale 1:250,000, 2 sheets. (northwestern part of quadrangle only)
    NG006Box, S.E., 1985, Mesozoic tectonic evolution of the northern Bristol Bay region, southwestern Alaska: Santa Cruz, University of California, Ph.D. dissertation, 163 p., 7 tables, 21 figures, 2 plates.
    NG007Wilson, F.H., Hults, Chad, and Coonrad, W.L., 2006, Edits and field compilation sheets.
    NI002Coonrad, W.L., 1957, Geologic reconnaissance in the Yukon-Kuskokwim Delta region, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Series Map I-223, scale 1:500,000.
    NI003Hoare, J.M., Condon, W.H., Cox, Allan, and Dalrymple, G.B., 1968, Geology, paleomagnetism, and potassium-argon ages of basalts from Nunivak Island, Alaska, in Coats, R.R., Hay, R.L., and Anderson, C.A., eds., Studies in Volcanology-- A memoir in honor of Howel Williams: Geological Society of America Memoir 116, p. 377-413, 1 plate, scale 1:250,000.
    NI004Wilson, F.H., 2007, Reconnaissance mapping of surficial geology, Nunivak Island quadrangle.
    PI002Barth, T.F.W., 1956, Geology and petrology of the Pribilof Islands, Alaska: U.S. Geological Survey Bulletin 1028-F, 160 p., scale 1:63,360.
    ST002Patton, W.W., Jr., Miller, T.P., Berg, H.C., Gryc, George, Hoare, J.M., and Ovenshine, A.T., 1975, Reconnaissance geologic map of St. Matthew Island, Bering Sea, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-642, scale 1:125,000.

    arcs
    Characteristics of the arc features in the geology coverages are coded in the arc attribute table. Table <cov>.aat includes the following items: ARC-CODE, ARC-PARA1, and SOURCE. For explanation of SOURCE, see attribute definitions for polygons. (Source: this data set)

    ARC-CODE
    ARC-CODE is a positive integer value (3 3 I) item in the arc attribute table. Values range discontinuously from 0 to 99. Values match one-for-one with geologic features (such as stratigraphic boundary, fault, etc.). Some ARC-CODE values have additional modifiers in item ARC-PARA1. (Source: this data set)

    ValueDefinition
    1Stratigraphic or intrusive contact, location certain
    2Stratigraphic or intrusive contact, location approximate
    3Stratigraphic or intrusive contact, location inferred, queried
    4Normal fault, location certain; if ARC-PARA1 = 1, then upthrown side is on right from origin
    5Normal fault, location approximate; if ARC-PARA1 = 1, then upthrown side is on right from origin
    6Normal fault, location inferred or queried; if ARC-PARA1 = 1, then upthrown side is on right from origin
    7Shoreline or riverbank
    8Internal contact or phase change; no symbol drawn
    9Boundary of altered zone or hornfels; no symbol drawn
    10Thrust fault, location certain, teeth on right from origin
    11Thrust fault, location approximate; teeth on right from origin
    14Caldera or crater rim
    15Ice contact
    18Internal contact
    30Fault, sense of displacement uncertain, location certain
    31Fault, sense of displacement uncertain, location approximate
    51Concealed contact
    52Concealed normal fault
    53Concealed thrust fault
    60Concealed fault, displacement uncertain
    90Left lateral fault, location certain
    91Left lateral fault, location approximate
    93Lineament
    99Bounding line of coverage

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 data set was prepared by Frederic H. Wilson (USGS), Chad P. Hults (USGS), Solmaz Mohadjer (contractor), Keith A. Labay (contractor), and Nora Shew (USGS)

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

    U.S. Geological Survey
    c/o Frederic H. Wilson
    Geologist
    4200 University Drive
    Anchorage, Alaska 99508-4667
    U.S.A.

    907-786-7448 (voice)
    fwilson@usgs.gov

Why was the data set created?
This data set represents part of a systematic effort to release geologic map data for the United States in a uniform manner. Geologic data in this series has been compiled from a wide variety of sources, published and unpublished, ranging from state and regional geologic maps to large- scale field mapping.

How was the data set created?
  1. Where did the data come from?

  2. What changes have been made?

    Date: 2008 (change 1 of 1)
    Linework for the geology compilation was hand digitized from material of various media and scale. The arcs and polygons were attributed. The spatial databases are provided in UTM projection and geographic coordinates. The native ARC/Info coverages have been exported to an interchange file format, .e00, and also converted to ArcView shape files.

    Person responsible for change:

    U.S. Geological Survey
    c/o Frederic H. Wilson
    Geologist
    4200 University Drive
    Anchorage, Alaska 99508-4667
    U.S.A.

    907-786-7445 (voice)
    fwilson@usgs.gov

How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?

    There were many types of source materials, of varying scale, used to compile this data set. Sources include previously published maps, unpublished mapping, and air photo interpretation. The dates of the mapping range from the 1950's to the 1990's. Vector features were digitized on a large digitizing tablet or on screen. Vector and polygon attributes were assigned based on the original source. The digital data has been checked and the geologic map has been technically reviewed and edited.

  2. How accurate are the geographic locations?

    This data is presented for use at a nominal scale of 1:500,000, although some sources were from 1:250,000 scale mapping.

  3. How accurate are the heights or depths?

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

    The complete data set consists of 10 separate GIS coverages. There is also an associated relational database of geologic units. Each coverage has the extent of a 1:250,000 scale quadrangle. A graphic representation of the database and a report with complete geologic unit descriptions is provided in .pdf format.

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

    Each geology coverage is a network coverage containing attributed arcs and polygons. Each polygon has a coded attribute designating the mapped geologic unit. Faults, stratigraphic contacts, and other linear features are represented as arcs. When a fault is also a stratigraphic contact, only a single arc is present. Dangling arcs may be present (faults, dikes, etc.)

How can someone get a copy of the data set?
Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data.

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

    U.S. Geological Survey
    MS 902 Box 25286 Denver Federal Center
    Lakewood, CO 80225
    U.S.A.

    1-888-ASK-USGS (voice)

  2. What's the catalog number I need to order this data set?

    Open-File Report 2008-1001

  3. What legal disclaimers am I supposed to read?

    This world-wide web publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government of any agency thereof.

  4. How can I download or order the data?

Who wrote the metadata?
Dates:
Last modified: February 20, 2008

Metadata author:
U.S. Geological Survey
c/o Nora Shew
4200 University Drive
Anchorage, Alaska 99508
U.S.A.

907-786-7445 (voice)
nshew@usgs.gov

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

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