Identification_Information: Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: James B. Swinehart (comp.) Originator: Vincent H. Dreeszen(comp.) Originator: Gerald M. Richmond (comp.) Originator: Merlin J. Tipton (comp.) Originator: Richard Bretz (comp.) Originator: Fred V. Steece (comp.) Originator: George R. Hallberg (comp.) Originator: Joseph E. Goebel (comp.) Publication_Date: 2006 Title: Quaternary Geologic Map of the Platte River 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-14) Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1994 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: U.S. Geological Survey Description: Abstract: The Quaternary Geologic Map of the Platte River 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. This map is the product of collaboration between State geological surveys and the U.S. Geological Survey, and is designed for both scientific and practical purposes. It was prepared in two stages. First, separate maps and map explanations of the parts of States included in the quadrangle were prepared by the State compilers. Secondly, these maps were integrated and locally supplemented by the editor. Map unit symbols were revised to a uniform system of classification; map unit descriptions were prepared by the editor from information received from the State compilers and from additional sources. Diagrams of the drainage evolution of the Platte River were prepared by V.L. Souders, J.B. Swinehart, and V.L. Dreeszen. Index map of loess distribution and thickness was prepared by Ann Coe Christiansen. Other diagrams were prepared by the editor. Some differences in mapping or interpretation in different areas were resolved by correspondence; most simply reflect differences in available information or in philosophies of mapping and should encourage further investigation. Surficial deposits have been mapped and described in less than 40 percent of the conterminous United States. Traditionally, mapping of surficial deposits has been focused on glacial, alluvial, eolian, lacustrine, marine, and landslide deposits. Slope and upland deposits have been mapped in detail only in restricted areas. However, much engineering construction and many important problems of land use and land management occur in regions of extensive slope and upland deposits (colluvium and residuum, for example). These materials commonly differ in their physical characteristics. Therefore, an effort has been made to classify, map, and describe them on the basis of published and unpublished subsoil data and the distribution and characteristics of bedrock parent materials. The classification is crude, but represents a first step toward a more refined and useful product. For scientific purposes, the map differentiates Quaternary surficial deposits on the basis of lithology, texture, genesis, stratigraphic relationships, and age, as shown on the correlation diagram and indicated in the map unit descriptions. It provides a base from which a variety of maps relating to Quaternary geologic history can be derived. Nebraska includes the largest and most varied deposits of eolian sand in the United States, and an attempt to map their thicknesses and varieties is made. Widespread loess deposits also are mapped. End moraines of glacial deposits are distinguished in the northeastern part of the quadrangle and slope deposits representing different colluvial and disintegration residual deposits are present in the southern and western parts. Both the colluvium and the disintegration residuum appear to have been extensively thinned and in places stripped by middle and late Pleistocene deflation and sheetwash erosion, the effects of which increase from east to west across the quadrangle. Erosional landforms, such as stream terraces, are not distinguished, but alluvial deposits distinguished as map units may be terraced. Differentiation of sequences of alluvial deposits is not possible at this map scale. Individual landslide deposits also are too small to be shown, but areas in which landslide deposits are abundant are mapped. For practical purposes, this map is a surficial materials map. Materials are distinguished on the basis of lithology or composition, texture or particle size, and local specific characteristics such as swelling clay. It is not a map of soils as soils are recognized and classified in pedology or agronomy. Rather, it is a generalized map of soils as soils are recognized in engineering geology, or of subsoils or parent materials from which pedologic and agronomic soils are formed. As a materials map, it serves as a base from which a wide variety of derivative maps for use in planning for engineering, land use, or land-management projects can be compiled. However, it does not replace detailed site study and analysis. All of the states represented on this map employ extensive test drilling to obtain subsurface data in the loess. In Iowa where loess has been most intensively investigated, major stratigraphic subdivisions separated by intervening paleosols are shown on the map by patterns on the underlying pre-Illinoian till. The patterns are the same as those used in the adjacent Des Moines quadrangle, (Hallberg and others, 1991). Total loess thickness is shown by isopachs; the range in thickness of individual loess units is given in the description of the overlay patterns. The loess patterns and isopachs in Iowa have been extended northward into Minnesota but are less controlled by drilling records. Loess similar to that in Iowa is present west of the Big Sioux River southeast of the limit of Wisconsin glaciation in South Dakota. However, loess isopach data are not available. In Nebraska, more than 1,200 test holes provide the basis for determining loess thickness. However only the thickness of late Wisconsin Peoria Loess and overlying Bignell Loess, commonly only 3 m thick have been determined. Older loesses are known both from drilling and outcrops, but occur at different altitudes on a highly irregular underlying relief. Isopachs on the Peoria Loess display a great variation in thickness and intricacy of landform. Peoria Loess is overlapped to the west by Holocene dune sand. Isopachs for loess in Iowa were compiled from abundant published and unpublished records of test holes and exposures in the files of the Iowa Geological Survey under the direction of G.R. Hallberg. Those for loess in Nebraska were compiled from unpublished maps of the Conservation and Survey Division by Herbert Kollmorgen and E.C. Reed, and on data from Guthrie (1990). Additional data were compiled by J.B. Swinehart, with the assistance of V.H. Dreeszen, J.A. Elder, F.A. Smith, D.A. Eversoll, R.F. Diffendal, and James Goeke. 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: 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 and point features, loess thickness and relative age, 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 United States used three separate projections. To promote uniformity, the projection of this database was changed from Modified Polyconic to Albers Equal Area and all subsequent digital databases will similarly be changed to Albers Equal Area Projection. Illustrations are provided showing an index to International Map of the World 1:1,000,000 topographic series; loess distribution and thickness; relationship of Wisconsin sublobes of the Des Moines and James glacial lobes to sublobes of the Illinoian and pre-Illinoian glacial lobes of the Lake Superior provenance; postulated evolution of Platte River and related drainages; areas of responsibility for the compilation of the map; and 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 ArcInfo format, this metadata file includes some ArcInfo-specific terminology. >The dataset for the Platte River quadrangle consists of 11 coverages and >their .e00 export files. > geo_net > plat_lin > plat_pnt > lss_poly > hydr_lin > topo_lin > bnd_lin > bnd_poly > rd_lin > rr_lin > grid_lin > The dataset also includes an ArcInfo AML, lineset, shadeset, and markerset that will produce the Illustrator or ArcInfo meta 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: 1976 Ending_Date: 1991 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None Planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -102.00 East_Bounding_Coordinate: -96.00 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: 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: Holocene Theme_Keyword: Ice-contact deposits Theme_Keyword: Ice-molded landforms Theme_Keyword: Lacustrine deposits Theme_Keyword: Moraine Theme_Keyword: Outwash deposits Theme_Keyword: Quaternary Theme_Keyword: Quaternary geology Theme_Keyword: Regional geology Theme_Keyword: Sand deposits Theme_Keyword: Sedimentary Rocks 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: Iowa Place_Keyword: Minnesota Place_Keyword: Nebraska Place_Keyword: South Dakota Place_Keyword: United States 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: Cenozoic Temporal_Keyword: Early Wisconsin Temporal_Keyword: Holocene Temporal_Keyword: Illinoian Temporal_Keyword: Late Wisconsin Temporal_Keyword: pre-Illinoian Temporal_Keyword: Pleistocene Temporal_Keyword: Pliocene Temporal_Keyword: Quaternary Temporal_Keyword: Sangamon 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 980, 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: I-1420_nk-14_map.pdf> Browse_Graphic_File_Description: Scan of the original published paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nk-14_plotfile.pdf> Browse_Graphic_File_Description: Plot of the digital files containing map units, linear and point glacial features, hydrology, topography and list of map symbols. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nk-14_correlation.pdf> Browse_Graphic_File_Description: Scan of correlation chart on published paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nk-14_index.pdf> 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: I-1420_nk-14_responsibility.pdf> 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: I-1420_nk-14_lobes.pdf> Browse_Graphic_File_Description: Scan of illustration on the paper map showing the relationship of Wisconsin sublobes of the Des Moines and James glacial lobes to sublobes of the Illinoian and pre-Illinoian glacial lobes of Lake Superior provenance. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nk-14_loess.pdf> Browse_Graphic_File_Description: Scan of illustration on the paper map showing loess distribution and thickness. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nk-14_evolution.pdf> Browse_Graphic_File_Description: Scan of illustration on the paper map showing the postulated evolution of the Platte River and related drainages. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nk-14_textonly.pdf> Browse_Graphic_File_Description: Text description of map units, figure captions, notes on the original map, and sources of information used in preparing the original map. Browse_Graphic_File_Type: PDF Data_Set_Credit: The Quaternary Geologic Map of the Platte River 4° x 6° Quadrangle, United States, I-1420 (NK-14) was compiled by James B. Swinehart and Vincent H. Dreeszen, University of Nebraska, Conservation and Survey Division, Gerald M. Richmond, U.S. Geological Survey; Merlin J. Tipton, Richard Bretz, and Fred V. Steece, South Dakota Geological Survey; George R. Hallberg, Iowa Geological Survey; and Joseph E. Goebel, Minnesota Geological Survey. The state compilations were edited and integrated by Gerald M. Richmond, U.S. Geological Survey. The compilations of geology, linear, and point features were converted to digital form by TechniGraphic Systems, Inc., of Fort Collins, CO, under contract with the U.S. Geological Survey and modified by Charles A. Bush. The hydrography layer, topographic layer, illustrations, word processor files, and DLG coverages were prepared by Bush. Native_Data_Set_Environment: Windows XP 5.1, Intel ArcInfo version 9.1 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. In addition, conflicts pertaining to the placement of features existed between the geology and hydrography hard copy source data, making it necessary to conflate the data sources into a single workable coverage. Cartographic and geologic experience and knowledge were used to provide a best fit solution for this problem. 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, added additional attribution, 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 ArcInfo 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 ArcInfo 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 linear features, and points for all the locations of direction of ice movement, deflation basin, volcanic ash bed localities, and location of significant stratigraphic sections. 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. 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. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: James B. Swinehart (comp.) Originator: Vincent H. Dreeszen(comp.) Originator: Gerald M. Richmond (comp.) Originator: Merlin J. Tipton (comp.) Originator: Richard Bretz (comp.) Originator: Fred V. Steece (comp.) Originator: George R. Hallberg (comp.) Originator: Joseph E. Goebel (comp.) Publication_Date: 1994 Title: Quaternary Geologic Map of the Platte River 4° x 6° Quadrangle, United States Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: I-1420 (NK-14) 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: 1976 Ending_Date: 1991 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: Richmond, 1994 Source_Contribution: Linework and point data for the data sets Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States, 2001 Publication_Date: 2004 Title: County Boundaries of the United States, 2001 Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: National Atlas of the United States 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: 2001 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: usctdd Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 2006 Title: State Boundaries of the United States Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: National Atlas of the United States 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: 2002 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: statesp020 Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 1998 Title: Railroads of the United States Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 199812 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: railrdl020 Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 1999 Title: Major Roads of the United States Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: National Atlas of the United States 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: 1999 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: roadtrl020 Source_Contribution: spatial and attribute information Process_Step: Process_Description: Digitizing contractor scanned source stable-base material for geology, line features, and point features, vectorized scan, converted into ArcInfo coverages and attributed files from published paper map, and produced check plots and coverages. Process_Date: 1998 Process_Step: Process_Description: C.A. Bush scanned stable base material for topography and hydrography layers, vectorized scan, and converted into ArcInfo coverage. Process_Date: 2006 Process_Step: Process_Description: C.A. Bush acquired National Atlas of the United States 1:2,000,000 digital data for roads, railroads, state boundaries, and county boundaries in the United States. Data were 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 county boundaries except the county name and the state name. 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: 2006 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 original printed map and also separated state compilation responsibility and map unit correlation diagrams, other illustrations, cleaned the scans, and converted them to PDF format. Process_Date: 2006 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: 2006 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 plotfile of the digital map (Bush). Process_Date: 2006 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector 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: 500 Ordinate_Resolution: 500 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257 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, shorelines, or map boundaries. 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 symbol, "Lake," or "River." Since unit "tlx" was shown on the paper map in three different patterns to represent ground, end, and stagnation moraines, the unit was changed to "tlx(g)," "tlx(e)," and "tlx(s)" in the database. (See table below.) MAPUNITS--A description of the deposits and materials that make up the map units or the name of the lake or river; blank where not applicable (see below). See pamphlet or text-only file for full unit descriptions. AGE--Refers to the age of the map unit and is one of the following: "HOLOCENE AND LATE WISCONSIN," "HOLOCENE TO ILLINOIAN," "WISCONSIN," "ILLINOIAN," PRE-ILLINOIAN," "PRE-ILLINOIAN AND LATE PLIOCENE," "PLIOCENE," "PLIOCENE AND OLDER," or blank where not applicable. (See table below.) 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 > >al; ALLUVIUM; HOLOCENE AND LATE WISCONSIN >ala; ALLUVIAL SILT, CLAY, SAND, AND GRAVEL; HOLOCENE AND LATE > WISCONSIN >asa; ALLUVIAL SAND, SILT, CLAY, AND GRAVEL; HOLOCENE AND LATE > WISCONSIN >ed; DUNE SAND; HOLOCENE AND LATE WISCONSIN >edl; DUNE SAND--Linear dunes; HOLOCENE AND LATE WISCONSIN >edb; DUNE SAND--Compound and complex barchan dunes; HOLOCENE AND > LATE WISCONSIN >edr; DUNE SAND--Compound and complex barchanoid ridge dunes; > HOLOCENE AND LATE WISCONSIN >edp; DUNE SAND--Parabolic dunes; HOLOCENE AND LATE WISCONSIN >edd; DUNE SAND--Domelike dunes; HOLOCENE AND LATE WISCONSIN >es; EOLIAN SHEET SAND; HOLOCENE AND LATE WISCONSIN >el; LOESS; HOLOCENE AND LATE WISCONSIN >jca; LANDSLIDE DEPOSITS, CLAYEY DISINTEGRATION RESIDUUM, AND > SHEETWASH ALLUVIUM; HOLOCENE AND LATE WISCONSIN >jcb; LANDSLIDE DEPOSITS, CLAYEY DISINTEGRATION RESIDUUM, SHEETWASH > ALLUVIUM, AND GLACIAL DEPOSITS; HOLOCENE AND LATE WISCONSIN >wlb; LOAMY TO CLAYEY SHEETWASH ALLUVIUM AND ASSOCIATED BADLAND > TERRAIN; HOLOCENE AND LATE WISCONSIN >xla; LOAMY DISINTEGRATION RESIDUUM AND SHEETWASH ALLUVIUM; HOLOCENE > AND LATE WISCONSIN >xlt; SILTY CLAY DISINTEGRATION RESIDUUM AND SHEETWASH ALLUVIUM; > HOLOCENE AND LATE WISCONSIN >xce; CLAYEY DISINTEGRATION RESIDUUM AND SHEETWASH ALLUVIUM; HOLOCENE > AND LATE WISCONSIN >xcf; CLAYEY DISINTEGRATION RESIDUUM, SHEETWASH ALLUVIUM, AND GLACIAL > DEPOSITS; HOLOCENE AND LATE WISCONSIN > >cga; CALCRETE- AND GRANITIC-CLAST LOAMY TO GRAVELLY COLLUVIUM; > HOLOCENE TO ILLINOIAN >csl; SANDSTONE-CLAST FINE SANDY COLLUVIUM; HOLOCENE TO ILLINOIAN >csg; SANDSTONE- AND SHALE-CLAST LOAMY COLLUVIUM; HOLOCENE TO > ILLINOIAN >cln; SHALE-, LIMESTONE-, AND CHERT-CLAST SILTY TO CLAYEY COLLUVIUM; > HOLOCENE TO ILLINOIAN >clo; SHALE-, CHALK-, AND CHALKY LIMESTONE-CLAST LOAMY COLLUVIUM; > HOLOCENE TO ILLINOIAN >cls; CHERT-CLAST CLAYEY SILT TO SILTY CLAY LOAM COLLUVIUM; HOLOCENE > TO ILLINOIAN >clu; CALCRETE- AND FINE SANDSTONE-CLAST SILTY CLAY COLLUVIUM; HOLOCENE > TO ILLINOIAN >elb; LOESS; HOLOCENE TO ILLINOIAN > >lca; LAKE SILT AND CLAY; WISCONSIN >nld; LOAMY SOLIFLUCTION DEPOSIT; WISCONSIN >gs; OUTWASH SAND; WISCONSIN >gg; OUTWASH SAND AND GRAVEL; WISCONSIN >kg; ICE-CONTACT SAND AND GRAVEL; WISCONSIN >tlx(g); LOAMY TILL--Ground moraine; WISCONSIN >tlx(e); LOAMY TILL--End moraine; WISCONSIN >tlx(s); LOAMY TILL--Stagnation moraine; WISCONSIN >tla; LOAMY TILL; WISCONSIN >agt; SAND AND GRAVEL OF WHITE AND LITTLE WHITE RIVER TERRACES; > WISCONSIN >agv; SAND AND GRAVEL OF NIOBRARA RIVER TERRACES; WISCONSIN >asg; SAND AND GRAVEL OF REPUBLICAN RIVER TRIBUTARY TERRACES; > WISCONSIN >asv; GRAVELLY SAND OF PLATTE, NORTH PLATTE, AND SOUTH PLATTE RIVER > TERRACES; WISCONSIN > >lci; LAKE SILT AND CLAY; ILLINOIAN >tll; LOAMY TILL;ILLINOIAN > >ast; ALLUVIAL GRAVELLY SAND AND LOCALLY UNDERLYING LACUSTRINE SAND; > ILLINOIAN AND PRE-ILLINOIAN >alo; ALLUVIAL SAND AND GRAVEL; ILLINOIAN AND PRE-ILLINOIAN > >tck; CLAY LOAM TILL; PRE-ILLINOIAN >agp; SANDY SILT, SAND, AND SILTY CLAY; PRE-ILLINOIAN AND LATE PLIOCENE > >asz; ALLUVIAL SAND, PEBBLE GRAVEL, AND LACUSTRINE SAND AND SILT; > EARLY PLEISTOCENE AND PLIOCENE >agw; ALLUVIAL GRAVELLY SAND; EARLY PLEISTOCENE AND PLIOCENE > >agx; ALLUVIAL GRAVEL AND SAND; PLIOCENE > >R; BEDROCK; PLIOCENE AND OLDER > >Lake >River > 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 plat_lin coverage contains lines of linear glacial features. The plat_lin.aat INFO file consists of the following item: LTYPE--Refers to the type of feature described by the arc and is one of the following: "WESTERN EXTENT OF BROADWATER FORMATION IN SUBSURFACE," "OUTER LIMIT OF GLACIAL ADVANCE OR STILLSTAND;" "OUTER LIMIT OF GLACIAL ADVANCE OR STILLSTAND--Inferred;" "OUTER LIMIT OF GLACIAL ADVANCE OR STILLSTAND--Concealed;" "OUTWASH CHANNEL--Left bank;" "OUTWASH CHANNEL--Right bank," "LOESS ISOPACH--;" or "LIMIT OF AREA IN WHICH THICKNESS OF PEORIA LOESS HAS BEEN MEASURED," and "Map boundary." The plat_pnt coverage contains points that represent features shown on the map. The plat_pnt.pat INFO file consists of the following items: PTYPE--Refers to the type of feature shown at the point and is one of the following: "DIRECTION OF ICE MOVEMENT INDICATED BY STRIATIONS; SUCCESSIVE MOVEMENTS BY CROSSED STRIATIONS," "DEFLATION BASIN," "VOLCANIC ASH BED LOCALITY--Lava Creek B (Pearlette S) volcanic ash bed;" "VOLCANIC ASH BED LOCALITY--Mesa Falls (Pearlette S) volcanic ash bed;" "VOLCANIC ASH BED LOCALITY--Huckleberry Ridge (Pearlette B) volcanic ash bed;" "VOLCANIC ASH BED LOCALITY--Pearlette family volcanic ash bed--Not individually identified;" "VOLCANIC ASH BED LOCALITY--Bishop volcanic ash bed;" "LOCATION OF SIGNIFICANT STRATIGRAPHIC SECTION--." (See textonly.pdf for complete section descriptions.) ANGLE--Refers to the direction of feature or ice movement; in degrees measured clockwise from north. MRK--Number of symbol from markerset (glacial.mrk)used to plot the feature. Lss_poly is a polygon coverage containing areas of loess overlying the map area. The lss_poly.pat INFO file contains the following item: TEXT--Refers to the type of loess represented by the polygon and is one of the following: "Peoria loess in Nebraska and southeastern South Dakota; 'Wisconsin' and older loess in Iowa;" "'Wisconsin' loess over Sangamon or late Sangamon paleosol developed in Loveland Loess over Yarmouth paleosol developed in pre-Illinoian clay loam till (tck);" "'Wisconsin' loess over Yarmouth-Sangamon paleosol developed in pre-Illinoian clay loam till (tck);" "'Wisconsin' loess over extensive erosion surface cut on pre-Illinoian till (tck)." Hydr_lin is a line coverage created after scanning and vectorizing the hydrographic layer that was used in the original paper map. It has no user-defined attributes. Topo_lin is a line coverage created after scanning and vectorizing the topographic layer that was used in the original paper map. It has no user-defined attributes. Bnd_lin is a line coverage created from the 1:2,000,000-scale National Atlas of the United States coverage of States Boundaries of the United States. The coverage contains lines representing state boundaries. The bnd_lin.aat INFO file contains the item LTYPE which contains the values "State boundary" or "Map boundary." The coverage is annotated with state names along boundaries. Bnd_poly is a polygon coverage created from the 1:2,000,000-scale National Atlas of the United States coverage of County Boundaries of the United States. Polygons are attributed with state and county names. Rd_lin is a line coverage created from the 1:2,000,000-scale National Atlas of the united states coverage of Major Roads of the United States. The coverage contains lines representing roads in the United States. All DLG attributes have been stripped from the lines except "FEATURE," "NAME," " and "STATE." FEATURE is a listing of the highway type. NAME is a list of of the highway number or numbers. Rr_lin is a line coverage created from 1:2,000,000-scale DLG coverages. The coverage contains lines representing railroads in the U.S. It has no user-defined attributes. Grid_lin is a line coverage created to display projection lines in one-degree increments. It has no user-defined attributes. Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Enterprise Publishing Network 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: NA Contact_Electronic_Mail_Address: NA Resource_Description: Miscellaneous Investigations Series Map I-1420 (NK-19), "Quaternary Geologic Map of the Platte River 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. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the cpyright owner. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE, SHP Format_Version_Number: 9.1 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: ArcInfo 8.3 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-19), "Quaternary Geologic Map of the Platte River 4° × 6° Quadrangle, United States" (printed edition) 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. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the cpyright owner. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. 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://ask.usgs.gov/prices/ for current price of printed edition. Metadata_Reference_Information: Metadata_Date: 20080612 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, MS980, 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