The Upper Midwest States: Minnesota, Wisconsin, Michigan, Illinois and Indiana - The State of Wisconsin

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What does this data set describe?

Title:
The Upper Midwest States: Minnesota, Wisconsin, Michigan, Illinois and Indiana - The State of Wisconsin
Abstract:
These metadata are specifically for the State of Wisconsin, one state in the national compilation of state geologic map databases. The digital geologic map data was prepared by the USGS. Subsequent editing of the spatial data by the USGS was limited to fitting a standardized state boundary to the data, standardizing the arc coding, reprojecting the data, and minor edits of arc or polygon attributes to conform with the paper map. This open-file report is one of several that present the preliminary results of the USGS Mineral Resources Program activity to compile a national-scale geologic map database to support national and regional level projects, including mineral resource and geoenvironmental assessments. The only comprehensive sources of regional- and national-scale geologic maps are state geologic maps with scales ranging from 1:100,000 to 1:1,000,000. Digital versions of these state maps form the core of what is presented here. Because no adequate geologic map exists for the state of Alaska, it is being compiled in regional blocks that also form part of this national database. It is expected that this series will completed by approximately the end of 2007. These maps and databases are being released in blocks of states or, in the case of Alaska, as compiled blocks of 1:250,000-scale quadrangles as chapters in this series. For Alaska, formal maps as well as databases are being published here, whereas for the conterminous U.S. only state databases and preview graphics are presented, because published maps for most states already exist. For Alaska these regional compilations will form the base for compiling a new geologic map of the state. As documented in CONUSdocumentationMW.pdf, standards for the conterminous U.S. are somewhat different than those for Alaska and Hawaii.
Supplemental_Information:
This database consists of five major Arc/Info GIS datasets for each state; - one: geologic map with formations, - two: faults (where present), - three: dikes (where present), - four: miscellaneous line features (where present), - five: miscellaneous point features (where present).
  1. How might this data set be cited?
    Nicholson, Suzanne W., Dicken, Connie L., Foose, Michael P., and Mueller, Julia A.L., 2004, The Upper Midwest States: Minnesota, Wisconsin, Michigan, Illinois and Indiana - The State of Wisconsin: U.S. Geological Survey Open-File Report 2004-1355, U.S. Geological Survey, Reston, VA.

    Online Links:

    This is part of the following larger work.

    Nicholson, Suzanne W., Dicken, Connie L., Foose, Michael P., and Mueller, Julia A.L., 2004, Integrated geologic map databases of the United States: The Upper Midwest States: Minnesota, Wisconsin, Michigan, Illinois and Indiana: U.S. Geological Survey Open-File Report 2004-1355, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -93.205001
    East_Bounding_Coordinate: -85.876194
    North_Bounding_Coordinate: 47.468542
    South_Bounding_Coordinate: 42.161126
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2004
    Currentness_Reference:
    publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  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?
      The map projection used is Lambert Conformal Conic.
      Projection parameters:
      Standard_Parallel: 33
      Standard_Parallel: 45
      Longitude_of_Central_Meridian: -100.0
      Latitude_of_Projection_Origin: 0
      False_Easting: 0.00000
      False_Northing: 0.00000
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.01
      Ordinates (y-coordinates) are specified to the nearest 0.01
      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 1/294.98.
  7. How does the data set describe geographic features?
    wi_geol.pat
    Polygon attribute table for the Wisconsin geologic coverage. (Source: ESRI)
    orig_label
    unmodified map unit symbol from source cover.

    type: character width: 12 output width: 12 (Source: Doug Stoeser)
    ValueDefinition
    AgnMigmatitic gneiss and amphibolite (Late to Early Archean)
    CuCambrian, undivided
    DtTraverse Group
    OaAncell Group
    OmMaquoketa Formation
    Op or OpcPrairie du Chien Group
    OsiSinnipee Group
    SuSilurian, undivided
    WgaGneiss and amphibolite (Late Archean, 2.640-2.750 Ma)
    WgnGneiss, migmatite, and amphibolite (about 2800 Ma)
    WifBanded iron-formation and associated volcanogenic rocks
    WmgLayered metagabbro
    WpPuritan Quartz Monzonite (Late Archean)
    WtTuff breccia schist and minor iron-formation
    WvMetabasalt (Late Archean)
    XAfFault rocks
    XamUnexposed magnetic unit
    XbBadwater Greenstone
    XbaBasaltic and andesitic breccia
    XbcBlair Creek Formation
    XbqBarron Quartzite
    XchChocolay Group, undivided
    XdvgDacite and volcanogenic graywacke
    XfFelsic metavolcanic rocks of 1835- to 1845-Ma age group
    XftFoliated tonalite
    XgGranitic rocks, undivided
    XgaGranitic rocks of 1760-Ma age group
    XgatAthelstane Quartz Monzonite
    XgbGabbro
    XgcGranite near Cherokee (1853 +/- 21 Ma)
    XggGranite-tonalite
    XggnGranite gneiss
    XggrGneissic granite (1,871 +/- 5 Ma)
    XgnGneiss and amphibolite
    XgpPorphyritic granite
    XgrAlkali feldspar granite of 1835 Ma age group
    XgrsSpikehorn Granite and Bush Lake Granites, undivided (1835 +/- 6 Ma)
    XgtGranodiorite-tonalite
    XiIronwood Iron-formation
    XipIronwood Iron-formation of Menominee Group and Palms Formation of Chocolay Group
    XmMichigamme Formation, undivided
    XmcMilladore Volcanic Complex (about 1860 +/- 7 Ma)
    Xmdmetadiabase
    Xmgmetagabbro
    XmiMafic metavolcanic rocks
    XmibBimodal mafic and felsic metavolcanic rocks
    XmifBanded cherty and slaty iron-fromation [of the Michigamme Formation]
    XmmcMenominee and Chocolay Groups, undivided
    XmvMafic to felsic metavolcanic rocks
    XmvlMafic to intermediate flows and pyroclastic rocks [in Michigamme Formation] including Clarksburg Volcanics member
    XpiLower part of Paint River Group
    XpuUpper part of Paint River Group
    Xqquartzite
    Xqdquartz diorite
    Xrrhyolite
    XrgRhyolite at and near Cary Mound and near Brokaw (about 1835 Ma)
    XrhdRhyolite to dacite
    XsvBiotite schist
    XtTyler Formation
    XtgFelsic volcanic and volcanogenic rocks
    XvVolcanic rocks, undivided
    YcCopper Harbor Conglomerate
    YchChequamegon Sandstone
    YcvChengwatana Volcanic Group
    YdiDevil's Island Sandstone
    YfFreda Sandstone
    YfcConglomerate member of Freda Sandstone
    YgbGabbroic rocks of Keweenawan affinity
    YgpGranophyre
    YgrGranite associated with the Mellen complex
    YhRhyolite member of the Hager Formation
    YhfHigh Falls Granite
    YhpQuartz porphyry member of the Hager Formation
    YjJacobsville Sandstone
    YkKallander Creek Volcanics
    YkrUpper rhyolite member of the Kallander Creek Volcanics
    YnNonesuch Shale
    YoOrienta Sandstone
    YogOlivine gabbro of the Mellen complex
    YplvPortage Lake Volcanics
    YpvPorcupine Volcanics
    YsSiemens Creek Volcanics
    YssStettin pluton (about 1520 Ma)
    YwaAnorthosite in the Wolf River Batholith
    YwapAplite in the Wausau Pluton
    YwbBelongia Granite of the Wolf River Batholith
    YweGranite near Big Eau Pleine Reservoir (in the Wausau Pluton)
    YwgWolf River Granite
    YwmPeshtigo Mangerite in the Wolf River batholith
    YwnGranite near Nine Mile Swamp (in the Wausau Pluton)
    YwrRed River Granite (in the Wolf River Batholith)
    YwsQuartz syenite (in the Wausau Pluton)
    YwwgWaupaca Granite (in the Wolf River Batholith)
    waterwater
    sgmc_label
    orig_label + ;n where n= province number (n=0 if no province number)

    type: character width: 16 output width: 16 (Source: Doug Stoeser)
    ValueDefinition
    Agn;0Migmatitic gneiss and amphibolite (Late to Early Archean)
    CAu;0Cambrian, undivided
    Dt;0Traverse Group
    Oa;0Ancell Group
    Om;0Maquoketa Formation
    Op;0 or Opc;0Prairie du Chien Group
    Osi;0Sinnipee Group
    Su;0Silurian, undivided
    Wga;0Gneiss and amphibolite (Late Archean, 2.640-2.750 Ma)
    Wgn;0Gneiss, migmatite, and amphibolite (about 2800 Ma)
    Wif;0Banded iron-formation and associated volcanogenic rocks
    Wmg;0Layered metagabbro
    Wp;0Puritan Quartz Monzonite (Late Archean)
    Wt;0Tuff breccia schist and minor iron-formation
    Wv;0Metabasalt (Late Archean)
    XAf;0Fault rocks
    Xam;0Unexposed magnetic unit
    Xb;0Badwater Greenstone
    Xba;0Basaltic and andesitic breccia
    Xbc;0Blair Creek Formation
    Xbq;0Barron Quartzite
    Xch;0Chocolay Group, undivided
    Xdvg;0Dacite and volcanogenic graywacke
    Xf;0Felsic metavolcanic rocks of 1835- to 1845-Ma age group
    Xft;0Foliated tonalite
    Xg;0Granitic rocks, undivided
    Xga;0Granitic rocks of 1760-Ma age group
    Xgat;0Athelstane Quartz Monzonite
    Xgb;0Gabbro
    Xgc;0Granite near Cherokee (1853 +/- 21 Ma)
    Xgg;0Granite-tonalite
    Xggn;0Granite gneiss
    Xggr;0Gneissic granite (1,871 +/- 5 Ma)
    Xgn;0Gneiss and amphibolite
    Xgp;0Porphyritic granite
    Xgr;0Alkali feldspar granite of 1835 Ma age group
    Xgrs;0Spikehorn Granite and Bush Lake Granites, undivided (1835 +/- 6 Ma)
    Xgt;0Granodiorite-tonalite
    Xi;0Ironwood Iron-formation
    Xip;0Ironwood Iron-formation of Menominee Group and Palms Formation of Chocolay Group
    Xm;0Michigamme Formation, undivided
    Xmc;0Milladore Volcanic Complex (about 1860 +/- 7 Ma)
    Xmd;0metadiabase
    Xmg;0metagabbro
    Xmi;0Mafic metavolcanic rocks
    Xmib;0Bimodal mafic and felsic metavolcanic rocks
    Xmif;0Banded cherty and slaty iron-fromation [of the Michigamme Formation]
    Xmmc;0Menominee and Chocolay Groups, undivided
    Xmv;0Mafic to felsic metavolcanic rocks
    Xmvl;0Mafic to intermediate flows and pyroclastic rocks [in Michigamme Formation] including Clarksburg Volcanics member
    Xpi;0Lower part of Paint River Group
    Xpu;0Upper part of Paint River Group
    Xq;0quartzite
    Xqd;0quartz diorite
    Xr;0rhyolite
    Xrg;0Rhyolite at and near Cary Mound and near Brokaw (about 1835 Ma)
    Xrhd;0Rhyolite to dacite
    Xsv;0Biotite schist
    Xt;0Tyler Formation
    Xtg;0Felsic volcanic and volcanogenic rocks
    Xv;0Volcanic rocks, undivided
    Yc;0Copper Harbor Conglomerate
    Ych;0Chequamegon Sandstone
    Ycv;0Chengwatana Volcanic Group
    Ydi;0Devil's Island Sandstone
    Yf;0Freda Sandstone
    Yfc;0Conglomerate member of Freda Sandstone
    Ygb;0Gabbroic rocks of Keweenawan affinity
    Ygp;0Granophyre
    Ygr;0Granite associated with the Mellen complex
    Yh;0Rhyolite member of the Hager Formation
    Yhf;0High Falls Granite
    Yhp;0Quartz porphyry member of the Hager Formation
    Yj;0Jacobsville Sandstone
    Yk;0Kallander Creek Volcanics
    Ykr;0Upper rhyolite member of the Kallander Creek Volcanics
    Yn;0Nonesuch Shale
    Yo;0Orienta Sandstone
    Yog;0Olivine gabbro of the Mellen complex
    Yplv;0Portage Lake Volcanics
    Ypv;0Porcupine Volcanics
    Ys;0Siemens Creek Volcanics
    Yss;0Stettin pluton (about 1520 Ma)
    Ywa;0Anorthosite in the Wolf River Batholith
    Ywap;0Aplite in the Wausau Pluton
    Ywb;0Belongia Granite of the Wolf River Batholith
    Ywe;0Granite near Big Eau Pleine Reservoir (in the Wausau Pluton)
    Ywg;0Wolf River Granite
    Ywm;0Peshtigo Mangerite in the Wolf River batholith
    Ywn;0Granite near Nine Mile Swamp (in the Wausau Pluton)
    Ywr;0Red River Granite (in the Wolf River Batholith)
    Yws;0Quartz syenite (in the Wausau Pluton)
    Ywwg;0Waupaca Granite (in the Wolf River Batholith)
    water;0water
    unit_link
    composite map label = ST + sgmc_label This creates a unique identifier for every unit in the CONUS (continental United States) covers.

    type: character width: 18 output width: 18 (Source: Doug Stoeser)
    ValueDefinition
    WIAgn;0Migmatitic gneiss and amphibolite (Late to Early Archean)
    WICAu;0Cambrian, undivided
    WIDt;0Traverse Group
    WIOa;0Ancell Group
    WIOm;0Maquoketa Formation
    WIOp;0 or WIOpc;0Prairie du Chien Group
    WIOsi;0Sinnipee Group
    WISu;0Silurian, undivided
    WIWga;0Gneiss and amphibolite (Late Archean, 2.640-2.750 Ma)
    WIWgn;0Gneiss, migmatite, and amphibolite (about 2800 Ma)
    WIWif;0Banded iron-formation and associated volcanogenic rocks
    WIWmg;0Layered metagabbro
    WIWp;0Puritan Quartz Monzonite (Late Archean)
    WIWt;0Tuff breccia schist and minor iron-formation
    WIWv;0Metabasalt (Late Archean)
    WIXAf;0Fault rocks
    WIXam;0Unexposed magnetic unit
    WIXb;0Badwater Greenstone
    WIXba;0Basaltic and andesitic breccia
    WIXbc;0Blair Creek Formation
    WIXbq;0Barron Quartzite
    WIXch;0Chocolay Group, undivided
    WIXdvg;0Dacite and volcanogenic graywacke
    WIXf;0Felsic metavolcanic rocks of 1835- to 1845-Ma age group
    WIXft;0Foliated tonalite
    WIXg;0Granitic rocks, undivided
    WIXga;0Granitic rocks of 1760-Ma age group
    WIXgat;0Athelstane Quartz Monzonite
    WIXgb;0Gabbro
    WIXgc;0Granite near Cherokee (1853 +/- 21 Ma)
    WIXgg;0Granite-tonalite
    WIXggn;0Granite gneiss
    WIXggr;0Gneissic granite (1,871 +/- 5 Ma)
    WIXgn;0Gneiss and amphibolite
    WIXgp;0Porphyritic granite
    WIXgr;0Alkali feldspar granite of 1835 Ma age group
    WIXgrs;0Spikehorn Granite and Bush Lake Granites, undivided (1835 +/- 6 Ma)
    WIXgt;0Granodiorite-tonalite
    WIXi;0Ironwood Iron-formation
    WIXip;0Ironwood Iron-formation of Menominee Group and Palms Formation of Chocolay Group
    WIXm;0Michigamme Formation, undivided
    WIXmc;0Milladore Volcanic Complex (about 1860 +/- 7 Ma)
    WIXmd;0metadiabase
    WIXmg;0metagabbro
    WIXmi;0Mafic metavolcanic rocks
    WIXmib;0Bimodal mafic and felsic metavolcanic rocks
    WIXmif;0Banded cherty and slaty iron-fromation [of the Michigamme Formation]
    WIXmmc;0Menominee and Chocolay Groups, undivided
    WIXmv;0Mafic to felsic metavolcanic rocks
    WIXmvl;0Mafic to intermediate flows and pyroclastic rocks [in Michigamme Formation] including Clarksburg Volcanics member
    WIXpi;0Lower part of Paint River Group
    WIXpu;0Upper part of Paint River Group
    WIXq;0quartzite
    WIXqd;0quartz diorite
    WIXr;0rhyolite
    WIXrg;0Rhyolite at and near Cary Mound and near Brokaw (about 1835 Ma)
    WIXrhd;0Rhyolite to dacite
    WIXsv;0Biotite schist
    WIXt;0Tyler Formation
    WIXtg;0Felsic volcanic and volcanogenic rocks
    WIXv;0Volcanic rocks, undivided
    WIYc;0Copper Harbor Conglomerate
    WIYch;0Chequamegon Sandstone
    WIYcv;0Chengwatana Volcanic Group
    WIYdi;0Devil's Island Sandstone
    WIYf;0Freda Sandstone
    WIYfc;0Conglomerate member of Freda Sandstone
    WIYgb;0Gabbroic rocks of Keweenawan affinity
    WIYgp;0Granophyre
    WIYgr;0Granite associated with the Mellen complex
    WIYh;0Rhyolite member of the Hager Formation
    WIYhf;0High Falls Granite
    WIYhp;0Quartz porphyry member of the Hager Formation
    WIYj;0Jacobsville Sandstone
    WIYk;0Kallander Creek Volcanics
    WIYkr;0Upper rhyolite member of the Kallander Creek Volcanics
    WIYn;0Nonesuch Shale
    WIYo;0Orienta Sandstone
    WIYog;0Olivine gabbro of the Mellen complex
    WIYplv;0Portage Lake Volcanics
    WIYpv;0Porcupine Volcanics
    WIYs;0Siemens Creek Volcanics
    WIYss;0Stettin pluton (about 1520 Ma)
    WIYwa;0Anorthosite in the Wolf River Batholith
    WIYwap;0Aplite in the Wausau Pluton
    WIYwb;0Belongia Granite of the Wolf River Batholith
    WIYwe;0Granite near Big Eau Pleine Reservoir (in the Wausau Pluton)
    WIYwg;0Wolf River Granite
    WIYwm;0Peshtigo Mangerite in the Wolf River batholith
    WIYwn;0Granite near Nine Mile Swamp (in the Wausau Pluton)
    WIYwr;0Red River Granite (in the Wolf River Batholith)
    WIYws;0Quartz syenite (in the Wausau Pluton)
    WIYwwg;0Waupaca Granite (in the Wolf River Batholith)
    WIwater;0water
    source
    An alphanumeric code (e.g. US001) that designates the source material used.

    type: character width: 6 output width: 8 (Source: Doug Stoeser)
    ValueDefinition
    WI001Mudrey, M.G., Jr., Brown, B.A., and Greenberg, J.K., 1982, Bedrock Geologic Map of Wisconsin: University of Wisconsin-Extension, Geological and Natural History Survey, scale= 1:1,000,000
    WI003Sims, P.K., 1992, Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan: U.S. Geological Survey Miscellaneous Investigations Map I-2185, scale= 1:500,000
    WI004Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, Joyce, and Barber-Delach, Robert, 1997, Digital Geologic Map and mineral deposits of the Lake Superior Region, Minnesota, Wisconsin, Michigan: USGS Open-File Report 97-455 (version 3, Nov. 1999), on-line only
    unit_age
    The geologic age from the source map used.

    type: character width: 60 output width: 60 (Source: Doug Stoeser)
    ValueDefinition
    Archean 
    Archean to Early Proterozoic 
    Cambrian 
    Early Proterozoic 
    Late Archean 
    Lower Ordovician 
    Middle Devonian 
    Middle Proterozoic 
    Ordovician 
    Silurian 
    rocktype1
    The predominant lithology found in the formation.

    type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1)
    ValueDefinition
    anorthosite 
    aplite 
    arkose 
    basalt 
    conglomerate 
    dacite 
    diorite 
    dolostone (dolomite) 
    gabbro 
    gabbroid 
    gneiss 
    granite 
    granitic gneiss 
    granodiorite 
    graywacke 
    iron formation 
    limestone 
    mafic metavolcanic rock 
    meta-basalt 
    meta-rhyolite 
    metasedimentary rock 
    metavolcanic rock 
    monzonite 
    mylonite 
    quartzite 
    rhyolite 
    sandstone 
    schist 
    shale 
    siltstone 
    slate 
    syenite 
    tonalite 
    tuff 
    volcanic breccia (agglomerate) 
    water 
    rocktype2
    The second most predominant lithology in the formation.

    type: character width: 40 output width: 40 (Source: Johnson Lith Class 6.1)
    ValueDefinition
    amphibolite 
    andesite 
    anorthosite 
    argillite 
    basalt 
    conglomerate 
    dacite 
    dolostone (dolomite) 
    felsic metavolcanic rock 
    gneiss 
    granodiorite 
    iron formation 
    limestone 
    meta-argillite 
    metasedimentary rock 
    metavolcanic rock 
    migmatite 
    mixed clastic/volcanic 
    pyroclastic 
    sandstone 
    schist 
    shale 
    siltstone 
    slate 
    tonalite 
    tuff 
    ultramafic intrusive rock 
    wi_geol.aat
    Arc attribute table for Wisconsin geologic coverage. (Source: ESRI)
    arc-code
    Unique identifier for the line feature

    type: integer width: 3 output width: 3 (Source: AAT data dictionary)
    ValueDefinition
    1contact, location certain
    7shoreline or riverbank
    30fault, sense of displacement unknown or undefined, location certain
    100fault, sense of displacement unknown or undefined, concealed
    101thrust fault, direction of motion undefined (i.e. teeth not shown), location certain
    124state boundary
    arc-para1
    Used for "decorated" lines where additional information is needed.

    type: integer width: 3 output width: 3 (Source: AAT data dictionary)
    ValueDefinition
    0no additional information
    arc-para2
    "Scratch" field used mostly in Alaska.

    type: integer width: 3 output width: 3 (Source: AAT data dictionary)
    ValueDefinition
    0no additional information
    source
    An alphanumeric code (e.g. US001) that designates the source material used.

    type: character width: 6 output width: 8 (Source: Doug Stoeser)
    ValueDefinition
    WI004Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, Joyce, and Barber-Delach, Robert, 1997, Digital Geologic Map and mineral deposits of the Lake Superior Region, Minnesota, Wisconsin, Michigan: USGS Open-File Report 97-455 (version 3, Nov. 1999), on-line only
    US001Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, CONUSdocumentationMW.pdf)
    Entity_and_Attribute_Overview:
    Coding for polygon attributes:

    NAME: FEATURE: orig_label unmodified map unit symbols from source cover sgmc_label orig_label modified for standard geologic age symbols and an integer code added for province unit_link sgmc_label and a state code identifier source reference to source of data unit_age geologic age rocktype1 predominant lithology rocktype2 second most predominant lithology

    Coding for arc attributes:

    NAME: FEATURE: arc-code unique integer identifier arc-para1 used where additional information is needed arc-para2 scratch field source reference to source of data

    Coding for point attributes:

    NAME: FEATURE: point_feature name of feature on map source reference to source of data

    Coding for dikes (special arcs) attributes:

    NAME: FEATURE: orig_label unmodified map unit symbols from source cover sgmc_label orig_label modified for standard geologic age symbols and an integer code added for province arc-code unique integer identifier dike_lith general lithology dike_age geologic age source reference to source of data

    Entity_and_Attribute_Detail_Citation: ESRI

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Suzanne W. Nicholson
    • Connie L. Dicken
    • Michael P. Foose
    • Julia A.L. Mueller
  2. Who also contributed to the data set?
    State Geologic Map Compilation (SGMC) activity of the National Surveys and Analysis projects of the US Geological Survey Mineral Resources Program.

  3. To whom should users address questions about the data?
    Suzanne W. Nicholson
    U.S. Geological Survey
    12201 Sunrise Valley Dr. MS954
    Reston, VA
    USA

    703-648-6344 (voice)
    swnich@usgs.gov

Why was the data set created?

A primary goal of this work is to develop geologic map datasets with standardized structure and attribution. The database design and standards are documented in CONUSdocumentationMW.pdf of this series. The intent is that contiguous databases can be merged seamlessly and without any additional effort. In addition to a common database structure, the conterminous U.S. state databases (the contiguous 48 states) have been fitted to a set of standard state boundaries so that, when states are merged, they match without slivers or overlap. No attempt has been made to reconcile differences in mapping across state boundaries.

How was the data set created?

  1. From what previous works were the data drawn?
    WI003 (source 1 of 5)
    Sims, P.K., 1992, Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan: U.S. Geological Survey Miscellaneous Investigation Map I-2185, U.S. Geological Survey, Reston, Virginia.

    Online Links:

    • none

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 500,000
    Source_Contribution: provided unit descriptions where available.
    WI004 (source 2 of 5)
    Cannon, W.F., T.H., Kress., Sutphin, D.M., Morey, G.B., Meints, Joyce, and Barber-Delach, Robert, 1997, Digital Geologic Map and mineral deposits of the Lake Superior Region, Minnesota, Wisconsin, Michigan: U.S. Geological Survey Open-File Report OFR 97-455, U.S. Geological Survey, Reston, Virginia.

    Online Links:

    Type_of_Source_Media: digital map
    Source_Scale_Denominator: 500,000
    Source_Contribution: provided unit descriptions where available.
    WI001 (source 3 of 5)
    Mudrey, M.G., Brown, B.A., and Greenberg, J.K., 1982, Bedrock Geologic Map of Wisconsin: none none, University of Wisconsin-Extension, Geological and Natural History Survey, Madison, Wisconsin.

    Online Links:

    • none

    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 1000000
    Source_Contribution: provided unit descriptions where available.
    US001 (source 4 of 5)
    Johnson, Bruce R., and Leveritch, Beth, 1:100,000 Scale State Boundaries of the Conterminous United States.

    Type_of_Source_Media: online
    Source_Scale_Denominator: 100000
    Source_Contribution: Provided linework for state boundaries
    Johnson Lith Class 6.1 (source 5 of 5)
    Johnson, Bruce R., Geologic Map Unit Classification, ver. 6.1.

    Type_of_Source_Media: digital data
    Source_Scale_Denominator: none
    Source_Contribution: Classification scheme used for lithology.
  2. How were the data generated, processed, and modified?
    Date: 2003 (process 1 of 10)
    The purpose of this standardization is to allow all SGMC covers to be seamlessly joined without any additional effort to form regional or national level digital maps. Note that for Alaska, the state is being compiled as blocks of 1:250k quadrangles that will ultimately be used to compile a new state map. Douglas Stoeser and Ric Wilson are co-coordinators for the overall SGMC effort, with Stoeser coordinating work on the mainland states and Wilson coordinating work for Alaska and Hawaii.
    Date: 01-Apr-2004 (process 2 of 10)
    C.L. Dicken obtained the digital geologic map of Wisconsin from the following website: http://pubs.usgs.gov/of/of97-455/

    Dicken extracted the linework for the Wisconsin piece of the dataset and re-projected the coverage into the following:

    projection: Lambert Conformal Conic units: meters datum: NAD27 standard parallel 1: 33 0 0.000 standard parallel 2: 45 0 0.000 central meridian: -100 0 0.000 reference latitude: 0 0 0.000 false easting: 0.00000 false northing: 0.00000

    All attributes were deleted except symbol.

    (Note: Attributes associated with the generation of the coverages were not deleted. PAT - shape, area, perimeter, coverage#, and coverage-id AAT - shape, fnode#, tnode#, lnode#, rnode#, length, coverage#, and coverage-id)

    The values from symbol where then calculated into a new field called orig_label.
    Date: 06-Apr-2004 (process 3 of 10)
    The relevant state outline (arcs) was removed from the coverage and replaced with the arcs from the 1:100,000 Scale State Boundaries of the Conterminous United States.

    This allows for a seamless fit of each state to a standard state boundary base.
    Date: 06-Apr-2004 (process 4 of 10)
    The following attributes were exported from Filemaker as a .dbf: orig_label, map_symbol2, unit_link, reference_id, unit_age, rocktype1, and rocktype2.

    orig_label reflects the original map symbol used on the source map

    map_symbol2 reflects map-symbol1 with the addition of a province number

    unit_link is an auto generated field based on map-symbol2 and the state abbreviation (e.g. IN001) that produces a unique identifier for each map unit

    reference_id was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework and other references used to describe the age or lithologies of the unit.

    unit_age was populated with general age assignment

    rocktype1 records dominant lithology (must be >50% of unit), using standardized data dictionary

    rocktype2 records second most dominant lithology, using standardized data dictionary

    orig_label has the following field names from the source map:

    bed-geo in Illinois map_code in Indiana symbol in Michigan symbol in Wisconsin map_label in Minnesota

    The attributes were then converted using the following structure:

    item name: orig_label width: 12 output: 12 type: c

    item name: sgmc_label width: 16 output: 16 type: c

    item name: unit_link width: 18 output: 18 type: c

    item name: source width: 6 output: 8 type: c

    item name: unit_age width: 60 output: 60 type: c

    item name: rocktype1 width: 40 output: 40 type: c

    item name: rocktype2 width: 40 output: 40 type: c
    Date: 06-Apr-2004 (process 5 of 10)
    Once the .dbf was in the correct format with standardized column widths and data structure, it was converted into a lookup table (.lut) in Arc/Info. Then a joinitem was performed to join the look-up table to the polygon attribute table. orig_label was used as the merge item.
    Date: 02-Apr-20042 (process 6 of 10)
    Next, in preparing the uniform .aat file, the following items were added to the table:

    item name: arc-code width: 3 output: 3 type: i

    item name: arc-para1 width: 3 output: 3 type: i

    item name: arc-para2 width: 3 output: 3 type: i

    item name: source width: 6 output: 8 type: c

    Date: 22-Apr-2004 (process 7 of 10)
    Arc-code was populated using the paper map source to tag the lines using the AAT line type data dictionary (see CONUSdocumentationMW.pdf).

    Arc-para1 was populated when additional information was available such as identifying the upthrown side of a fault or direction of thrusting on a fault. (see CONUSdocumentationMW.pdf)

    Arc-para2 is a scratch field that is used mostly in Alaska.

    Source was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework.

    Date: 26-Apr-2004 (process 8 of 10)
    Once the .aat and the .pat were populated with the correct attributes, the coverage was exported as an .e00 file (wigeol_lcc.e00).

    Then it was unprojected into geographic coordinates and exported again (wigeol_dd.e00).
    Date: 30-Apr-2004 (process 9 of 10)
    The faults were extracted to generate a separate fault file. PUT was the command used to copy the line features from the geology line coverage into a new fault line coverage.

    The data were exported as an .e00 file (wifaults_lcc.e00) and then unprojected into geographic coordinates and exported again (wifaults_dd.e00).
    Date: 30-Apr-2004 (process 10 of 10)
    Finally, the geology lines, geology polygons and fault line coverages were converted into shapefiles; in both geographic coordinates and in Lambert Conformal Conic projection.
  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?
    The values of the attributes ROCKTYPE1 and ROCKTYPE2 were assigned based on the information in the legends of the source maps (most of which are paper). The definitions of these values are described in the draft document Geologic Map Classification version 6.1 (Johnson and others); available at the following website: http://geology.usgs.gov/dm
  2. How accurate are the geographic locations?
    Accuracy of Wisconsin state boundary and those arcs intersecting it: The accuracy of the state boundary arcs is based on the 1:100,000 scale original data used to produce this boundary. (Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, CONUSdocumentationMW.pdf))

    Those internal arcs intersecting the state boundary were extended or shortened as needed to complete polygons, possibly creating a small amount of error.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Bodies of water are classified as water, and the geologic units underlying them are not included in this coverage.
  5. How consistent are the relationships among the observations, including topology?
    All internal polygons were checked for closure with vendor software and on hard copy plots. Overshoots and undershoots have been deleted or corrected as appropriate.

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:
This database is not meant to be used or displayed at any scale other than 1:500,000.

Any hardcopies utilizing these data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by the U.S. Geological Survey.

  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey Information Services Reston-ESIC
    U.S. Geological Survey
    507 National Center
    Reston, Virginia
    USA

    1-888-ASK-USGS or 1-703-648-5953 (voice)
  2. What's the catalog number I need to order this data set? USGS OFR 2004-1355
  3. What legal disclaimers am I supposed to read?
    ny use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the USGS. Although these data have been used by the USGS and have been successfully imported into data base programs, no warranty, expressed or implied, is made by the USGS as to how successfully or accurately the data can be imported into any specific application software running on any specific hardware platform. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. This data base GIS is not meant to be used or displayed at any scale other than 1:500,000.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: Geologic units and structural features in format ARC/INFO export (version 8.3)
      Network links: http://pubs.usgs.gov/of/2004/1355/
    • Cost to order the data: none


Who wrote the metadata?

Dates:
Last modified: 20-May-2004
Metadata author:
U.S. Geological Survey
Attn: Connie L. Dicken
12201 Sunrise Valley Dr. MS954
Reston, VA
USA

703-648-6482 (voice)
cdicken@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://mrdata.usgs.gov/geology/state/metadata/wi.faq.html>
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