Identification_Information: Citation: Citation_Information: Originator: David S. Fullerton Originator: Charles A. Bush Originator: Jean N. Pennell Publication_Date: 200402 Title: Surficial Deposits and Materials in the Eastern and Central United States (East of 102 Degrees West Longitude) Edition: 1.0 Geospatial_Data_Presentation_Form: Map Publication_Information: Publication_Place: Denver, CO Publisher: U.S. Geological Survey Online_Linkage: Description: Abstract: This data set contains surficial geologic units in the Eastern and Central United States, as well as a glacial limit line showing the position of maximum glacial advance during various geologic time periods. The geologic units represent surficial deposits and other surface materials that accumulated or formed during the past 2+ million years, such as soils, alluvium, and glacial deposits. These surface materials are referred to collectively by many geologists as regolith, the mantle of fragmented and generally unconsolidated material that overlies the bedrock foundation of a continent. This data set and the printed map produced from it, U.S. Geological Survey (USGS) Geologic Investigation Series I-2789, were based on 31 published maps in the USGS's Quaternary Geologic Atlas of the United States map series (USGS Miscellaneous Investigations Series I-1420). The data were compiled at 1:1,000,000 scale, to be viewed as a digital map at 1:2,000,000 nominal scale and to be printed as a conventional paper map at 1:2,500,000 scale. Purpose: This data set has been prepared with a degree of detail appropriate for viewing at a scale of 1:2,000,000. Because of the degree of generalization required, the data set is intended for regional and national analysis, rather than for detailed analysis in specific areas. It depicts the surficial deposits and materials at or near the land surface, where most human interaction occurs. It does not depict the bedrock geology, which is shown elsewhere in the National Atlas. No responsibility is assumed by the U.S. Geological Survey in the use of these data. Supplemental_Information: This is not a data set of soils as recognized and classified in agriculture. Rather, it is a generalized representation of soils as recognized in engineering geology, or of substrata or parent materials in which agricultural, agronomic, or pedologic soils are formed. Where surficial deposits or materials are thick, agricultural soils are developed only in the upper part of the engineering soils. Where surficial deposits or materials are very thin, agricultural soils are developed through the entire thickness of a surficial deposit or material. This data set provides a broad overview of the areal distribution of surficial deposits and materials. It identifies and depicts more than 150 types of deposits and materials. In general, the geologic units are divided into two major categories, surface deposits and residual materials. Surface deposits are materials that accumulated or were emplaced after component particles were transported by ice, water, wind, or gravity. The glacial sediments that cover the surface in much of the northern United States east of the Rocky Mountains are in this category, as are the gravel, sand, silt, and clay that were deposited in past and present streams, lakes, and oceans. In contrast, residual materials formed in place, without significant transport of component particles by ice, water, wind, or gravity. They are products of modification or alteration of pre-existing surficial deposits, surficial materials, or bedrock. For example, intense weathering of solid rock by chemical processes may produce a residual surficial material that is greatly transformed from its original physical and chemical state. The Surficial Deposits and Materials in the Eastern and Central United States (East of 102 Degrees West Longitude) data set and its associated printed materials provide information about four major aspects of the geologic units: origin, age, properties, and thickness. The digital data describes the genesis (processes of origin) or environments of deposition for each geologic unit, such as deposits related to glaciation (glacial deposits), flowing water (alluvial deposits), lakes (lacustrine deposits), wind (eolian deposits), or gravity (mass-movement deposits). Also included is information on the age of the deposit; either how long ago the deposits accumulated or were emplaced or how long specific processes have been acting on the materials. Finally, the data describes the chemical, physical, and mechanical or engineering characteristics of the materials. Information on the thickness of deposits or depth to underlying deposits or materials or to bedrock is included in the accompanying descriptive pamphlet, i-2789_p.pdf, which is bundled with the downloadable data and also available at . The data set includes both surficial deposits and materials, and glacial limits. The data are available as shapefiles or Arc/INFO Export files. The data layers are distributed and should be used together. All the data layers were created as Arc/INFO coverages and converted to other formats for distribution purposes. The following files are included: >Export files: >sfgeoem020 - Surficial geology units, polygons and lines >glacagl020 - Detailed glacial limit with line decorations* >glacal020 - Detailed glacial limit without line decorations** >Shapefiles: >sfgeoel020 - Surficial geology units, lines >sfgeoep020 - Surficial geology units, polygons >glacagl020 - Detailed glacial limit with line decorations* >glacall020 - Detailed glacial limit without line decorations** > >* these files are graphic representations of the symbolized line used on > the geologic map. These files should be used to produce appropriately > symbolized graphics. The decorations only appear correctly in Lambert > Azimuthal Equal Area projection. > >** these files are the same as the files marked with * but do not > include the line decorations. They are not available for viewing > online, but are included in the downloadable files. These files > should be used for data analysis. > >Also distributed with the data are the following: >i-2789_p.pdf - a pamphlet describing the map units >color524.shd - the Arc/INFO shadeset referenced in the data > 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, some Arc/INFO-specific terminology is included for clarity and expediency. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19980301 Ending_Date: 20000601 Currentness_Reference: Compilation date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -102.000 East_Bounding_Coordinate: -66.955 North_Bounding_Coordinate: 49.386 South_Bounding_Coordinate: 24.518 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute (AGI) Glossary of Geology Theme_Keyword: Alluvium Theme_Keyword: Beach deposits Theme_Keyword: Clinker Theme_Keyword: Coastal deposits Theme_Keyword: Colluvium Theme_Keyword: Decomposition residuum Theme_Keyword: Delta deposits Theme_Keyword: Disintegration residuum Theme_Keyword: Dune sand Theme_Keyword: End moraine deposits Theme_Keyword: Eolian deposits Theme_Keyword: Estuarine deposits 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: Ground moraine deposits Theme_Keyword: Grus Theme_Keyword: Ice-contact deposits Theme_Keyword: Kame Delta deposits Theme_Keyword: Kame fan deposits Theme_Keyword: Kame moraine deposits Theme_Keyword: Lacustrine deposits Theme_Keyword: Lagoon deposits Theme_Keyword: Landslide deposits Theme_Keyword: Loess Theme_Keyword: Marine deposits Theme_Keyword: Marl Theme_Keyword: Marsh deposits Theme_Keyword: Moraine Theme_Keyword: Outwash deposits Theme_Keyword: Quaternary geology Theme_Keyword: Peat deposits Theme_Keyword: Regional geology Theme_Keyword: Residuum Theme_Keyword: Sand deposits Theme_Keyword: Saprolite Theme_Keyword: Sedimentary rocks Theme_Keyword: Sheet sand Theme_Keyword: Sheetwash alluvium Theme_Keyword: Slackwater deposits Theme_Keyword: Solifluction deposits Theme_Keyword: Stagnation moraine deposits Theme_Keyword: Surficial deposits Theme_Keyword: Surficial geology Theme_Keyword: Swamp deposits Theme_Keyword: Till Place: Place_Keyword_Thesaurus: U.S. Department of Commerce, 1987, Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas (Federal Information Processing Standard 5-2): Washington, DC, National Institute of Standards and Technology. Place_Keyword: Alabama Place_Keyword: Arkansas Place_Keyword: Connecticut Place_Keyword: Delaware Place_Keyword: Florida Place_Keyword: Georgia Place_Keyword: Illinois Place_Keyword: Indiana Place_Keyword: Iowa Place_Keyword: Kansas Place_Keyword: Kentucky Place_Keyword: Louisiana Place_Keyword: Maine Place_Keyword: Maryland Place_Keyword: Massachusetts Place_Keyword: Michigan Place_Keyword: Minnesota Place_Keyword: Mississippi Place_Keyword: Missouri Place_Keyword: Nebraska Place_Keyword: New Hampshire Place_Keyword: New Jersey Place_Keyword: New York Place_Keyword: North Carolina Place_Keyword: North Dakota Place_Keyword: Ohio Place_Keyword: Oklahoma Place_Keyword: Pennsylvania Place_Keyword: Rhode Island Place_Keyword: South Carolina Place_Keyword: South Dakota Place_Keyword: Tennessee Place_Keyword: Texas Place_Keyword: Vermont Place_Keyword: Virginia Place_Keyword: West Virginia Place_Keyword: Wisconsin Place: Place_Keyword_Thesaurus: None Place_Keyword: Allegheny Plateau Place_Keyword: Appalachian Plateau Place_Keyword: Atlantic Coastal Plain Place_Keyword: Central United States Place_Keyword: Eastern United States Place_Keyword: Great Lakes region Place_Keyword: Great Plains Place_Keyword: Gulf Coastal plain Place_Keyword: Mississippi embayment Place_Keyword: New England Place_Keyword: Ouachita mountains Place_Keyword: Ridge-and-Valley province Place_Keyword: Austin quadrangle Place_Keyword: Blue Ridge quadrangle Place_Keyword: Boston quadrangle Place_Keyword: Chesapeake Bay quadrangle Place_Keyword: Chicago quadrangle Place_Keyword: Dakotas quadrangle Place_Keyword: Dallas quadrangle Place_Keyword: Des Moines quadrangle Place_Keyword: Florida Keys quadrangle Place_Keyword: Hatteras quadrangle Place_Keyword: Hudson River quadrangle Place_Keyword: Jacksonville quadrangle Place_Keyword: Lake Erie quadrangle Place_Keyword: Lake Nipigon quadrangle Place_Keyword: Lake of the Woods quadrangle Place_Keyword: Lake Superior quadrangle Place_Keyword: Lookout Mountain quadrangle Place_Keyword: Louisville quadrangle Place_Keyword: Minneapolis quadrangle Place_Keyword: Mobile quadrangle Place_Keyword: Monterrey quadrangle Place_Keyword: Ottawa quadrangle Place_Keyword: Ozark Plateau quadrangle Place_Keyword: Platte River quadrangle Place_Keyword: Quebec quadrangle Place_Keyword: Savannah quadrangle Place_Keyword: Sudbury quadrangle Place_Keyword: Vicksburg quadrangle Place_Keyword: White Lake quadrangle Place_Keyword: Wichita quadrangle Place_Keyword: Winnipeg quadrangle Temporal: Temporal_Keyword_Thesaurus: American Geological Institute (AGI) Glossary of Geology Temporal_Keyword: Holocene Temporal_Keyword: Illinoian Temporal_Keyword: Late Wisconsin Temporal_Keyword: Pleistocene Temporal_Keyword: Pre-Illinoian Temporal_Keyword: Quaternary Temporal_Keyword: Sangamon Temporal_Keyword: Tertiary Temporal_Keyword: Wisconsin Access_Constraints: None Use_Constraints: None. Acknowledgment of the National Atlas of the United States of America and (or) the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David S. Fullerton Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing Address: Mail Stop 913, Box 25046 City: Lakewood State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-1232 Contact_Facsimile_Telephone: 303-236-0214 Contact_Electronic_Mail_Address: fullerton@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: A screen-optimized version (61 MB) of the printed map, including limits of glaciation at 1:2,500,000 scale. Details of this map may be enlarged on screen. Although the digital data are provided in a Geographic projection, this graphic is from a map in a Lambert Azimuthal Equal Area projection with the following parameters: Radius of the sphere of reference, 6370997; Longitude of projection center, -100; and Latitude of projection center, 45. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: A low-resolution (<4 MB) rasterized version of the printed map, including limits of glaciation at 1:2,500,000 scale. This map is best viewed at 75% of actual size. Although the digital data are provided in a Geographic projection, this graphic is from a map in a Lambert Azimuthal Equal Area projection with the following parameters: Radius of the sphere of reference, 6370997; Longitude of projection center, -100; and Latitude of projection center, 45. Browse_Graphic_File_Type: PDF Data_Set_Credit: Geologic compilation by David S. Fullerton; digitization by Charles A. Bush and Jean N. Pennell; digital cartography by Diane Lane, Nancy Shock, and William Sowers. Native_Data_Set_Environment: The files are stored in the UNIX version of Arc/INFO version 7.1.1. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The line attributes were manually checked by assigning unique line types to the lines and then plotting the data with different colors for each line type. The plots then were compared to the source. The polygon attributes were checked by visually comparing the final colored plots to maps of larger scale. Logical_Consistency_Report: Polygon and node topology are present. All polygons were labeled and were tested by using the Arc/INFO command LABELERRORS. All polygons were checked for closure and intersections by using Arc/INFO routines (labelerror, nodeerror, intersecterror, dangles). Completeness_Report: These files contain surficial geologic unit boundaries and codes for all of the conterminous United States east of 102 degrees West longitude, as well as lines showing the limit of maximum glacial advance for the same area. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The accuracy of the original compilation was checked by comparison to maps in the 1:1,000,000-scale U.S. Geological Survey Quaternary Geologic Atlas of the United States map series (I-1420). Lineage: Source_Information: Source_Citation: Citation_Information: Originator: David W. Moore (ed. and comp.) Originator: Gerald M. Richmond (ed.) Originator: Ann Coe Christiansen (ed.) Originator: E.G. Wermund, Jr. (comp.) Publication_Date: 1993 Title: Quaternary Geologic Map of the Austin 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: I-1420 (NH-14) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NH-14 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed. and comp.) Originator: David S. Fullerton (ed. and comp.) Originator: Ann Coe Christiansen (ed.) Originator: Alan D. Howard (comp.) Originator: Robert E. Behling (comp.) Originator: Walter H. Wheeler (comp.) Originator: Raymond B. Daniels (comp.) Originator: W C Swadley (comp.) Originator: Richard P. Goldthwait (comp.) Originator: William D. Sevon (comp.) Originator: Robert A. Miller (comp.) Publication_Date: 1991 Title: Quaternary Geologic Map of the Blue Ridge 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NJ-17) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NJ-17 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed. and comp.) Originator: David S. Fullerton (ed. and comp.) Originator: Joseph H. Hartshorn (comp.) Originator: Woodrow B. Thompson (comp.) Originator: William F. Chapman (comp.) Originator: Robert F. Black (comp.) Originator: Douglas R. Grant (comp.) Publication_Date: 1991 Title: Quaternary Geologic Map of the Boston 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NK-19) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NK-19 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: David L. Weide (ed.) Originator: Emery T. Cleaves (comp.) Originator: John D. Glaser (comp.) Originator: Alan D. Howard (comp.) Originator: Gerald H. Johnson (comp.) Originator: Walter H. Wheeler (comp.) Originator: William D. Sevon (comp.) Originator: Sheldon Judson (comp.) Originator: James P. Owens (comp.) Originator: Pamela C. Peebles (comp.) Publication_Date: 1987 Title: Quaternary Geologic Map of the Chesapeake Bay 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NJ-18) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1987 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NJ-18 Source_Contribution: Spatial and attribute information. 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: Map I-1420 (NK-16) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1983 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NK-16 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David S. Fullerton (ed. and comp.) Originator: John P. Bluemle (comp.) Originator: Lee Clayton (comp.) Originator: Fred V. Steece (comp.) Originator: Merlin J. Tipton (comp.) Originator: Richard Bretz (comp.) Originator: Joseph E. Goebel (comp.) Publication_Date: 1995 Title: Quaternary Geologic Map of the Dakotas 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NL-14) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NL-14 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed. and comp.) Originator: Ann Coe Christiansen (ed.) Originator: Kenneth V. Luza (comp.) Originator: Katheryn M. Jensen (comp.) Originator: William D. Fishman (comp.) Originator: E. G. Wermund, Jr. (comp.) Publication_Date: 1994 Title: Quaternary Geologic Map of the Dallas 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NI-14) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NI-14 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: Ann Coe Christiansen (ed.) Originator: George R. Hallberg (comp.) Originator: Jerry A. Lineback (comp.) Originator: David M. Mickelson (comp.) Originator: James C. Knox (comp.) Originator: Joseph E. Goebel (comp.) Originator: Howard C. Hobbs (comp.) Originator: John W. Whitfield (comp.) Originator: Ronald A. Ward (comp.) Originator: John D. Boellstorf (comp.) Originator: James B. Swinehart (comp.) Originator: Vincent H. Dreeszen (comp.) Publication_Date: 1991 Title: Quaternary Geologic Map of the Des Moines 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NK-15) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NK-15 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: David L. Weide (ed. and comp.) Originator: Thomas M. Scott (comp.) Originator: Michael S. Knapp (comp.) Publication_Date: 1986 Title: Quaternary Geologic Map of the Florida Keys 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NG-17) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1986 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NG-17 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: David L. Weide (ed.) Originator: Gerald H. Johnson (comp.) Originator: Pamela C. Peebles (comp.) Publication_Date: 1986 Title: Quaternary Geologic Map of the Hatteras 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NI-18) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1986 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NI-18 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David S. Fullerton (ed. and comp.) Originator: William D. Sevon (comp.) Originator: Ernest H. Muller (comp.) Originator: Sheldon Judson (comp.) Originator: Robert F. Black (comp.) Originator: Phillip W. Wagner (comp.) Originator: Joseph H. Hartshorn (comp.) Originator: William F. Chapman (comp.) Originator: William D. Cowan (comp.) Publication_Date: 1992 Title: Quaternary Geologic Map of the Hudson River 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NK-18) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1992 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NK-18 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: David L. Weide (ed. and comp.) Originator: Thomas M. Scott (comp.) Originator: Michael S. Knapp (comp.) Originator: Michael S. Friddell (comp.) Publication_Date: 1986 Title: Quaternary Geologic Map of the Jacksonville 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NH-17) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1986 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NH-17 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David S. Fullerton (ed. and comp.) Originator: Gerald M. Richmond (ed.) Originator: William R. Cowan (comp.) Originator: William D. Sevon (comp.) Originator: Richard P. Goldthwait (comp.) Originator: William R. Farrand (comp.) Originator: Ernest H. Muller (comp.) Originator: Robert E. Behling (comp.) Originator: Jay A. Stravers (comp.) Publication_Date: 1991 Title: Quaternary Geologic Map of the Lake Erie 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NK-17) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NK-17 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David S. Fullerton (ed. and comp.) Originator: Edward V. Sado (comp.) Originator: William R. Farrand (comp.) Publication_Date: 1994 Title: Quaternary Geologic Map of the Lake Nipigon 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Quaternary Geologic Atlas of the United States Issue_Identification: Map I-1420 (NM-16) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NM-16 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David S. Fullerton (ed. and comp.) Originator: Edward V. Sado (comp.) Originator: Joseph E. Goebel (comp.) Originator: Susan M. Ringrose (comp.) Publication_Date: 1995 Title: Quaternary Geologic Map of the Lake Of The Woods 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NM-15) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1995 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NM-15 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: William R. Farrand (comp.) Originator: David M. Mickelson (comp.) Originator: W. Richard Cowan (comp.) Originator: Joseph E. Goebel (comp.) Publication_Date: 1984 Title: Quaternary Geologic Map of the Lake Superior 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NL-16) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1984 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NL-16 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: Robert A. Miller (comp.) Originator: Stuart W. Maher (comp.) Originator: Charles W. Copeland, Jr. (comp.) Originator: Katherine F. Rheams (comp.) Originator: Thornton LeHeathery (comp.) Originator: William A. Gilliland (comp.) Originator: Michael S. Friddell (comp.) Originator: Arnie K. Van Nostrand (comp.) Originator: Walter H. Wheeler (comp.) Originator: Drew F. Holbrook (comp.) Originator: William V. Bush (comp.) Publication_Date: 1988 Title: Quaternary Geologic Map of the Lookout Mountain 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NI-16) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1988 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NI-16 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed. and comp.) Originator: David S. Fullerton (ed.) Originator: Henry H. Gray (comp.) Originator: Ned K. Bleuer (comp.) Originator: Jerry A. Lineback (comp.) Originator: W.C. Swadley (comp.) Originator: Robert A. Miller (comp.) Originator: Richard P. Goldthwait (comp.) Originator: Ronald A. Ward (comp.) Publication_Date: 1991 Title: Quaternary Geologic Map of the Louisville 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NJ-16) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NJ-16 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: Joseph E. Goebel (comp.) Originator: David M. Mickelson (comp.) Originator: William R. Farrand (comp.) Originator: Lee Clayton (comp.) Originator: James C. Knox (comp.) Originator: Adam Cahow (comp.) Originator: Howard C. Hobbs (comp.) Originator: Matt S. Walton, Jr. (comp.) Publication_Date: 1983 Title: Quaternary Geologic Map of the Minneapolis 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NL-15) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1983 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NL-15 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: David L. Weide (ed.) Originator: Charles W. Copeland, Jr. (comp.) Originator: Katherine F. Rheams (comp.) Originator: Thornton L. Neathery (comp.) Originator: William A. Gilliland (comp.) Originator: Walter Schmidt (comp.) Originator: William C. Clark, Jr. (comp.) Originator: David E. Pope (comp.) Publication_Date: 1988 Title: Quaternary Geologic Map of the Mobile 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NH-16) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1988 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NH-16 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David W. Moore (ed. and comp.) Originator: Gerald M. Richmond (ed.) Originator: Edmund G. Wermund, Jr. (comp.) Publication_Date: 1993 Title: Quaternary Geologic Map of the Monterrey 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NG-14) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NG-14 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David S. Fullerton (ed. and comp.) Originator: Nelson R. Gadd (comp.) Originator: J.J. Veillette (comp.) Originator: Phillip W. Wagner (comp.) Originator: William F. Chapman (comp.) Publication_Date: 1993 Title: Quaternary Geologic Map of the Ottawa 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NL-18) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NL-18 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David L. Weide (ed.) Originator: John W. Whitfield (comp.) Originator: Ronald A. Ward (comp.) Originator: Jane E. Denne (comp.) Originator: Drew F. Holbrook (comp.) Originator: William V. Bush (comp.) Originator: Jerry A. Lineback (comp.) Originator: Kenneth V. Luza (comp.) Originator: Katheryn M. Jensen (comp.) Originator: William D. Fishman (comp.) Publication_Date: 1993 Title: Quaternary Geologic Map of the Ozark Plateau 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NJ-15) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NJ-15 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed. and comp.) Originator: James B. Swinehart (comp.) Originator: Vincent H. Dreeszen (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: Map I-1420 (NK-14) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NK-14 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed. and comp.) Originator: H.W. Borns, Jr. (comp.) Originator: N.R. Gadd (comp.) Originator: Pierre LaSalle (comp.) Originator: Ghismond Martineau (comp.) Originator: Luc Chauvin (comp.) Originator: R.J. Fulton (comp.) Originator: W.F. Chapman (comp.) Originator: W.P. Wagner (comp.) Originator: D.R. Grant (comp.) Publication_Date: 1984 Title: Quaternary Geologic Map of the Quebec 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NL-19) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1984 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NL-19 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: David L. Weide (ed.) Originator: Donald J. Colquhoun (comp.) Originator: Michael S. Friddell (comp.) Originator: Walter H. Wheeler (comp.) Originator: Raymond B. Daniels (comp.) Originator: Joel P. Gregory (comp.) Originator: Robert A. Miller (comp.) Originator: Amy K. Van Nostrand (comp.) Publication_Date: 1987 Title: Quaternary Geologic Map of the Savannah 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NI-17) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1987 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NI-17 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David S. Fullerton (ed. and comp.) Originator: Edward V. Sado (comp.) Originator: C.L. Baker (comp.) Originator: William R. Farrand (comp.) Publication_Date: 1993 Title: Quaternary Geologic Map of the Sudbury 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NL-17) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NL-17 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David S. Fullerton (ed.) Originator: David L. Weide (ed.) Originator: Drew F. Holbrook (comp.) Originator: William A. Gilliland (comp.) Originator: Kenneth V. Luza (comp.) Originator: David E. Pope (comp.) Originator: E. Gerald Wermund (comp.) Originator: Robert A. Miller (comp.) Originator: William V. Bush (comp.) Originator: Katheryn N. Jensen (comp.) Originator: William D. Fishman (comp.) Publication_Date: 1990 Title: Quaternary Geologic Map of the Vicksburg 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NI-15) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1990 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NI-15 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: David L. Weide (ed.) Originator: David W. Moore (ed.) Originator: David E. Pope (comp.) Originator: William A. Gilland (comp.) Originator: E.G. Wermund (comp.) Publication_Date: 1990 Title: Quaternary Geologic Map of the White Lake 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NH-15) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1990 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NH-15 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed. and comp.) Originator: Ann Coe Christiansen (ed.) Originator: Jane E. Denne (comp.) Originator: Kenneth V. Luza (comp.) Originator: Katheryn M. Jensen (comp.) Originator: E.G. Wermond, Jr. (comp.) Originator: William D. Fishman(comp.) Publication_Date: 1993 Title: Quaternary Geologic Map of the Wichita 4° X 6° Quadrangle, United States Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NJ-14) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1993 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NJ-14 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: David S. Fullerton (ed. and comp.) Originator: Susan M. Ringrose (comp.) Originator: Lee Clayton (comp.) Originator: Bryan T. Schreiner (comp.) Originator: Joseph E. Goebel (comp.) Publication_Date: 2000 Title: Quaternary Geologic Map of the Winnepeg 4° X 6° Quadrangle, United States and Canada Geospatial_Data_Presentation_Form: Map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: Map I-1420 (NM-14) Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: Mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NM-14 Source_Contribution: Spatial and attribute information. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unpublished material Title: Streams and Waterbodies of the United States Type_of_Source_Media: Internal USGS computer Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: Distribution date Source_Citation_Abbreviation: Hydro Source_Contribution: Spatial information Process_Step: Process_Description: Each 1:1,000,000 scale, 4° x 6° map of the Quaternary Geologic Atlas map series was simplified (e.g. some small or narrow units were deleted; two or more geologic units were combined as a single map unit). On some quadrangles, units were revised or modified to accommodate information that was not available when the source maps were published (e.g., the age of a deposit subsequently may have been revised). The contacts of the simplified or revised map units were inked on a paper copy of each 4° x 6° quadrangle. Letter symbols were assigned to the new map units as described below. The number of units in this data set is much smaller than the total number of map units found on the 4° x 6° quadrangles on which the data set is based. The individual map unit descriptions for each published map were first sorted by origin (e.g., eolian deposits, alluvium, solution residuum); then by age (e.g., Holocene, late Pleistocene and middle Pleistocene); and then by particle size or texture, lithology or composition, engineering properties, stratigraphic relationships, and other information in the unit descriptions. The resulting map unit groupings were assigned unit names and arbitrary letter symbols for the purpose of this data set. Some units are greatly simplified from their original representation on the 4° x 6° quadrangles. For example, unit cl in this data set was originally represented by 13 different map units on 11 4° x 6° quadrangles. All 13 units were colluvium derived from clastic rocks (conglomerate, sandstone, quartzitic sandstone, siltstone, shale) in various combinations. Generalized and simplified unit descriptions for the surficial geology data set were compiled from the original map unit descriptions that accompanied the 4° x 6° quadrangles. These descriptions are published in a separate pamphlet, i-2789_p.pdf. National Atlas hydrographic information for each 4° x 6° quadrangle was converted to the same projection as was used for the quadrangle, and printed in blue on mylar at 1:1,000,000 scale. The mylar was placed over the inked paper map and aligned using the hydrographic features that appeared on both. The contacts of surficial deposits and materials in and adjacent to major valleys were traced onto the overlay in increments. Working one square inch at a time, the geologic contacts were "fitted" within major valleys. When the surficial deposit contacts in and adjacent to all of the major valleys had been transferred to the mylar base, the mylar and paper map were aligned using the hydrography, surficial geology, and other features, and the contacts for areas between valleys were "fitted", also working one square inch at a time. The limits of selected glacial advances indicated on the paper maps also were transferred to the mylar overlays. These lines were used for most of the glacial limits file, but were altered at some locations to incorporate more recent, unpublished geologic mapping at 1:1,000,000 scale or larger A paper copy of the completed mylar quadrangle map was produced. Letter symbols were added to the paper map and the map units were differentiated by contrasting colors (colored pencil). The mylar plots of the geology were scanned, vectorized, and converted into Arc/INFO coverages. Polygons and lines were attributed using the colored paper map as a reference. The data files for the individual quadrangles were converted to the same projection, appended to one another, and edgematched. The geology was reconciled along the borders of the adjacent quadrangles, and the combined map was then converted to the Lambert-Azimuthal Equal Area projection. Selected lakes and rivers were added from the hydrologic coverage. Errors in polygon labeling were checked using the labelerror routine in ARCPLOT. Node errors were checked using ARCEDIT routines. Colored plots were made for final visual checks of the overall file. The files were converted to shapefile format for distribution as part of the National Atlas of the Untied States. Source_Used_Citation_Abbreviation: NG-14 Source_Used_Citation_Abbreviation: NG-17 Source_Used_Citation_Abbreviation: NH-14 Source_Used_Citation_Abbreviation: NH-15 Source_Used_Citation_Abbreviation: NH-16 Source_Used_Citation_Abbreviation: NH-17 Source_Used_Citation_Abbreviation: NI-14 Source_Used_Citation_Abbreviation: NI-15 Source_Used_Citation_Abbreviation: NI-16 Source_Used_Citation_Abbreviation: NI-17 Source_Used_Citation_Abbreviation: NI-18 Source_Used_Citation_Abbreviation: NJ-14 Source_Used_Citation_Abbreviation: NJ-15 Source_Used_Citation_Abbreviation: NJ-16 Source_Used_Citation_Abbreviation: NJ-17 Source_Used_Citation_Abbreviation: NJ-18 Source_Used_Citation_Abbreviation: NK-14 Source_Used_Citation_Abbreviation: NK-15 Source_Used_Citation_Abbreviation: NK-16 Source_Used_Citation_Abbreviation: NK-17 Source_Used_Citation_Abbreviation: NK-18 Source_Used_Citation_Abbreviation: NK-19 Source_Used_Citation_Abbreviation: NL-14 Source_Used_Citation_Abbreviation: NL-15 Source_Used_Citation_Abbreviation: NL-16 Source_Used_Citation_Abbreviation: NL-17 Source_Used_Citation_Abbreviation: NL-18 Source_Used_Citation_Abbreviation: NL-19 Source_Used_Citation_Abbreviation: NM-14 Source_Used_Citation_Abbreviation: NM-15 Source_Used_Citation_Abbreviation: NM-16 Source_Used_Citation_Abbreviation: Hydro Process_Date: 2000 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Charles A. Bush Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing Address: Mail Stop 913, Box 25046 City: Lakewood 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 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 64907 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 20701 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 771 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 91 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.002 Longitude_Resolution: 0.002 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Surficial geologic map unit (described by Sfgeoem020.pat or Sfgeoep020.dbf) Entity_Type_Definition: Surficial materials such as soils, deposits, and residual materials. These materials are distinguished in part on the basis of particle size or texture, particle lithology or composition, and other physical, chemical, and engineering characteristics. The surficial units are soils which are recognized in engineering geology, or are substrata or parent materials in which agricultural soils are formed. The textural or particle size divisions (e.g., clay, sand, pebbles, boulders) and the matrix nomenclature (e.g., loamy sand, clay loam, silty clay) of the U.S. Department of Agriculture are used here to ensure uniformity of terminology. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Shape Attribute_Definition: The representation of the entity in the data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Polygon Enumerated_Domain_Value_Definition: 2-dimensional element. Enumerated_Domain_Value_Definition_Source: ESRI GIS software Attribute: Attribute_Label: Area Attribute_Definition: The size of the shape in coverage units. In the distributed file, coverage units represent square decimal degrees. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00000 Range_Domain_Maximum: 11.48569 Attribute: Attribute_Label: Perimeter Attribute_Definition: The perimeter of the shape in coverage units. In the distributed file, coverage units represent decimal degrees. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00150 Range_Domain_Maximum: 159.14767 Attribute: Attribute_Label: Sfgeoem020# or Sfgeoem020 Attribute_Definition: Internal feature number. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2 Range_Domain_Maximum: 20702 Attribute: Attribute_Label: Sfgeoem020-id (Included in Export format file only) Attribute_Definition: User-assigned feature number. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 9 Range_Domain_Maximum: 15192 Attribute: Attribute_Label: Geounit Attribute_Definition: The symbol for the map unit. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (See table below) Enumerated_Domain_Value_Definition: The values for Geounit are listed below along with the associated map unit description, which has two components. Origin_age indicates the origin and age of the map unit type (The significance of the time divisions (e.g., Holocene, Pleistocene, Wisconsin, Illinoian, pre-Illinoian) is indicated in the accompanying pamphlet, i-2789_p.pdf.) Origin_comp indicates the origin and composition of the individual map unit. Geounit symbols in parentheses indicate map units that include deposits or materials of two or more genetic categories. The geounits are listed in the table based on the type of deposit (surficial, residual, other, and water). Surficial deposits are further categorized based on the process of origin or environment of deposition (for example, glacial deposits or windblown deposits). > > Origin and age Geounit Origin and composition >------------------------------------------------------------------- > > SURFICIAL DEPOSITS > > GLACIAL DEPOSITS (TILL) > > Till of late Wisconsin and Holocene(?) age >tc Clayey till--Ground-moraine deposits >td Clayey till--End-moraine deposits >tl Loamy till--Ground-moraine deposits >tm Loamy till--End-moraine deposits >tn Loamy till--Stagnation-moraine deposits >to Loamy till--Flood-scoured till >ts Sandy till--Ground-moraine deposits >tt Sandy till--End-moraine deposits >tx Clayey to sandy till >(tq) Collapsed till and glacial-lake deposits > > Complex deposits of late Wisconsin and Illinoian age >(tg) Till, ice-contact deposits, glaciofluvial deposits, and > glaciolacustrine deposits > > Till of Illinoian age >ta Clayey to loamy till >tk Loamy till--Ground-moraine deposits >tj Loamy till--End-moraine deposits > > Till of Illinoian and pre-Illinoian age >tf Loamy till > > Till of pre-Illinoian age >tp Clayey to loamy till >th Clayey to sandy till >tb Loamy till >(tr) Discontinuous till, discontinuous glaciofluvial > deposits, and concentrations of erratic boulders and > cobbles > > GLACIOTECTONIC DEPOSITS > >fa Surficial deposits, surficial materials, and bedrock > masses that were deformed and (or) transported intact > by glacial ice > > LACUSTRINE (LAKE) DEPOSITS > > Beach deposits of Holocene age >(lk) Beach sand and dune sand (in beaches, spits, and > barriers) > > Glacial and postglacial lake deposits of Holocene and late > Wisconsin age >lc Clay and silt >lf Silt and sand >ls Sand and gravel >lu Clay, silt, sand, and gravel >lh Density-current underflow-fan deposits >ld Delta deposits > > Slack-water lake deposits and alluvium of late Wisconsin > age >(lo) Slack-water lake deposits and alluvium > > Lake deposits of Illinoian age >la Glacial-lake clay and silt >(ln) Slack-water lake deposits and alluvium > > Lake deposits of pre-Illinoian age >lb Glacial-lake clay and silt >(lp) Slack-water lake deposits and alluvium > > Other lake deposits of Holocene and late and middle > Wisconsin(?) age >lm Marl > > Other lake deposits of late Pleistocene age >lg Pluvial clay, silt, sand, and dolomite > > PALUDAL (MARSH AND SWAMP) DEPOSITS > > Inland deposits of Holocene and late Wisconsin age >hp Peat and muck >hs Fresh-water swamp deposits > > Coastal deposits of Holocene age >hb Fresh-water coastal-marsh peat and clay >(hd) Swamp deposits and dune sand >ha Mangrove-swamp deposits >he Algal-mat and carbonate deposits > > Coastal deposits of Holocene and late Wisconsin age >hc Fresh-water, brackish-water, and (or) saline-marsh > deposits > > MARINE DEPOSITS > > Glaciomarine deposits of late Wisconsin age >mc Clay and silt >me Sand and gravel >md Delta deposits >(mt) Glaciomarine deposits and till > > Beach deposits of Holocene age (in beaches, spits, > tombolos, hooks, and barriers) >bb Quartz beach sand >ba Beach shell-fragment and shell >bm Beach mud >(bd) Beach sand and dune sand > > Beach deposits of Holocene and late Pleistocene age >(bc) Beach sand, dune sand, and delta deposits > > Coastal-plain marine deposits of Holocene age >mk Back-island-slope, wash-over-channel, lagoon, and > wind-tidal-flat deposits >(db) Delta deposits > > Coastal-plain marine deposits of late and middle > Pleistocene age >mo Oolitic limestone >ml Coralline limestone > > Coastal-plain marine deposits of Pleistocene age >(mm) Lagoon and beach deposits > > Coastal-plain marine deposits of Pleistocene and Pliocene > age >mb Beach and near-shore deposits >ma Back-barrier and lagoon deposits >ms Sand >(da) Delta deposits > > Coastal-plain marine deposits of early Pleistocene and > Pliocene age >(mh) Marine sand and alluvial sand > > EOLIAN (WINDBLOWN) DEPOSITS > > Silt and clay of Holocene age >ee "Clay dune" deposits > > Silt (loess) of Holocene and late Wisconsin age >el Loess > > Silt (loess) of Holocene and late and middle Pleistocene > age >eb Loess > > Silt (loess) of late and middle Pleistocene age >(ea) Loess, loessal alluvium, and loessal colluvium > > Sand and silt of Holocene and late Wisconsin age > eu Sand and silt > > Sand of Holocene and late Pleistocene age >ed Dune sand >es Sheet sand > > Sand of Holocene and Pleistocene age >(ec) Sheet sand, loess, loessal alluvium, and loessal > colluvium > > ALLUVIAL DEPOSITS (ALLUVIUM) > > Ice-contact deposits of late Wisconsin and Holocene(?) age >ks Ice-contact silt and sand >kg Ice-contact sand and gravel >ke Kame end-moraine or kame interlobate-moraine deposits >(kf) Subaerial and submarine kame-fan deposits >(kd) Glaciolacustrine kame-delta deposits >(km) Marine kame-delta deposits >(kt) Ice-contact deposits and till >(kl) Ice-contact deposits and glacial-lake deposits > > Ice-contact deposits of Illinoian age >ka Ice-contact sand and gravel > > Glaciofluvial (outwash) deposits of late Wisconsin and > Holocene(?) age >gs Outwash sand >gg Outwash sand and gravel >(gt) Outwash deposits and till >(gl) Outwash deposits and ice-contact deposits >(gk) Outwash deposits, ice-contact deposits, and glacial- > lake deposits > > Glaciofluvial (outwash) deposits of Illinoian age >ga Outwash silt, sand, and gravel >(gd) Outwash silt, outwash sand, and alluvium > > Glaciofluvial (outwash) deposits of pre-Illinoian age >gb Outwash sand and gravel >(gc) Outwash sand and gravel and till > > Catastrophic glacial outburst-flood deposits of late > Wisconsin age >ah Flood deposits >(ak) Flood deposits and flood-scoured till > > Alluvial, outwash, ice-contact, and glacial-lake deposits > of Holocene and late Wisconsin age >(ag) Alluvial, outwash, ice-contact, and glacial-lake > deposits > > Alluvial, outwash, ice-contact, and glacial-lake deposits > of middle Pleistocene age >(ab) Alluvial, outwash, ice-contact, and glacial-lake > deposits > > Channel and flood-plain alluvium of Holocene and late > Wisconsin age >al Channel and flood-plain alluvium > > Channel and flood-plain alluvium of Holocene and late and > middle Pleistocene age >(ai) Alluvial deposits, lake deposits, and eolian deposits > > Channel and flood-plain alluvium of Holocene and > Pleistocene age >an Channel and flood-plain alluvium > > Channel and flood-plain alluvium of Holocene, Pleistocene, > and Pliocene age >(ae) Alluvial deposits and estuarine marine deposits >(ao) Cemented channel and flood-plain alluvium, fan > alluvium, sheetwash alluvium, and pediment(?) > alluvium > > Channel and flood-plain alluvium of late and middle > Pleistocene age >ap Alluvial delta deposits > > Channel and flood-plain alluvium of Pleistocene age >at Alluvium beneath terraces, in paleovalleys, and on > upland surfaces > > Channel and flood-plain alluvium of middle and early > Pleistocene and Pliocene age >ac Arkosic alluvium > > Channel and flood-plain alluvium of early Pleistocene and > Pliocene age >aa Cemented alluvium >(aj) Alluvial deposits and lake deposits > > Fan alluvium of Holocene and late and middle Pleistocene > age >(af) Alluvial-fan and sheetwash-fan deposits > > Sheetwash alluvium of Holocene and late Wisconsin age >wb Sheetwash alluvium >wa Sheetwash alluvium in badland terrain >(wc) Sheetwash alluvium and lake deposits > > MASS-MOVEMENT DEPOSITS > > Landslide deposits of Holocene age >ja Slump-block, earthflow, and mudflow deposits > > Landslide deposits of Holocene and late Wisconsin age >(jc) Landslide deposits, bouldery colluvium, and sheetwash > alluvium >(jb) Landslide deposits, disintegration residuum, and > sheetwash alluvium > > Solifluction deposits of Holocene and late and middle > Pleistocene age >(na) Loamy solifluction deposits, colluvium, and > decomposition residuum > > Solifluction deposits of late Wisconsin age >(nb) Loamy solifluction deposits > > Colluvium of Holocene and late Wisconsin age >(cp) Colluvium, sheetwash alluvium, and landslide deposits > > Colluvium of Holocene and late Pleistocene age >cj Clayey chert-clast colluvium >cg Gravelly colluvium > > Colluvium of Holocene and late and middle Pleistocene age >cd Crystalline-boulder colluvium >ce Diabase- and basalt-clast colluvium >cb Resistant-block or resistant-boulder colluvium and rock > waste >cq Sandstone-block or sandstone-boulder colluvium >cc Carbonate-boulder or carbonate-clast colluvium >cl Clastic-clast colluvium >(cv) Locally gypsiferous, clastic-clast colluvium and > solution residuum >cf Acid shale-chip colluvium >cs Calcareous shale-chip and siltstone-clast colluvium >co Shale-clast, chalk-clast, and chalky limestone-clast > colluvium >ci Calcrete-clast colluvium >ck Chert-clast colluvium >ch Sandy to clayey colluvium >cu Colluvium complex >(cx) Colluvium and loess >(cr) Colluvium and solution residuum >(cm) Colluvium, decomposition residuum, and solution > residuum > > Colluvium of Quaternary age >(ca) Colluvium and sheetwash alluvium >(cz) Colluvium, decomposition residuum, and solution > residuum > > Colluvium of Quaternary and Tertiary age >(cw) Colluvium and decomposition residuum > > Colluvium of Pleistocene age >(ct) Colluvium and alluvium > > RESIDUAL MATERIALS > > Grus of Quaternary and Tertiary age >ua Glaciated granitic grus >ub Feldspathic sandy grus > > Disintegration residuum of Holocene and late Wisconsin age >(xm) Smectitic disintegration residuum and sheetwash > alluvium on bentonitic shale, micaceous shale, and > soft clayey shale >(xh) Silty clay loam disintegration residuum and sheetwash > alluvium >(xi) Loamy disintegration residuum and sheetwash alluvium on > clayey shale >(xk) Loamy disintegration residuum, sheetwash alluvium, > and colluvium on sandstone, siltstone, and shale >(xl) Loamy disintegration residuum, sheetwash alluvium, and > colluvium on sandstone, siltstone, mudstone, > claystone, shale, and lignite >(xj) Sandy disintegration residuum, sheetwash alluvium, and > colluvium on soft sandstone, siltstone, and shale > > Disintegration residuum of Holocene and late and middle > Pleistocene age >xg Cemented, gravelly disintegration residuum >xc Quartz sand disintegration residuum >xa Disintegration residuum on clastic rocks >xb Disintegration residuum on clastic rocks and carbonate > rocks >xd Stony, gypsiferous disintegration residuum >(xe) Silty clay disintegration residuum and gypsiferous > solution residuum > > Decomposition residuum of Holocene and late and Middle > Pleistocene age >(zx) Decomposition residuum and colluvium on igneous and > metamorphic rocks > > Decomposition residuum of Quaternary and Tertiary age on > sand and gravel >zb Decomposition residuum on sand and gravel beneath high > stream terraces and in alluvial fans >zk Decomposition residuum on upland sand and gravel and on > paleochannel fill deposits >zn Chert-pebble decomposition residuum on channel gravel > and sand >zg Crumbly quartz-clast decomposition residuum on sand and > gravel >zc Decomposition residuum on sand or mixed-composition > sand and gravel on upland surfaces >zl Quartz-pebble, chert-pebble, and quartzite-pebble > decomposition residuum on sand and gravel on upland > surfaces > > Decomposition residuum of Quaternary age on sedimentary > rocks that contain swelling-clay minerals or that weather > to form swelling-clay minerals >ze Smectitic-clay decomposition residuum >zp Sand, silt, and smectitic-clay decomposition residuum >zu Gravel, sand, silt, and smectitic-clay decomposition > residuum >zj Decomposition residuum complex >zv Decomposition residuum complex > > Decomposition residuum of Quaternary and Tertiary age on > other sedimentary rocks >za Clayey to sandy decomposition residuum >zf Ferruginous sand and clay decomposition residuum >(zd) Decomposition residuum and colluvium on shale, > siltstone, and sandstone >zs Decomposition residuum on sandstone, siltstone, shale, > limestone, and dolomite >(zt) Decomposition residuum and colluvium on arkose, > sandstone, argillite, shale, and conglomerate >(zo) Clayey to sandy decomposition residuum and solution > residuum >(zh) Cherty decomposition residuum, solution residuum, and > colluvium on limestone, shale, and sandstone >(zi) Clayey to sandy decomposition residuum and solution > residuum on sandstone, quartzite, shale, dolomite, > and cherty limestone >(zr) Clayey to sandy decomposition residuum and solution > residuum on clay, shale, coal, sandstone, and > limestone >(zm) Loamy decomposition residuum and colluvium on > sedimentary rocks of mixed compositions > > Solution residuum of Quaternary and Tertiary age >rc Chert-poor or chert-free, clayey to sandy solution > residuum >ra Cherty, clayey to sandy solution residuum >rb Solution residuum complex >rd Cherty, quartz-sand solution residuum >re Sandy solution residuum >(rg) Plastic-clay solution residuum and cherty colluvium >(rh) Solution residuum and decomposition residuum > > Saprolite of Quaternary and Tertiary age >sg Clayey to sandy saprolitized sand and gravel > > Saprolite of Quaternary and Tertiary age on crystalline > igneous and metamorphic rocks >sa Clayey to sandy saprolite on granite, gneiss, schist, > and other felsic, mafic, and ultramafic igneous and > metamorphic rocks >sb Micaceous saprolite on felsic micaceous schist or rocks > of mixed composition >se Clayey saprolite on diabase and basalt >sf Clayey saprolite on nephelene syenite >sc Clayey to sandy saprolite on phyllite, argillite, > slate, marble, greenstone, serpentinite, metabasalt, > metarhyolite, and other felsic metavolcanic rocks > > Saprolite of Quaternary and Tertiary age on quartzose > sedimentary and metasedimentary rocks >sd Quartz-rich saprolite > > OTHER MATERIALS > > Baked and fused bedrock (clinker) of Quaternary age >(qq) Clinker and colluvium > > MAN-MADE LAND > >f Man-made land > > WATER > >water Open water > Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Origin_age Attribute_Definition: A description of the age of the map unit. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (See table above under Geounit) Enumerated_Domain_Value_Definition: The origin and age of the map unit type (The significance of the time divisions (e.g., Holocene, Pleistocene, Wisconsin, Illinoian, pre-Illinoian) is indicated in the accompanying pamphlet, i-2789_p.pdf.) Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Origin_com Attribute_Definition: A description of the composition of the map unit. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: (See table above under Geounit) Enumerated_Domain_Value_Definition: The origin and composition of the map unit type. Detailed definitions for each map unit are included in the accompanying pamphlet, i-2789_p.pdf) Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Color Attribute_Definition: The shade pattern number from the Arc/INFO shadeset, color524.shd. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 524 Attribute: Attribute_Label: R Attribute_Definition: Value of red used to produce map unit colors. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Attribute: Attribute_Label: G Attribute_Definition: Value of green used to produce map unit colors. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Attribute: Attribute_Label: B Attribute_Definition: Value of blue used to produce map unit colors. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Detailed_Description: Entity_Type: Entity_Type_Label: Rock or geologic deposit boundary line (described by sfgeoem020.aat or sfgeoel020.dbf) Entity_Type_Definition: The line separating different geologic map units. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Shape Attribute_Definition: The representation of the entity in the data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Polyline Enumerated_Domain_Value_Definition: 1-dimensional element that may or may not surround a 2-dimensional element. Enumerated_Domain_Value_Definition_Source: ESRI GIS software Attribute: Attribute_Label: Fnode_ Attribute_Definition: Internal sequence number of the from-node. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 50616 Attribute: Attribute_Label: Tnode_ Attribute_Definition: Internal sequence number of the to-node. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 50616 Attribute: Attribute_Label: Lpoly_ Attribute_Definition: Internal sequence number of the left polygon. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 20702 Attribute: Attribute_Label: Rpoly_ Attribute_Definition: Internal sequence number of the right polygon. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 20702 Attribute: Attribute_Label: Length Attribute_Definition: The length of the line in coverage units. In the distributed file, coverage units represent decimal degrees. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00000 Range_Domain_Maximum: 4.14722 Attribute: Attribute_Label: sfgeoem020# or sfgeoem020 Attribute_Definition: Internal feature number. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 64097 Attribute: Attribute_Label: sfgeoem020-id (Included in Export format file only) Attribute_Definition: User-assigned feature number. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 500688 Attribute: Attribute_Label: Ltype Attribute_Definition: The type of geologic map unit boundary. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Border Enumerated_Domain_Value_Definition: A boundary where the map unit is terminated at the international border with Canada. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Closure Enumerated_Domain_Value_Definition: A boundary where the map unit is terminated by an arbitrary line defining the western edge of the map. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Contact Enumerated_Domain_Value_Definition: A boundary where two different map units meet. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Riverbank Enumerated_Domain_Value_Definition: A boundary where the map unit is terminated by either side of a river. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Shoreline Enumerated_Domain_Value_Definition: A boundary where the map unit is terminated at a body of water other than a river. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Stream Enumerated_Domain_Value_Definition: A boundary where the map unit is terminated by the Rio Grande, which forms the international border with Mexico. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Detailed_Description: Entity_Type: Entity_Type_Label: Detailed glacial limit line, without line decorations (described by Glacall020.aat or Glacall020.dbf) Entity_Type_Definition: A line showing the southern limit of glaciation in the United States at various times. This line should be used for data analysis, rather than the detailed glacial limit line with line decorations. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Shape Attribute_Definition: The representation of the entity in the data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Polyline Enumerated_Domain_Value_Definition: 1-dimensional element that may or may not surround a 2-dimensional element. Enumerated_Domain_Value_Definition_Source: ESRI GIS software Attribute: Attribute_Label: Fnode_ Attribute_Definition: Internal sequence number of the from-node. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 124 Attribute: Attribute_Label: Tnode_ Attribute_Definition: Internal sequence number of the to-node. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 124 Attribute: Attribute_Label: Lpoly_ Attribute_Definition: Internal sequence number of the left polygon. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -1 Range_Domain_Maximum: 0 Attribute: Attribute_Label: Rpoly_ Attribute_Definition: Internal sequence number of the right polygon. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -1 Range_Domain_Maximum: 0 Attribute: Attribute_Label: Length Attribute_Definition: The length of the line in coverage units. In the distributed file, coverage units represent decimal degrees. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.20463 Range_Domain_Maximum: 587265.87598 Attribute: Attribute_Label: Glacall020# or Glacall020 Attribute_Definition: Internal feature number. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 91 Attribute: Attribute_Label: Glacall020-id (Included in Export format file only) Attribute_Definition: User-assigned feature number. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 26244 Range_Domain_Maximum: 265012 Attribute: Attribute_Label: Ltype Attribute_Definition: An indication of the geologic time period associated with each position of maximum glacial advance. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ill Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian time, 310,000- 128,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: ill inf Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian time, 310,000- 128,000 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: ill or preill Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian or pre-Illinoian time, earlier than 128,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: late wisc Enumerated_Domain_Value_Definition: The southern limit of glaciation during Late Wisconsin time, 35,000- 11,150 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: late wisc inf Enumerated_Domain_Value_Definition: The southern limit of glaciation during Late Wisconsin time, 35,000- 11,150 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: preill Enumerated_Domain_Value_Definition: The southern limit of glaciation prior to Illinoian time, earlier than 310,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: preill inf Enumerated_Domain_Value_Definition: The southern limit of glaciation prior to Illinoian time, earlier than 310,000 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Text Attribute_Definition: A textual explanation of Ltype. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Illinoian glacial limit Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian time, 310,000- 128,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Illinoian glacial limit, inferred Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian time, 310,000- 128,000 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Illinoian or pre-Illinoian glacial limit Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian or pre-Illinoian time, earlier than 128,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Late Wisconsin glacial limit Enumerated_Domain_Value_Definition: The southern limit of glaciation during Late Wisconsin time, 35,000- 11,150 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Late Wisconsin glacial limit, inferred Enumerated_Domain_Value_Definition: The southern limit of glaciation during Late Wisconsin time, 35,000- 11,150 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Pre-Illinoian glacial limit Enumerated_Domain_Value_Definition: The southern limit of glaciation prior to Illinoian time, earlier than 310,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Pre-Illinoian glacial limit, inferred Enumerated_Domain_Value_Definition: The southern limit of glaciation prior to Illinoian time, earlier than 310,000 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Detailed_Description: Entity_Type: Entity_Type_Label: Detailed glacial limit line, with line decorations (described by Glacagl020.aat or Glacagl020.dbf) Entity_Type_Definition: A line showing the southern limit of glaciation in the United States at various times. This line is a graphic representations of the symbolized line used on the geologic map. This line should be used to produce appropriately symbolized graphics. The decorations only appear correctly in Lambert Azimuthal Equal Area projection. Entity_Type_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Shape Attribute_Definition: The representation of the entity in the data. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Polyline Enumerated_Domain_Value_Definition: 1-dimensional element that may or may not surround a 2-dimensional element. Enumerated_Domain_Value_Definition_Source: ESRI GIS software Attribute: Attribute_Label: Fnode_ Attribute_Definition: Internal sequence number of the from-node. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3 Range_Domain_Maximum: 1666 Attribute: Attribute_Label: Tnode_ Attribute_Definition: Internal sequence number of the to-node. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4 Range_Domain_Maximum: 1667 Attribute: Attribute_Label: Lpoly_ Attribute_Definition: Internal sequence number of the left polygon. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0 Attribute: Attribute_Label: Rpoly_ Attribute_Definition: Internal sequence number of the right polygon. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 0 Attribute: Attribute_Label: Length Attribute_Definition: The length of the line in coverage units. In the distributed file, coverage units represent decimal degrees. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00001 Range_Domain_Maximum: 6.48551 Attribute: Attribute_Label: Glacagl020# or Glacagl020 Attribute_Definition: Internal feature number. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 771 Attribute: Attribute_Label: Glacagl020-id (Included in Export format file only) Attribute_Definition: User-assigned feature number. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 26244 Range_Domain_Maximum: 265584 Attribute: Attribute_Label: Ltype Attribute_Definition: An indication of the geologic time period associated with each position of maximum glacial advance. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ill Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian time, 310,000- 128,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: ill inf Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian time, 310,000- 128,000 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: ill or preill Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian or pre-Illinoian time, earlier than 128,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: late wisc Enumerated_Domain_Value_Definition: The southern limit of glaciation during Late Wisconsin time, 35,000- 11,150 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: late wisc inf Enumerated_Domain_Value_Definition: The southern limit of glaciation during Late Wisconsin time, 35,000- 11,150 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: preill Enumerated_Domain_Value_Definition: The southern limit of glaciation prior to Illinoian time, earlier than 310,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: preill inf Enumerated_Domain_Value_Definition: The southern limit of glaciation prior to Illinoian time, earlier than 310,000 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Text Attribute_Definition: A textual explanation of Ltype. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Illinoian glacial limit Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian time, 310,000- 128,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Illinoian glacial limit, inferred Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian time, 310,000- 128,000 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Illinoian or pre-Illinoian glacial limit Enumerated_Domain_Value_Definition: The southern limit of glaciation during Illinoian or pre-Illinoian time, earlier than 128,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Late Wisconsin glacial limit Enumerated_Domain_Value_Definition: The southern limit of glaciation during Late Wisconsin time, 35,000- 11,150 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Late Wisconsin glacial limit, inferred Enumerated_Domain_Value_Definition: The southern limit of glaciation during Late Wisconsin time, 35,000- 11,150 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Pre-Illinoian glacial limit Enumerated_Domain_Value_Definition: The southern limit of glaciation prior to Illinoian time, earlier than 310,000 years ago. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: Pre-Illinoian glacial limit, inferred Enumerated_Domain_Value_Definition: The southern limit of glaciation prior to Illinoian time, earlier than 310,000 years ago, inferred. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Color Attribute_Definition: The color used for display. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: blk Enumerated_Domain_Value_Definition: The line is shown in black. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Enumerated_Domain: Enumerated_Domain_Value: red Enumerated_Domain_Value_Definition: The line is shown in red. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing Address: MS 902, Box 25046, Denver Federal Center City: Lakewood State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-4845 Contact_Electronic_Mail_Address: troudebush@usgs.gov Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the U.S. Geological Survey in the use of these data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE File_Decompression_Technique: gzipped tar file Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI Shapefile Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: There is no charge for download of these files. Metadata_Reference_Information: Metadata_Date: 20040218 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Charles A. Bush Contact_Address: Address_Type: Mailing and physical address Address: MS 913, Box 25046, Room 1512, Building 25, Denver Federal Center City: Lakewood 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: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None