Reconnaissance surficial geologic map of the Taylor Mountains quadrangle, southwestern Alaska

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Frequently anticipated questions:

What does this data set describe?

Title:
Reconnaissance surficial geologic map of the Taylor Mountains quadrangle, southwestern Alaska
Abstract:
This dataset represents geologic mapping of the Taylor Mountains 1:250,000 scale quadrangle. It is used to create the mapsheet in SIM 3334, which shows surficial geology at 1:250,000 scale.
  1. How might this data set be cited?
    Wilson, F.H., 2015, Reconnaissance surficial geologic map of the Taylor Mountains quadrangle, southwestern Alaska: Scientific Investigations Map 3334.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -159.00
    East_Bounding_Coordinate: -156.00
    North_Bounding_Coordinate: 61.00
    South_Bounding_Coordinate: 60.00
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2015
    Currentness_Reference: publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Vector Digital Data Set
  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: 4
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -159.0
      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
      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 1/294.9787.
  7. How does the data set describe geographic features?
    arcs
    Characteristics of the line features in feature class tasurf_arc are coded in the attribute table. The attribute table consists of the following items: ARC_CODE, ARC_PARA1, ARC_PARA2, SOURCE, LINEID (not used), and LINE_TYPE. (Source: This dataset)
    ARC_CODE
    ARC_CODE is a numeric short integer field in the attribute table. Values range nonsequentially from 1 to 99. ARC_CODE identifies a stratigraphic boundary, fault, or other linear feature. The ARC_CODE is described by the item LINE_TYPE as listed below. (Source: This dataset)
    ValueDefinition
    2Stratigraphic contact or intrusive contact, location approximate
    3Stratigraphic contact or intrusive contact, location inferred, queried
    4Normal fault, location certain
    5Normal fault, location approximate
    6Normal fault, location inferred, queried
    7Shoreline or riverbank
    8Internal contact or phase change
    9Boundary of altered zone or hornfels
    11Thrust fault, approx., teeth on right from origin
    12Thrust fault, inferred, queried, teeth on right from origin
    19Moraine limit, hachures point to ice
    30Fault, unknown offset, certain location
    32Fault, unknown offset, inferred location
    35High-angle reverse fault, location certain
    36High-angle reverse fault, location approximate
    51Concealed contact
    52Concealed normal fault
    54Concealed high-angle reverse fault
    99Bounding line (neatline) of coverage
    ARC_PARA1
    ARC_PARA1 is a numeric short integer field in the attribute table. Values range from 0 to 1. ARC_PARA1 adds additional meaning to the ARC_CODE. (Source: This dataset)
    ValueDefinition
    0No attribute
    1For ARC_CODE = 4 or 52 indicates upthrown side on the right. For ARC_CODE = 7 indicates single sided stream.
    ARC_PARA2
    ARC_PARA2 is a numeric short integer field in the attribute table. Values range from 0 to 2. ARC_PARA2 is a scratch field that is used to hide lines on the published map for cartographic purposes. (Source: This dataset)
    ValueDefinition
    0No attribute
    1For ARC_CODE = 2 or 3 indicates line between bedrock units that should not be displayed.
    2For ARC_CODE = 2 or 3 indicates line between bedrock and Surficial deposits, undivided that should not be displayed.
    SOURCE
    SOURCE is a text field in the attribute table. Values range nonsequentially from 1 to 99. SOURCE identifies the original source map a feature was digitized from. (Source: This dataset)
    ValueDefinition
    TA001Taylor Mountains 1:250,000 scale topographic map
    TA002Platt, J.N., 1957(?), Unpublished data.
    TA008Blodgett, R.B., Wilson, F.H., Miller, M.L., and Blome, C.D., 2005, Unpublished data
    TA009Clark, A.L., Condon, W.H., Hoare, J.M., and Sorg, D.H., 1970, Analyses of rock and stream-sediment samples from the Taylor Mountains A-6 and southern part of Taylor Mountains B-6 quadrangles, Alaska: U.S. Geological Survey Open-File Report 70-78, 94 p., 1 sheet, scale 1:63,360.
    TA010Clark, A.L., Condon, W.H., Hoare, J.M., and Sorg, D.H., 1970, Analyses of rock and stream-sediment samples from the northern part of the Taylor Mountains B-6 quadrangle, Alaska: U.S. Geological Survey Open-File Report 70-79, 89 p., 1 sheet, scale 1:63,360.
    TA014Burleigh, R.E., 1991, Evaluation of the tin-tungsten greisen mineralization and associated granite at Sleitat Mountain, southwestern Alaska: U.S. Bureau of Mines Open-File Report 35-91, 41 p.
    TA015Wilson, F.H., Mohadjer, Solmaz, Labay, K.A., and Shew, Nora, 2006, Digital datasets for geologic map by Wilson, F.H., Blodgett, R.B., Blome, C.D., Mohadjer, Solmaz, Preller, C.C., Klimasauskas, E.P., Gamble, B.M., and Coonrad, W.L.—Preliminary Integrated Geologic Map Databases for the United States: Digital Data for the Reconnaissance Bedrock Geologic Map for the Northern Alaska Peninsula area, Southwest Alaska: U.S. Geological Survey Open File Report 2006-1303, on-line only. https://pubs.usgs.gov/of/2006/1303/
    TA019Hoare, J.M., and Condon, W.H., 1969-1970, Unpublished data.
    TA020Sainsbury, C.L., and MacKevett, E.M., Jr., 1965, Quicksilver deposits of southwestern Alaska: U.S. Geological Survey Bulletin 1187, 89 p., 8 plates.
    TA021Wilson, F.H., 2015, Reconnaissance surficial geologic map of the Taylor Mountains quadrangle, southwestern Alaska: U.S. Geological Survey Scientific Investigations Map 3334, pamphlet, 1 sheet, scale 1:250,000.
    arcs
    Characteristics of the line features in feature class ta_cirque are coded in the attribute table. The attribute table consists of the following items: ARC_CODE, ARC_PARA1, ARC_PARA2, SOURCE, and LINE_TYPE. (Source: This dataset)
    ARC_CODE
    ARC_CODE is a numeric short integer field in the attribute table. Values range nonsequentially from 1 to 99. ARC_CODE identifies a stratigraphic boundary, fault, or other linear feature. The ARC_CODE is described by the item LINE_TYPE as listed below. (Source: This dataset)
    ValueDefinition
    29Cirque wall, hachures point into basin
    SOURCE
    SOURCE is a text field in the attribute table. Values range nonsequentially from 1 to 99. SOURCE identifies the original source map a feature was digitized from. (Source: This dataset)
    ValueDefinition
    TA021Wilson, F.H., 2015, Reconnaissance surficial geologic map of the Taylor Mountains quadrangle, southwestern Alaska: U.S. Geological Survey Scientific Investigations Map 3334, pamphlet, 1 sheet, scale 1:250,000.
    polygons
    Characteristics of the polygons in feature class tasurf_poly are coded in the attribute table. The attribute table consists of the following items: CLASS, QCLASS, SOURCE, NSACLASS, NSAMOD, NSASUB (not used), SYMBOL, and UNITLABEL (geologic unit label). (Source: This dataset)
    CLASS
    CLASS is a numeric long integer field in the attribute table. Values range nonsequentially from 102 to 9200. Identifies units from original source maps. Attributes not used for this map. (Source: https://pubs.usgs.gov/of/2006/1303/)
    Range of values
    Minimum:102
    Maximum:9200
    QCLASS
    QCLASS is a numeric long integer field in the attribute table. Values range nonsequentially from 0 to 2950. Multiple QCLASS values can be assigned to the same unit. Similar to NSACLASS; allows finer subdivision of Quaternary geologic units. Multiple QCLASS values can be assigned to the same unit. Each QCLASS value listed below is defined by the information from the LABEL field which contains the geologic unit label. (Source: this data set)
    ValueDefinition
    0bu - Bedrock, undivided
    99bu - Bedrock, undivided
    102water
    1000us - Surficial deposits, undivided (Quaternary)
    1050al - Flood-plain deposits (Holocene)
    1060af - Alluvial fan and talus deposits (Holocene)
    1070us - Surficial deposits, undivided (Quaternary)
    1074us - Surficial deposits, undivided (Quaternary)
    1080ls - Landslide deposits (Holocene)
    1100t - Terrace deposits (Quaternary)
    1102t2 - Older terrace deposits (Quaternary)
    1110ac - Abandoned channel deposits (Pleistocene)
    1130fg - Fine-grained deposits
    1150b - Beach deposits
    1220fg - Fine-grained deposits
    1230glf - Glaciolacustrine fan deposits (Pleistocene)
    1240gl - Glaciolacustrine deposits (Pleistocene)
    1250g - Glacial deposits, undivided (Quaternary)
    1251ug - Ground moraine, unnamed glaciations
    1252gc - Glacial deposits in cirques (Holocene or late Wisconsin?)
    1270rg - Rock glacier deposits (Holocene)
    1280sf - Solifluction deposits (Holocene)
    1300nd - Drift, Neoglacial deposits (Holocene)
    1310no - Outwash, Neoglacial deposits
    1350wu - Late Wisconsin glacial deposits (late Pleistocene)
    1382ak - Drift, Aleknagik glaciation
    1383ak - Drift, Aleknagik glaciation
    1389akg - Ground moraine, Aleknagik glaciation
    1391bk - Drift, Brooks Lake glaciation, Kvichak advance
    1392okd - Drift, Okstukuk glaciation
    1395okg - Ground moraine, Okstukuk glaciation
    1401ako - Outwash, Aleknagik glaciation
    1403wuo - Outwash
    1901mhd - Drift, Mak Hill glaciation (Pleistocene)
    1902ig - Drift, Iowithla glaciation (Pleistocene)
    1941mhg - Ground moraine, Mak Hill glaciation
    1942igg - Ground moraine, Iowithla glaciation
    1951mho - Outwash, Mak Hill glaciation
    1952io - Outwash, Iowithla glaciation
    2000ud - Drift, unnamed glaciations (early Pleistocene)
    2010ug - Ground moraine, unnamed glaciations
    2050udn - Drumlins, unnamed glaciations
    2100uo - Outwash, unnamed glaciations
    2750sb - Scoured bedrock
    2950h - Artificial fill (Holocene)
    SOURCE
    SOURCE is a text field in the attribute table. Values range nonsequentially from 1 to 99. SOURCE identifies the original source map a feature was digitized from. (Source: This dataset)
    ValueDefinition
    TA001Taylor Mountains 1:250,000 scale topographic map
    TA002Platt, J.N., 1957(?), Unpublished data.
    TA003Reifenstuhl, R.R., Decker, John, and Coonrad, W.L., 1985, Compilation of geologic data from the Taylor Mountains D-8 quadrangle, southwestern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 85-4, 1 sheet, scale 1:63,360.
    TA006Hoare, 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, 2 sheets, scale 1:250,000.
    TA007Blodgett, R.B. and Wilson, F.H., 2001, Reconnaissance geology north of the Hoholitna River, Taylor Mountains D-1 1:63,360-scale quadrangle, southwestern Alaska, in Gough, L.P., and Wilson, F.H., eds., Geologic studies in Alaska by the U.S. Geological Survey, 1999: U.S. Geological Survey Professional Paper, 1633, p. 73-82.
    TA008Blodgett, R.B., Wilson, F.H., Miller, M.L., and Blome, C.D., 2005, Unpublished data
    TA009Clark, A.L., Condon, W.H., Hoare, J.M., and Sorg, D.H., 1970, Analyses of rock and stream-sediment samples from the Taylor Mountains A-6 and southern part of Taylor Mountains B-6 quadrangles, Alaska: U.S. Geological Survey Open-File Report 70-78, 94 p., 1 sheet, scale 1:63,360.
    TA010Clark, A.L., Condon, W.H., Hoare, J.M., and Sorg, D.H., 1970, Analyses of rock and stream-sediment samples from the northern part of the Taylor Mountains B-6 quadrangle, Alaska: U.S. Geological Survey Open-File Report 70-79, 89 p., 1 sheet, scale 1:63,360.
    TA011Clark, A.L., Condon, W.H., Hoare, J.M., and Sorg, D.H., 1970, Analyses of rock and stream-sediment samples from the Taylor Mountains C-8 quadrangle, Alaska: U.S. Geological Survey Open-File Report 70-80, 110 p., 1 sheet, scale 1:63,360.
    TA014Burleigh, R.E., 1991, Evaluation of the tin-tungsten greisen mineralization and associated granite at Sleitat Mountain, southwestern Alaska: U.S. Bureau of Mines Open-File Report 35-91, 41 p.
    TA015Wilson. F.H., Blodgett, R.B., Blome, C.D., Mohadjer, Solmaz, Preller, C.C., Klimasauskas, E.P., Gamble, B.M., and Coonrad, W.L., in prep., Reconnaissance bedrock geologic map for the northern Alaska Peninsula area, southwest Alaska; including the Dillingham, Iliamna, Lake Clark, Taylor Mountains and the western part of the Kenai and Seldovia 1:250,000-scale quadrangles: U.S. Geological Survey Scientific Investigations Map SIM-????, pamphlet, 111 ms. p., 2 sheets, scale 1:350,000.
    TA017Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p., 9 plates including 1 map, scale about 1:500,000.
    TA019Hoare, J.M., and Condon, W.H., 1969-1970, Unpublished data.
    TA020Sainsbury, C.L., and MacKevett, E.M., Jr., 1965, Quicksilver deposits of southwestern Alaska: U.S. Geological Survey Bulletin 1187, 89 p., 8 plates.
    TA021Wilson, F.H., 2015, Reconnaissance surficial geologic map of the Taylor Mountains quadrangle, southwestern Alaska: U.S. Geological Survey Scientific Investigations Map 3334, pamphlet, 1 sheet, scale 1:250,000.
    NSACLASS
    NSACLASS is a numeric long integer field in the attribute table. Values range nonsequentially from 99 to 9120. Multiple NSACLASS values can be assigned to the same unit. Used to combine and correlate units from different maps throughout the state. See publication https://pubs.usgs.gov/of/2006/1303/ for descriptions of NSACLASS units. Attributes not used for this map. (Source: https://pubs.usgs.gov/of/2006/1303/)
    Range of values
    Minimum:99
    Maximum:9120
    NSAMOD
    NSAMOD is a text field in the polygon attribute table. NSAMOD describes additional characteristics of a NSACLASS unit if known. The same attribute can be assigned to multiple units. Values correspond to NSACLASS units only. Attributes not used for this map. (Source: https://pubs.usgs.gov/of/2006/1303/)
    ValueDefinition
    HFSUnit is hornfelsed
    HFS, QUnit is hornfelsed and queried
    QUnit is queried
    SYMBOL
    Symbol number used to identify color in style file wpgcmykg.style. (Source: this data set)
    Range of values
    Minimum:9
    Maximum:966
    UNITLABEL
    UNITLABEL is a text field in the polygon attribute table which holds the label of the geologic unit. (Source: This dataset)
    ValueDefinition
    usSurficial deposits, undivided (Quaternary)
    hArtificial fill (Holocene)
    sfSolifluction deposits (Holocene)
    lsLandslide deposits (Holocene)
    fgFine-grained deposits
    bBeach deposits
    alFlood-plain deposits (Holocene)
    afAlluvial fan and talus deposits (Holocene)
    tTerrace deposits (Quaternary)
    t2Older terrace deposits (Quaternary)
    acAbandoned channel deposits (Pleistocene)
    gGlacial deposits, undivided (Quaternary)
    gcGlacial deposits in cirques (Holocene or late Wisconsin?)
    ndDrift, Neoglacial deposits (Holocene)
    noOutwash, Neoglacial deposits
    rgRock glacier deposits (Holocene)
    glGlaciolacustrine deposits (Pleistocene)
    glfGlaciolacustrine fan deposits (Pleistocene)
    wuLate Wisconsin glacial deposits (late Pleistocene)
    wuoOutwash
    akDrift, Aleknagik glaciation
    akgGround moraine, Aleknagik glaciation
    akoOutwash, Aleknagik glaciation
    okdDrift, Okstukuk glaciation
    okgGround moraine, Okstukuk glaciation
    bkDrift, Brooks Lake glaciation, Kvichak advance
    igDrift, Iowithla glaciation (Pleistocene)
    iggGround moraine, Iowithla glaciation
    ioOutwash, Iowithla glaciation
    mhdDrift, Mak Hill glaciation (Pleistocene)
    mhgGround moraine, Mak Hill glaciation
    mhoOutwash, Mak Hill glaciation
    udDrift, unnamed glaciations (early Pleistocene)
    ugGround moraine, unnamed glaciations
    uoOutwash, unnamed glaciations
    udnDrumlins, unnamed glaciations
    sbScoured bedrock
    buBedrock, undivided

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 digital coverage was created by Frederic Wilson and Keith Labay.
  3. To whom should users address questions about the data?
    U.S. Geological Survey, ALASKA REGION
    Attn: Frederic H. Wilson
    Research Geologist
    4210 University Drive
    Anchorage, AK
    USA

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

Why was the data set created?

Digital representation of geologic mapping facilitates the presentation and analysis of earth-science data. Digital maps may be displayed at any scale or projection, however the geologic data in this coverage is not intended for use at a scale larger than 1:250,000.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 2015 (process 1 of 1)
    The geology for the quadrangle was compiled from many different sources over a period of years from 1999-2015. Linework was hand digitized from materials of various media and scale. The arcs and polygons were attributed, and topology was checked. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Frederic H. Wilson
    4210 University Drive
    Anchorage, AK
    USA

    907-786-7448 (voice)
    fwilson@usgs.gov
  3. What similar or related data should the user be aware of?

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

  1. How well have the observations been checked?
    Many types of source materials of varying scales were used to compile this data set. Sources include previously published maps, unpublished mapping, and air photo interpretation. Vector features were mostly digitized either by digitizing on screen or on a large format digitizing tablet. Vectors and polygons were attributed and checked. Topology rules were checked.
  2. How accurate are the geographic locations?
    Users of this digital geologic map should respect the intentions of the original mappers and the limitations of the map. This geologic map compilation is intended to be used at a scale of 1:250,000; it is not intended to be used at a more detailed scale.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    These datasets were used to create the map portion of SIM 3334. Text files, tables, graphics, and topography shown on the map sheet are not included.
  5. How consistent are the relationships among the observations, including topology?
    File geodatabase tasurf.gdb contains one feature dataset and three feature classes: tasurf (feature dataset) - tageol_arc (contacts, faults, and other line types); tasurf_cirques (cirques); tageol_poly (geologic units)

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:
Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from this data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    MS902 Box 25286 Denver Federal Center
    Lakewood, CO
    U.S.A.

    1-888-ASK-USGS (voice)
  2. What's the catalog number I need to order this data set? Scientific Investigations Map 3334
  3. What legal disclaimers am I supposed to read?
    This 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 or any agency thereof.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 18-Sep-2015
Last Reviewed: 18-Sep-2015
Metadata author:
U.S. Geological Survey
Attn: Keith Labay
4210 University Drive
Anchorage, AK
USA

907-786-7410 (voice)
klabay@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Generated by mp version 2.9.32 on Fri Sep 18 13:24:13 2015