Online link | https://geo-nsdi.er.usgs.gov/metadata/map-i/2267/metadata.faq.html |
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Description | This dataset was digitized by the U.S. Geological Survey EROS Data Center and U.S. Geological Survey Spokane Field Office for input into an Arc/Info geographic information systsem (GIS). The digital geologic map database can be queried in many ways to pro |
Originators | Harrison, Jack E.; Cressman, E. R.; Whipple, James W.; Kayser, Helen K.; and Derkey, Pamela D. |
Publication | U.S. Geological Survey Miscellaneous Investigations Series Map I-2267 |
The geo_net coverage includes polygons that are map units and open water, and arcs that are contacts, colorboundaries, and shoreline. The geo_net.pat INFO file consists of the following items: GEOCODE--Refers to the type of polygon and is one of the following: map unit code, "lake", or "island". AGE--Refers to the age of the map unit and is one of the following: "HOLOCENE", "HOLOCENE AND LATE WISCONSIN", "LATE WISCONSIN", "EARLY WISCONSIN", "WISCONSIN", "ILLINOIAN", "PLEISTOCENE", "QUATERNARY" OR "PRE-QUATERNARY". MORAINES--A modifier to the map unit indicating that the unit is a moraine and is one of the following: "Ground Moraine", "End Moraine", or "Ground Moraine and end moraine under Lake Michigan." MAP_UNITS--A description of the soils within the map units (see below). MODIFIER--Indicates that the map unit is covered with loess more than 2 m thick ("loess mantle") or if the unit is under water ("submerged"). COLOR--An integer value representing a shade pattern in the shadeset color524.shd used in preparing the plotfile of the map. Items in geo_net.pat are defined as follows: >GEOCODE MAPUNITS, (AGE) > >lc LAKE CLAY AND SILT UNDER LAKE MICHIGAN, HOLOCENE >ls LAKE SAND AND GRAVEL UNDER LAKE MICHIGAN, HOLOCENE > >al ALLUVIUM, HOLOCENE AND LATE WISCONSIN >hs SWAMP DEPOSIT, HOLOCENE AND LATE WISCONSIN >hp PEAT, HOLOCENE AND LATE WISCONSIN >es EOLIAN SHEET SAND, HOLOCENE AND LATE WISCONSIN >ed DUNE SAND, HOLOCENE AND LATE WISCONSIN >el LOESS, HOLOCENE AND LATE WISCONSIN >ca COLLUVIUM AND SHEETWASH ALLUVIUM, HOLOCENE AND LATE WISCONSIN > >lca LAKE CLAY AND SILT, LATE WISCONSIN >lsa LAKE SAND AND GRAVEL, LATE WISCONSIN >gg OUTWASH SAND AND GRAVEL, LATE WISCONSIN >gs OUTWASH SAND, LATE WISCONSIN >kg ICE-CONTACT SAND AND GRAVEL, LATE WISCONSIN > > Tills in Wisconsin, Michigan, Indiana, and Ohio >tc CLAYEY TILL--Ground moraine, LATE WISCONSIN >tc CLAYEY TILL--End moraine, LATE WISCONSIN >tca CLAYEY TILL--Ground moraine, LATE WISCONSIN >tca CLAYEY TILL--End moraine, LATE WISCONSIn >tcb CLAYEY TILL--Ground moraine, LATE WISCONSIN >tcb CLAYEY TILL--End moraine, LATE WISCONSIN >tl LOAMY TILL--Ground moraine, LATE WISCONSIN >tl LOAMY TILL--End moraine, LATE WISCONSIN >tlg LOAMY TILL--Ground moraine, LATE WISCONSIN >tlg LOAMY TILL--End moraine, LATE WISCONSIN >td SANDY LOAMY TILL--Ground moraine, LATE WISCONSIN >td SANDY LOAMY TILL--End moraine, LATE WISCONSIN > > Till Members of Wedron Formation in Illinois and under > Lake Michigan, and Equivalent Tills in Adjacent Wisconsin > and Indiana >tac CLAYEY TILL (MANITOWOC TILL MEMBER UNDER LAKE MICHIGAN), > LATE WISCONSIN >tad CLAYEY TILL (SHOREWOOD TILL MEMBER UNDER LAKE MICHIGAN), > LATE WISCONSIN >tah CLAYEY TILL (WADSWORTH TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT > IN INDIANA)--Ground moraine, LATE WISCONSIN >tah CLAYEY TILL (WADSWORTH TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT > IN INDIANA)--Ground moraine and end moraine under Lake Michigan, > LATE WISCONSIN >tah CLAYEY TILL (WADSWORTH TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT > IN INDIANA)--End moraine, LATE WISCONSIN >tea SANDY LOAMY TILL (HAEGER TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT > IN WISCONSIN)--Ground moraine, LATE WISCONSIN >tea SANDY LOAMY TILL (HAEGER TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT > IN WISCONSIN)--End moraine, LATE WISCONSIN >taj CLAYEY TILL (YORKVILLE TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT > IN INDIANA)--Ground moraine, LATE WISCONSIN >taj CLAYEY TILL (YORKVILLE TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT > IN INDIANA)--End moraine, LATE WISCONSIN >tan CLAYEY TILL (SNIDER TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT IN > INDIANA)--Ground moraine, LATE WISCONSIN >tan CLAYEY TILL (SNIDER TILL MEMBER IN ILLINOIS AND ITS EQUIVALENT IN > INDIANA)--End moraine, LATE WISCONSIN >tkb LOAMY TILL (BATESTOWN TILL MEMBER, MALDEN TILL MEMBER, AND MALDEN > AND SNIDER TILL MEMBERS UNDIFFERENTIATED IN ILLINOIS; BATESTOWN > TILL MEMBER EQUIVALENT IN INDIANA)--Ground moraine, LATE WISCONSIN >tkb LOAMY TILL (BATESTOWN TILL MEMBER, MALDEN TILL MEMBER, AND MALDEN > AND SNIDER TILL MEMBERS UNDIFFERENTIATED IN ILLINOIS; BATESTOWN > TILL MEMBER EQUIVALENT IN INDIANA)--End moraine, LATE WISCONSIN >tkc LOAMY TILL (PIATT TILL MEMBER)--Ground moraine, LATE WISCONSIN >tkc LOAMY TILL (PIATT TILL MEMBER)--End moraine, LATE WISCONSIN >tkd LOAMY TILL (TISKILWA, DELAVAN, AND FAIRGRANGE TILL MEMBERS IN > ILLINOIS; FAIRGRANGE TILL MEMBER EQUIVALENT IN INDIANA) > --Ground moraine, LATE WISCONSIN >tkd LOAMY TILL (TISKILWA, DELAVAN, AND FAIRGRANGE TILL MEMBERS IN > ILLINOIS; FAIRGRANGE TILL MEMBER EQUIVALENT IN INDIANA) > --End moraine, LATE WISCONSIN > > >tkj LOAMY TILL (CAPRON TILL MEMBER OF WINNEBAGO FORMATION IN ILLINOIS > AND EQUIVALENT TILL IN WISCONSIN), EARLY WISCONSIN >tej SANDY LOAMY TILL (ARGYLE TILL MEMBER OF WINNEBAGO FORMATION IN > ILLINOIS AND EQUIVALENT TILL IN WISCONSIN)--Ground moraine, > EARLY WISCONSIN >tej SANDY LOAMY TILL (ARGYLE TILL MEMBER OF WINNEBAGO FORMATION IN > ILLINOIS AND EQUIVALENT TILL IN WISCONSIN)--End moraine, > EARLY WISCONSIN >lcd LAKE SILT AND CLAY, WISCONSIN >lci LAKE SILT AND CLAY, ILLINOIAN >lsp LAKE SAND AND SILT, ILLINOIAN >gsi OUTWASH SILT, SAND, AND GRAVEL, ILLINOIAN >kgi ICE-CONTACT SAND AND GRAVEL, ILLINOIAN > > >tal CLAYEY TILL (RADNOR AND STERLING TILL MEMBERS OF GLASFORD > FORMATION IN ILLINOIS), ILLINOIAN >tag CLAYEY TILL (ESMOND TILL MEMBER OF GLASFORD FORMATION IN ILLINOIS), > ILLINOIAN >tke LOAMY TILL (LEE CENTER TILL MEMBER OF GLASFORD FORMATION IN > ILLINOIS) --Ground moraine, ILLINOIAN >tke LOAMY TILL (LEE CENTER TILL MEMBER OF GLASFORD FORMATION IN > ILLINOIS) --End moraine, ILLINOIAN >tkm LOAMY TILL (OGLE, HULICK, AND VANDALIA TILL MEMBERS OF GLASFORD > FORMATION IN ILLINOIS; OGLE TILL MEMBER EQUIVALENT IN WISCONSIN), > ILLINOIAN >tam CLAYEY TILL (WINSLOW TILL MEMBER OF GLASFORD FORMATION IN ILLINOIS > AND ITS EQUIVALENT IN WISCONSIN)--Ground moraine, ILLINOIAN >tam CLAYEY TILL (WINSLOW TILL MEMBER OF GLASFORD FORMATION IN ILLINOIS > AND ITS EQUIVALENT IN WISCONSIN)--End moraine, ILLINOIAN >cr COLLUVIUM, PLEISTOCENE >cc COLLUVIUM, QUATERNARY >R BEDROCK, PRE-QUATERNARY >f MANMADE > >NOTE: All units listed as EARLY WISCONSIN on the original map are >presently recognized as being ILLINOIAN. Unit lcd listed as WISCONSIN >is probably ILLINOIAN and may be the same map unit as lci. The geo_net.aat INFO file consists of the following item: LTYPE--Refers to the type of arc and is one of the following: "contact," "shoreline," or "map boundary." The gla_lin coverage contains lines of linear glacial features. The gla_lin.aat INFO file consists of the following items: TYPE--Refers to the type of glacial feature described by the arc and is one of the following: "esker," "limit of glacial advance," "buried moraine," "meltwater channel," "shoreline deposits," or "map boundary". MODIFIER--Refers only to ltype = "meltwater channel" and is either "left bank" or "right bank". ACCURACY--Refers to accuracy of location of arcs in the gla_lin coverage and is either "certain" or "inferred". NAME--Refers to the geounit name (taj) of inferred buried end moraine. The gla_pnt coverage contains points that represent drumlins, places where the direction of ice movement is indicated by striations, or the location of important stratigraphic sections. The gla_pnt.pat INFO file consists of the following items: TYPE--Refers to the type of feature shown at the point and is one of the following: "drumlin," "direction of ice movement," "concentric minor moraines," "glacially fluted landforms," "wind direction," or the name of important stratigraphic sections. ANGLE--Refers to the direction of drumlin or ice movement; in degrees measured clockwise from north. MRKANGLE--Negative of ANGLE; useful for plotting srmbols in ARCPLOT. Hydr_lin is a line coverage created after scanning the hydrographic layer that was used in the original paper map. It has no attributes. Topo_lin is a line coverage created after scanning the topographic layer that was used in the original paper map. It has no attributes. Bnd_lin is a line coverage created from 1:2,000,000-scale U.S. Geological Survey Digital Line Graph coverages (DLG). It contains lines representing state boundaries. The bnd_lin.aat INFO file contains the following item: LTYPE--Refers to the type of line and contains the values: "state boundary", or "map boundary". The coverage is annotated with state names along boundaries. Bnd_net is a polygon coverage created from 1:2,000,000-scale DLG coverages and contains political and administrative boundaries. Polygons are attributed in the standard DLG coding scheme and the Federal Information Processing Standards (FIPS). Rd_lin is a line coverage created from 1:2,000,000-scale DLG coverages. The coverage contains lines representing roads in the map area. All DLG attributes have been stripped from the lines except ROUTE_NUMBER1, ROUTE_NUMBER2, ROUTE_NUMBER3, and ROUTE_NUMBER4. Rr_lin is a line coverage created from 1:2,000,000-scale DLG coverages. The coverage contains lines representing railroads in the map area. It has no DLG attributes. Grid_lin is a line coverage created to display projection lines in one degree increments. It has no attributes.
http://pubs.usgs.gov/imap/i-1420/nk-16/I-1420_nk-16_textonly.pdf