Identification_Information: 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: 2009 Title: Quaternary Geologic Map of the Mobile 4° x 6° Quadrangle, United States Edition: 1.1 Geospatial_Data_Presentation_Form: (map) Series_Information: Series_Name: Miscellaneous Investigations series Issue_Identification: I-1420 (NH-16) Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1988 Title: Quaternary geologic atlas of the United States Geospatial_Data_Presentation_Form: (map) Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: I-1420 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Description: Abstract: The Quaternary Geologic Map of the Mobile 4° x 6° Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other materials that accumulated or formed during the past 2+ million years, the period that includes all activities of the human species. These materials are at the surface of the Earth. They make up the ground on which we walk, the dirt in which we dig foundations, and the soil in which we grow crops. Most of our human activity is related in one way or another to these surface materials that are referred to collectively by many geologists as regolith, the mantle of fragmental and generally unconsolidated material that overlies the bedrock foundation of the continent. The maps were compiled at 1:1,000,000 scale. Purpose: In recent years, surficial deposits and materials have become the focus of much interest by scientists, environmentalists, governmental agencies, and the general public. They are the foundations of ecosystems, the materials that support plant growth and animal habitat, and the materials through which travels much of the water required for our agriculture, our industry, and our general well being. They also are materials that easily can become contaminated by pesticides, fertilizers, and toxic wastes. In this context, the value of the surficial geologic map is evident. NOTE: This map is the product of collaboration of State geological surveys, universities, and the U.S. Geological Survey, and is designed for both scientific and practical purposes. It was prepared in two stages. First, separate maps and map explanations of the parts of States included in the quadrangle were prepared by the State compilers indicated on the inset diagram, Areas of Responsibility. Second, these maps were combined, integrated, locally supplemented, and related to a uniform map symbol classification. The map unit descriptions also were combined, supplemented, and coordinated with those of other maps of this series so that individual unit descriptions are applicable throughout both this map and all other maps of the series. Diagrams accompanying the map were prepared by the editors. Differences in mapping or interpretation in different areas were resolved by correspondence to the extent possible. Most simply reflect differences in available information or differences in philosophies of mapping. Such differences serve to encourage further investigation. Less than forty percent of the surficial deposits of the United States have been mapped and described. Traditionally, mapping of surficial deposits has been focused on glacial, alluvial, eolian, lacustrine, and marine deposits. Slope and upland deposits have been mapped in detail only in restricted areas. However, an enormous amount of engineering construction and many important problems of land use and land management are associated with regions that have extensive slope and upland deposits (colluvium, and residuum for example). These materials have many different physical characteristics. Therefore, an effort has been made to classify, map, and describe these deposits, based in large part on unpublished interpretations of individuals, published and unpublished subsoil data, and the distribution of bedrock parent materials. The classification is crude, but represents a first step toward a more refined and useful product. For scientific purposes, the map differentiates Quaternary surficial deposits on the basis of a combination of criteria, such as lithology, texture, genesis, stratigraphic relationships, and age, as shown on the correlation diagram and indicated in the map unit descriptions. Some geomorphic features, such as dune ridge, are distinguished as map units. Erosional features, such as stream terraces, are not distinguished, and differentiation of sequences of alluvial deposits of different ages is rarely possible at a scale of 1:1,000,000. For practical purposes, the map is a surficial materials map, on which materials are distinguished on the basis of texture, composition, and local specific characteristics such as swelling clay. It is not a map of soils as soils are recognized and classified in pedology or agronomy. Rather it is a generalized map of soils as recognized in engineering geology, or of subsoils or parent materials from which pedologic and agronomic soils are formed. As a materials map it serves as a base from which a wide variety of derivative maps for use in planning engineering, land use, or land management projects can be compiled. Supplemental_Information: This database represents an attempt to digitally capture all the geologic information available on the published paper map. Separate coverages are provided for the map unit polygons, linear features, and line coverages for the hydrology and topography. The description of map units and sources of information are both included as a PDF file. The published maps of the Quaternary Geologic Atlas of the United States used three separate projections. To promote uniformity, the projection of this database was changed from Lambert Conformal Conic to Albers Equal Area and all subsequent digital databases will similarly be changed to Albers Equal Area Projection. Illustrations are provided showing an index to the International Map of the World 1:1,000,000; areas of responsibility for the compilation of the map; distribution and thickness of loess in the map area; location and age of ancestral deltas of the Mississippi River; and showing the correlation of map units. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file includes some ArcInfo-specific terminology. >The dataset for the Mobile quadrangle consists of 9 coverages. > geo_net > geo_lin > hydr_lin > topo_lin > bnd_lin > bnd_poly > rd_lin > rr_lin > grid_lin > The dataset also includes an ArcInfo AML and shadeset that will produce the Illustrator or ArcInfo PDF file of the geology and list of map units. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1980 Ending_Date: 1981 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None Planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -90.00 East_Bounding_Coordinate: -84.00 North_Bounding_Coordinate: 32.00 South_Bounding_Coordinate: 28.00 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute (AGI) Glossary of Geology Theme_Keyword: Alluvium Theme_Keyword: Beach deposits Theme_Keyword: Coastal deposits Theme_Keyword: Colluvium Theme_Keyword: Delta Theme_Keyword: Dune Theme_Keyword: Eolian 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: Lacustrine deposits Theme_Keyword: Outwash deposits Theme_Keyword: Quaternary geology Theme_Keyword: Regional geology Theme_Keyword: Sand deposits Theme_Keyword: Saprolite Theme_Keyword: Sedimentary rocks Theme_Keyword: Surficial deposits Theme_Keyword: Surficial geology Theme_Keyword: Swamp deposits Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: Florida Place_Keyword: Georgia Place_Keyword: Louisiana Place_Keyword: Mississippi Place_Keyword: Mobile Place_Keyword: United States Temporal: Temporal_Keyword_Thesaurus: Richmond, G.M., and Fullerton, D.S., eds., 1986, Introduction, in Quaternary glaciations in the United States of America: Quaternary Science Reviews, v. 5. Temporal_Keyword: Cenozoic Temporal_Keyword: Early Pleistocene Temporal_Keyword: Early Wisconsin Temporal_Keyword: Holocene Temporal_Keyword: Late Pleistocene Temporal_Keyword: Pleistocene Temporal_Keyword: Pliocene Temporal_Keyword: Late Wisconsin Temporal_Keyword: Middle Pleistocene Temporal_Keyword: Quaternary Temporal_Keyword: Tertiary Access_Constraints: None Use_Constraints: Acknowledgment of the Quaternary Geologic Atlas of the United States of America and (or) the U.S. Geological Survey in products derived from these data will be appreciated. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Charles A. Bush Contact_Organization: U.S. Geological Survey Contact_Position: Scientist Emeritus Contact_Address: Address_Type: Mailing and physical address Address: Mail Stop 980, Box 25046, Federal Center City: Lakewood State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-4723 Contact_Facsimile_Telephone: (303) 236-0214 Contact_Electronic_Mail_Address: cbush@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: I-1420_nh-16_map.pdf> Browse_Graphic_File_Description: Scan of the original published paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nh-16_plotfile.pdf> Browse_Graphic_File_Description: Plot of the digital files containing map units, hydrology, topography, and list of map symbols. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nh-16_correlation.pdf> Browse_Graphic_File_Description: Scan of correlation diagram on published paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nh-16_index.pdf> Browse_Graphic_File_Description: Index map showing location of Quaternary Geologic Atlas of the U.S. quadrangles and quadrangles published digitally and as paper maps. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nh-16_responsibility.pdf> Browse_Graphic_File_Description: Scan of illustration of State compilation responsibilities shown on the paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nh-16_loess.pdf> Browse_Graphic_File_Description: Scan of illustration of loess distribution and thickness. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nh-16_deltas.pdf> Browse_Graphic_File_Description: Scan of illustration of ancestral and present deltas of the Mississippi River, Louisiana. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nh-16_textonly.pdf> Browse_Graphic_File_Description: Text description of map units, figure captions, notes on the original map, and sources of information used in preparing the original map. Browse_Graphic_File_Type: PDF Data_Set_Credit: The Quaternary Geologic Map of the Mobile 4° x 6° Quadrangle, United States, I-1420 (NH-16) was compiled by: Charles W. Copeland, Jr., Katherine F. Rheams, Thornton L. Neathery, Alabama Geological Survey; William A. Gilliland, Mississippi Geological Survey; Walter Schmidt, Florida Bureau of Geology; William C. Clark, Jr., Georgia Geologic Survey; and David E. Pope, Louisiana Geological Survey. The map was edited and integrated by Gerald M. Richmond, David S. Fullerton, and David L. Weide, U.S. Geological Survey. The compilation of geology, hydrology, and topography was converted to digital form by TechniGraphic Systems, Inc., of Fort Collins, CO, under contract with the U.S. Geological Survey and modified by Charles A. Bush. Native_Data_Set_Environment: Windows_XP, 4.0, Intel ArcInfo version 9.2 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Compilation of geologic data: The accuracy of the map data is dependent on (1) the accuracy of the original source data, (2) the accuracy of transfer of that data to larger scale bases by the compilers, (3) the procedures by which the compilers and the editor/integrator simplified or generalized the data, and (4) the procedures used by, and the objectivity exercised by, the editor/integrator in integration of adjacent parts of the map that were prepared by different compilers. Consequently, aspects of accuracy for the data set cannot be quantified. Digitization and attributing of compilation: Digitizing contractor scanned source stable-base contact lines and water boundaries, vectorized scan, attributed files, and produced check plots and coverages of map units. The contractor also scanned and converted hydrography and topography from the stable-base mylar. C.A. Bush rectified differences between the geology and the hydrology, proofread check plots, added additional attribution, and reviewed digital files; made final corrections as needed; produced graphical files and imported them into graphics program to prepare plot file; proofread cartographic product; prepared illustrations and word-processing files of descriptions of map units and sources of information. The original paper map was scanned and recreated as PDF files. (The original map was thoroughly reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature.) Logical_Consistency_Report: Polygon and chain-node topology are present. The ArcInfo commands BUILD and CLEAN were run to ensure the topological consistency of the data set. All polygons are labeled and were tested by using the ArcInfo command LABELERRORS. All polygons were checked for closure and intersections. Completeness_Report: These coverages contain polygons for all the map units, and lines for all the contacts and shorelines. All geologic data from the original map are expressed on this map. Any differences between elements on the original map and attributed polygons or arcs in this database are inadvertent and should not be construed as deliberate alterations of the data. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The accuracy of location of polygons, lines, and points is consistent with the map scale of 1:1,000,000. The digital file was prepared at 1:1,000,000 nominal viewing scale. If the map is enlarged to larger scales (for example, 1:250,000, 1:100,000, or 1:24,000 scale), resolution of the map data is greatly diminished. Enlargement will not restore resolution that was lost by simplification or generalization of data. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Gerald M. Richmond (ed.) Originator: 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: I-1420 (NH-16) Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: mylar source map layers and published paper map Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1982 Ending_Date: 1983 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: Copeland, Rheams, and others, 1988 Source_Contribution: Linework for the data sets Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 200206 Title: State Boundaries of the United States Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Source_Scale_Denominator: 2000000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1972 Ending_Date: 2002 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: Statesp020 Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 200411 Title: County Boundaries of the United States, 2001 Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: National Atlas of the United States Source_Scale_Denominator: 2000000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1972 Ending_Date: 2001 Source_Currentness_Reference: Ground condition Source_Citation_Abbreviation: Countyp020 Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 199911 Title: Major Roads of the United States Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Source_Scale_Denominator: 2000000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1972 Ending_Date: 1999 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Roadtrl020 Source_Contribution: spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 199812 Title: Railroads of the United States Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Source_Scale_Denominator: 2000000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 199812 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Railrdl020 Source_Contribution: spatial information Process_Step: Process_Description: Digitizing contractor scanned source stable-base contacts for geology and water bodies, hydrology, and topography; merged scans; vectorized scans; converted scans into ArcInfo coverages and attributed files and produced check plots and coverages. Process_Date: 2002 Process_Step: Process_Description: C.A. Bush resolved water boundaries using the hydrology scan. Coverage of geology was checked and corrected or changed. Additional items were included in the attributes. AML's were created to plot the data. Plots were imported into graphics program to create a plotfile of the digital map. Process_Date: 2009 Process_Step: Process_Description: Bush acquired National Atlas of the United States 1:2,000,000 digital data for roads, railroads, and county boundaries in the United States. Data was clipped to cover only the area of the map. Since the files are intended only for the user's reference, and to reduce file size, all attributes were removed from the railroad coverage. All attributes were removed from the roads coverage except U.S. and State highway designations. A coverage was created containing map boundaries, and State and county boundaries. These coverages do not exactly match the base used in preparation of the original Quaternary Atlas map, but are included for the user's convenience. Process_Date: 2009 Process_Step: Process_Description: C.A. Bush created illustration of the index map on the paper map in a drawing program and changed it to reflect the status of conversion of Quaternary Geologic Atlas quadrangles to digital databases. Bush scanned original printed map and also separated State compilation responsibility, ancestral and present deltas, and map unit correlation diagrams, cleaned the scans, and converted them to PDF format. Process_Date: 2009 Process_Step: Process_Description: Map unit descriptions and sources of information as given on the printed map were scanned and converted by an Optical Character Recognition computer program into text files and to PDF format(Bush). Process_Date: 2009 Process_Step: Process_Description: Illustrations and text files were checked and edited by Bush. Process_Date: 2009 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 29.5 Standard_Parallel: 45.5 Longitude_of_Central_Meridian: -96 Latitude_of_Projection_Origin: 23 False_Easting: 0.00000 False_Northing: 0.00000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 100 Ordinate_Resolution: 100 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The geo_net coverage includes polygons that are map units and open water, and arcs that are contact, shoreline, and map boundaries. The geo_net.pat INFO file consists of the following items: GEOCODE--Refers to the type of polygon and is either the map unit symbol, or Lake, or Water. MAPUNITS--A description of the deposits and materials that make up the map units; blank where not applicable. (See below.) See textonly file for full unit descriptions. AGE--Refers to the age of the map unit and is one of the following: HOLOCENE, HOLOCENE AND LATE WISCONSIN, HOLOCENE TO MIDDLE WISCONSIN, LATE PLEISTOCENE, LATE PLEISTOCENE TO EARLY PLEISTOCENE, EARLY PLEISTOCENE(?) TO MIDDLE PLIOCENE, QUATERNARY AND TERTIARY, or blank where not applicable. (See table below.) MODIFIER--Refers to the names of certain bodies of water. COLOR--An integer value representing a shade pattern in the shadeset color524.shd used in preparing the plotfile of the map. Items in geo_net.pat are defined as follows: >GEOCODE; MAPUNITS; AGE (where applicable) > >asa; ALLUVIAL GRAVELLY SAND; HOLOCENE >asl; ALLUVIAL SAND AND SILT; HOLOCENE >aca; ALLUVIAL CLAY; HOLOCENE >fl; NATURAL LEVEE SILT; HOLOCENE >hs; SWAMP DEPOSIT; HOLOCENE >hpc; FRESHWATER-MARSH PEAT AND CLAY; HOLOCENE >hps; SALINE-MARSH DEPOSIT; HOLOCENE >he; SWAMP DEPOSIT AND DUNE SAND; HOLOCENE >be; BEACH AND DUNE SAND; HOLOCENE >ba; BEACH SAND; HOLOCENE >bb; BEACH SAND AND SHELL SAND; HOLOCENE >bc; BEACH SHELL-FRAGMENT AND SHELL SAND; HOLOCENE >bd; BEACH MUD; HOLOCENE > > >ald; ALLUVIAL DELTA LOAM; HOLOCENE AND LATE WISCONSIN > > >acb; ALLUVIAL CLAY AND SILT; LATE WISCONSIN > > >bda; BEACH AND DUNE SAND, AND DELTA DEPOSIT; HOLOCENE TO MIDDLE WISCONSIN > > >da; DELTA DEPOSIT; LATE PLEISTOCENE > > >aga; ALLUVIAL QUARTZ-PEBBLE GRAVEL AND SAND; LATE PLEISTOCENE TO EARLY PLEISTOCENE > > >agc; ALLUVIAL PEBBLE GRAVEL AND SAND; EARLY PLEISTOCENE(?) TO MIDDLE PLEISTOCENE > > >zsa; LIMONITIC SANDY DECOMPOSITION RESIDUUM; QUATERNARY AND TERTIARY >zsc; SAND AND CLAY DECOMPOSITION RESIDUUM; QUATERNARY AND TERTIARY >zse; CLAYEY FINE TO MEDIUM SAND AND SANDY CLAY DECOMPOSITION RESIDUUM; > QUATERNARY AND TERTIARY >zsf; MEDIUM TO COARSE SAND AND SANDY CLAY DECOMPOSITION RESIDUUM; QUATERNARY > AND TERTIARY >zsg; SANDY CLAY AND FERRUGINOUS COARSE SAND DECOMPOSITION RESIDUUM; QUATERNARY > AND TERTIARY >zsh; SILTY FINE SAND AND SANDY SILT DECOMPOSITION RESIDUUM; QUATERNARY > AND TERTIARY >zsm; CLAYEY SILT AND VERY FINE SAND DECOMPOSITION RESIDUUM; QUATERNARY > AND TERTIARY >zca; SANDY CLAY DECOMPOSITION RESIDUUM; QUATERNARY AND TERTIARY >zcb; SMECTITIC CLAY DECOMPOSITION RESIDUUM; QUATERNARY AND TERTIARY >zcd; SILICEOUS CLAY DECOMPOSITION RESIDUUM; QUATERNARY AND TERTIARY >zce; MASSIVE CLAY DECOMPOSITION RESIDUUM; QUATERNARY AND TERTIARY >rse; CALCAREOUS SANDY CLAY SOLUTION RESIDUUM; QUATERNARY AND TERTIARY >rsf; CLAYEY SAND SOLUTION RESIDUUM WITH CHERT BLOCKS; QUATERNARY AND TERTIARY >rsh; CLAYEY SAND SOLUTION RESIDUUM; QUATERNARY AND TERTIARY >rcg; DARK-GRAY CLAY SOLUTION RESIDUUM; QUATERNARY AND TERTIARY > > >Lake >Water > > The geo_net.aat INFO file consists of the following item: LTYPE--Refers to the type of arc and is one of the following: Contact, Shoreline, Map Boundary or null. Null is an arbitrary line dividing bodies of water. geo_lin is a line coverage indicating linear features. The geo_lin.aat INFO file contains only the item LTYPE that contains the value BEACH RIDGE. hydr_lin is a line coverage created after scanning and vectorizing the hydrographic from the stable-base mylar from the paper map. It has no user-defined attributes. topo_lin is a line coverage created after scanning and vectorizing the the stable-base mylar from the original paper map. It has no user-defined attributes. bnd_lin is a line coverage created from 1:2,000,000-scale State Boundaries of the United States coverage from the National Atlas of the United States. The bnd_lin.aat INFO file consists of the following item: LTYPE--Refers the type type of arc and is one of the following: State Boundary or Map Boundary. It is annotated with state names. bnd_poly is a polygon coverage created from 1:2,000,000-scale County Boundaries of the United States, 2001 coverage from the National Atlas of the United States. All user-defined items were removed except state (ST) and county (CNTYNAME) names. rd_lin is a line coverage created from the 1:2,000,000-scale Major Roads of the United States coverage of the National Atlas of the United States. All user-defined attributes have been stripped from the lines except FEATURE (describing road type), NAME (describing highway numbers), and STATE. rr_lin is a line coverage created from 1:2,000,000-scale Railroads of the United States coverage from the National Atlas of the United States. It has no user-defined attributes. grid_lin is a line coverage created to display projection lines in one degree increments. It has no user-defined attributes. Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Enterprise Publishing Network Contact_Address: Address_Type: Mailing address Address: U.S. Geological Survey, MS902, Box 25046, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: NA Contact_Electronic_Mail_Address: NA Resource_Description: Miscellaneous Investigations Series Map I-1420 (NH-16), Quaternary Geologic Map of the Mobile 4° × 6° Quadrangle, United States Distribution_Liability: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this data set has been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the USGS as to the accuracy and functioning of the data set and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE, SHP Format_Version_Number: 9.2 File_Decompression_Technique: WinZip Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: No cost for the digital files. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing Address: U.S. Geological Survey Information Services, Box 25286, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: Miscellaneous Investigations Series Map I-1420 (NH-16), Quaternary Geologic Map of the Mobile 4° × 6° Quadrangle, United States (printed edition) Distribution_Liability: NONE Standard_Order_Process: Non-digital_Form: Available as one folded sheet, printed on a four-color press; order from USGS at address listed above. Fees: Call 1-888-ASK-USGS or visit http://pubs.er.usgs.gov for current price of printed edition. Metadata_Reference_Information: Metadata_Date: 2009 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Charles A. Bush Contact_Organization: U.S. Geological Survey Contact_Position: Scientist Emeritus Contact_Address: Address_Type: Mailing Address: U.S. Geological Survey, MS980, Box 25046, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-4723 Contact_Facsimile_Telephone: (303) 236-0214 Contact_Electronic_Mail_Address: cbush@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998