Identification_Information: Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: Jerry A. Lineback (comp.) Originator: Ned K. Bleuer (comp.) Originator: David M. Mickelson (comp.) Originator: William R. Farrand (comp.) Originator: Richard P. Goldthwait (comp.) Publication_Date: 2001 Title: Quaternary Geologic Map of the Chicago 4° x 6° Quadrangle, United States Edition: 1.1 Geospatial_Data_Presentation_Form: (map) Series_Information: Series_Name: Miscellaneous Investigations series Issue_Identification: I-1420 (NK-16) Publication_Information: Publication_Place: Denver, Colorado Publisher: US Geological Survey Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1983 Title: Quaternary geologic atlas of the United States Geospatial_Data_Presentation_Form: (map) Series_Information: Series_Name: Miscellaneous Investigations series Issue_Identification: I-1420 Publication_Information: Publication_Place: Denver, Colorado Publisher: US Geological Survey Description: Abstract: The Quaternary Geologic Map of the Chicago 4° x 6° Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other materials that accumulated or formed during the past 2+ million years, the period that includes all activities of the human species. These materials are at the surface of the earth. They make up the "ground" on which we walk, the "dirt" in which we dig foundations, and the "soil" in which we grow crops. Most of our human activity is related in one way or another to these surface materials that are referred to collectively by many geologists as regolith, the mantle of fragmental and generally unconsolidated material that overlies the bedrock foundation of the continent. The maps were compiled at 1:1,000,000 scale. Purpose: In recent years, surficial deposits and materials have become the focus of much interest by scientists, environmentalists, governmental agencies, and the general public. They are the foundations of ecosystems, the materials that support plant growth and animal habitat, and the materials through which travels much of the water required for our agriculture, our industry, and our general well being. They also are materials that easily can become contaminated by pesticides, fertilizers, and toxic wastes. In this context, the value of the surficial geologic map is evident Supplemental_Information: The digital file was prepared at 1:1,000,000 nominal viewing scale. If the map is enlarged to larger scales (for example, 1:250,000, 1:100,000, or 1:24,000 scale), resolution of the map data is greatly diminished. Enlargement will not restore resolution that was lost by simplification or generalization of data. This database represents an attempt to digitally capture all the geologic information available on the published paper map. Separate coverages are provided for the map unit polygons, linear glacial features, point data for drumlins and type localities, important stratigraphic sections, and line coverages for the hydrology and topography. The description of map units and sources of information are both included as PDF files. The published maps of the Quaternary Geologic Atlas of the U.S. used three separate projections. To promote uniformity, the projection of this database was changed from Lambert Conformal Conic to Albers Equal Area and all subsequent digital databases will similarly be changed to Albers Equal Area Projection. Illustrations are provided showing relationships of the loess distribution and thickness; late Wisconsin glacial lobes, sublobes and advances within lobes and sublobes, and areas of responsibility for the compilation of the map. An illustration is provided showing the correlation of map units. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee- compliant metadata file is intended to document the data set in nonproprietary form, as well as in ARC/INFO format, this metadata file includes some ARC/INFO-specific terminology. >The dataset for the Chicago quadrangle consists of 10 coverages. > geo_net > gla_lin > gla_pnt > hydr_lin > topo_lin > bnd_lin > bnd_net > rd_lin > rr_lin > grid_lin > The dataset also includes an ARC/INFO AML, lineset, shadeset, and markerset that will produce the EPS file of the geology and glacial features and the list of map units. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1978 Ending_Date: 1980 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None Planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -90.00 East_Bounding_Coordinate: -84.00 North_Bounding_Coordinate: 44.00 South_Bounding_Coordinate: 40.00 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute (AGI) Glossary of Geology Theme_Keyword: Alluvium Theme_Keyword: Beach deposits Theme_Keyword: Coastal deposits Theme_Keyword: Colluvium Theme_Keyword: Decomposition residuum Theme_Keyword: Delta Theme_Keyword: Drumlin Theme_Keyword: Dune Theme_Keyword: Eolian deposits Theme_Keyword: Esker Theme_Keyword: Genesis Theme_Keyword: Geologic history Theme_Keyword: Geologic map Theme_Keyword: Geology Theme_Keyword: Glacial deposits Theme_Keyword: Glacial limits Theme_Keyword: Glaciofluvial deposits Theme_Keyword: Glaciotectonic deposits Theme_Keyword: Holocene Theme_Keyword: Ice-contact deposits Theme_Keyword: Ice-molded landforms Theme_Keyword: Lacustrine deposits Theme_Keyword: Marine deposits Theme_Keyword: Marsh deposits Theme_Keyword: Moraine Theme_Keyword: Outwash deposits Theme_Keyword: Quaternary Theme_Keyword: Quaternary geology Theme_Keyword: Regional geology Theme_Keyword: Residuum Theme_Keyword: Sand deposits Theme_Keyword: Saprolite Theme_Keyword: Sedimentary Rocks Theme_Keyword: Solifluction deposits Theme_Keyword: Surficial deposits Theme_Keyword: Surficial geology Theme_Keyword: Swamp deposits Theme_Keyword: Till Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: Canada Place_Keyword: Great Lakes Place_Keyword: Illinois Place_Keyword: Indiana Place_Keyword: Lake Michigan Place_Keyword: Michigan Place_Keyword: Ohio Place_Keyword: United States Place_Keyword: Wisconsin Temporal: Temporal_Keyword_Thesaurus: Richmond, G.M., and Fullerton, D.S., eds., 1986, Introduction, in Quaternary glaciations in the United States of America: Quaternary Science Reviews, v. 5. Temporal_Keyword: Early Wisconsin Temporal_Keyword: Holocene Temporal_Keyword: Illinoian Temporal_Keyword: Late Wisconsin Temporal_Keyword: Pleistocene Temporal_Keyword: Pre Wisconsin Temporal_Keyword: Quaternary Temporal_Keyword: Tertiary Temporal_Keyword: Wisconsin Access_Constraints: None Use_Constraints: Acknowledgment of the Quaternary Geologic Atlas of the United States of America and (or) the U.S. Geological Survey in products derived from these data will be appreciated. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Charles A. Bush Contact_Organization: U.S. Geological Survey Contact_Position: Emeritus Geophysicist Contact_Address: Address_Type: Mailing and physical address Address: Mail Stop 913, Box 25046, Federal Center City: Lakewood State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-4723 Contact_Facsimile_Telephone: (303) 236-0214 Contact_Electronic_Mail_Address: cbush@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Scan of the original published paper map optimized for printing. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Scan of the original published paper map optimized for viewing on screen. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Plot of the digital files containing map units, linear and point glacial features, hydrology, topography and list of map symbols optimized for printing. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Scan of correlation chart on published paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Index map showing location of Quaternary Geologic Atlas of the U.S. quadrangles and quadrangles published digitally and as paper maps. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Scan of map illustration of loess distribution and thickness shown on the paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Scan of illustration of relationships of Late Wisconsin glacial lobes, sublobes, and advances within lobes and sublobes shown on the paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Scan of illustration of state compilation responsibilities shown on the paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Text description of map units, figure captions, important stratigraphic sections, and sources of information used in preparing the original map. Browse_Graphic_File_Type: PDF Data_Set_Credit: The Quaternary Geologic Map of the Chicago 4 Degree x 6 Degree Quadrangle, United States, I-1420 (NK-16) was compiled by Jerry A. Lineback, Illinois State Geological Survey, Ned K. Bleuer, Indiana Geological Survey, David M. Mickelson, Department of Geology and Geophysics, University of Wisconsin, William R. Farrand, Department of Geological Sciences, University of Michigan, and Richard P. Goldthwait, Department of Geology and Mineralogy, Ohio State University. The state compilations were edited and integrated by Gerald M. Richmond and David S. Fullerton, U.S. Geological Survey. The compilations of geology and glacial features were converted to digital form by Techni Graphic Systems, Inc., of Fort Collins, CO, under contract with the U.S. Geological Survey and modified by Charles A. Bush. The hydrography layer was prepared by Sharon Smith, U.S. Geological Survey. Illustrations, wordprocessor files, the topographic layer, and DLG coverages were prepared by Bush. Native_Data_Set_Environment: Windows_NT, 4.0, Intel ARC/INFO version 7.2.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Compilation of geologic data: The accuracy of the map data is dependent on (1) the accuracy of the original source data, (2) the accuracy of transfer of that data to larger scale bases by the compilers, (3) the procedures by which the compilers and the editor/integrator simplified or generalized the data, and (4) the procedures used by, and the objectivity exercised by, the editor/integrator in integration of adjacent parts of the map that were prepared by different compilers. Consequently, aspects of accuracy for the data set cannot be quantified. Digitization and attributing of compilation: Digitizing contractor scanned source stable-base material, vectorized scan, attributed files, and produced check plots and coverages. C.A. Bush proofread check plots and reviewed digital files; made final corrections as needed; produced graphical files and imported them into graphics program to prepare plot file; proofread cartographic product; prepared illustrations and word processing files of descriptions of map units and sources of information. The original paper map was scanned and recreated as PDF files. (The original map was thoroughly reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature.) Logical_Consistency_Report: Polygon and chain-node topology are present. The ARC/INFO commands BUILD and CLEAN were run to ensure the topological consistency of the data set. All polygons are labeled and were tested by using the ARC/INFO command LABELERRORS. All polygons were checked for closure and intersections. Completeness_Report: These coverages contain polygons for all the map units, lines for all the contacts and glacial features, and points for all the locations of localities and drumlins. All geologic data from the original map are expressed on this map. Any differences between elements on the original map and attributed polygons, arcs, and points in this database are inadvertent and should not be construed as deliberate alterations of the data. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The accuracy of location of polygons, lines, and points is consistent with the map scale of 1:1,000,000. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: Jerry A. Lineback (comp.) Originator: Ned K. Bleuer, (comp.) Originator: David M. Mickelson (comp.) Originator: William R. Farrand (comp. Originator: Richard P. Goldthwait (comp.) Publication_Date: 1983 Title: Quaternary Geologic Map of the Chicago 4° x 6° Quadrangle, United States Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: I-1420 (NK-16) Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: mylar separates from printer's negatives for printed map Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1978 Ending_Date: 1980 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: Richmond and Fullerton, 1983 Source_Contribution: Linework and point data for the data sets Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1995 Title: 1:2,000,000-scale Digital Line Graphs -Railroad, Roads, and Boundaries features Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Source_Scale_Denominator: 2000000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1972 Ending_Date: 1994 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: 2MILDLG Source_Contribution: spatial and attribute information Process_Step: Process_Description: Digitizing contractor scanned source stable-base material for geology and glacial layers, vectorized scan, converted into ARC/INFO coverages and attributed files from published paper map, and produced check plots and coverages. Process_Date: 1999 Process_Step: Process_Description: Sharon Smith, U.S. Geological Survey, scanned source stable-base material for hydrology layer, vectorized scan, and converted into ARC/INFO coverage. Process_Date: 2000 Process_Step: Process_Description: Wallace K. Fisk, U.S. Geological Survey, scanned source stable- base material for topography layer, vectorized scan, and converted into ARC/INFO coverage. Process_Date: 2000 Process_Step: Process_Description: C.A. Bush acquired U.S. Geological Survey DLG 1:2,000,000 digital data for roads, railroads, and county boundaries. Data was obtained for individual states, combined, and clipped to cover only the area of the map. Since the files are intended only for the user's reference, and to reduce file size, all attributes were removed from the railroad coverage. All attributes were removed from the roads coverage except U.S. and State highway designations. All attributes were removed from the boundaries coverage except those containing state or county names. A coverage was created containing map boundaries and state and international boundaries. These coverages do not exactly match the base used in preparation of the original Quaternary Atlas map, but are included for the user's convenience. Process_Date: 2001 Process_Step: Process_Description: C.A. Bush created illustration of the index map on the paper map in a drawing program and changed it to reflect the status of conversion of Quaternary Geologic Atlas quadrangles to digital databases. Bush scanned loess distribution, glacial lobe chronology, state and province compilation responsibility and map unit correlation diagrams as given on the printed map and converted them to PDF format. Process_Date: 2001 Process_Step: Process_Description: Map unit descriptions and sources of information as given on the printed map were scanned and converted by an Optical Character Recognition computer program into text files and to PDF format(Bush). Process_Date: 2001 Process_Step: Process_Description: Coverages of geology and glacial features were checked and corrected or changed. Additional items were included in the attributes. AML's were created to plot the data. Plots were imported into graphics program to create a plot of the map (Bush). Process_Date: 2001 Process_Step: Process_Description: Original map was scanned and recreated as PDF file. Process_Date: 2001 Process_Step: Process_Description: Illustrations and text files were checked and edited by Bush. Process_Date: 2001 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 3119 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 7712 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 3120 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 29.5 Standard_Parallel: 45.5 Longitude_of_Central_Meridian: -96 Latitude_of_Projection_Origin: 23 False_Easting: 0.00000 False_Northing: 0.00000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 55 Ordinate_Resolution: 55 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: 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. Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Geologic Division, Central Publications Group Contact_Address: Address_Type: Mailing address Address: U.S. Geological Survey, MS902, Box 25046, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-7684 Contact_Facsimile_Telephone: (303) 236-6287 Contact_Electronic_Mail_Address: troudebush@usgs.gov Resource_Description: Miscellaneous Investigations Series Map I-1420 (NK-16), "Quaternary Geologic Map of the Chicago 4° × 6° Quadrangle, United States" Distribution_Liability: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this data set has been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the USGS as to the accuracy and functioning of the data set and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE, SHP Format_Version_Number: 7.2.1 File_Decompression_Technique: WinZip Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: No cost for the digital files. Technical_Prerequisites: ARC/INFO 7.2.1 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing Address: U.S. Geological Survey Information Services, Box 25286, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: Miscellaneous Investigations Series Map I-1420 (NK-16), "Quaternary Geologic Map of the Chicago 4° × 6° Quadrangle, United States" (printed edition) Distribution_Liability: None Standard_Order_Process: Non-digital_Form: Available as one folded sheet, printed on a four-color press; order from USGS at address listed above. Fees: Call 1-888-ASK-USGS or visit http://mapping.usgs.gov/esic/prices/ for current price of printed edition. Metadata_Reference_Information: Metadata_Date: 20020501 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Charles A. Bush Contact_Organization: U.S. Geological Survey Contact_Position: Emeritus Geophysicist Contact_Address: Address_Type: Mailing Address: U.S. Geological Survey, MS913, Box 25046, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-4723 Contact_Facsimile_Telephone: (303) 236-0214 Contact_Electronic_Mail_Address: cbush@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998