Identification_Information: 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: 2006 Title: Quaternary Geologic Map of the Chesapeake Bay 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 (NJ-18) 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: 1987 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 Chesapeake Bay 4° x 6° Quadrangle was mapped as part of the Quaternary Geologic Atlas of the United States. The atlas was begun as an effort to depict the areal distribution of surficial geologic deposits and other materials that accumulated or formed during the past 2+ million years, the period that includes all activities of the human species. These materials are at the surface of the Earth. They make up the "ground" on which we walk, the "dirt" in which we dig foundations, and the "soil" in which we grow crops. Most of our human activity is related in one way or another to these surface materials that are referred to collectively by many geologists as regolith, the mantle of fragmental and generally unconsolidated material that overlies the bedrock foundation of the continent. The maps were compiled at 1:1,000,000 scale. Purpose: In recent years, surficial deposits and materials have become the focus of much interest by scientists, environmentalists, governmental agencies, and the general public. They are the foundations of ecosystems, the materials that support plant growth and animal habitat, and the materials through which travels much of the water required for our agriculture, our industry, and our general well being. They also are materials that easily can become contaminated by pesticides, fertilizers, and toxic wastes. In this context, the value of the surficial geologic map is evident. Supplemental_Information: This map is the product of interorganizational collaboration. Following a regional meeting of the State compilers with the coordinator to establish map units and related matters, separate Quaternary maps and map explanations of the part of each State included in the quadrangle were prepared by the State compilers. These maps and explanations were then assembled, integrated, and supplemented by the editors to produce the quadrangle map and map explanation. Problems related to differentiation and description of saprolite units, and to correlation of Pleistocene formations of the Coastal Plain, were resolved at additional meetings as well as by correspondence. The footnote on saprolite was prepared by E. T. Cleaves, Maryland Geological Survey, and R. B. Daniels, North Carolina State University. The correlation chart of Coastal Plain formations was prepared by G. M. Richmond with the cooperation of G. H. Johnson, College of William and Mary, and R. B. Mixon, U.S. Geological Survey. The other diagrams were prepared by the editors. The compilers reviewed the map prior to its submittal for publication. For scientific purposes, the map differentiates Quaternary surficial deposits on the basis of lithology or composition, texture or particle size, structure, and genesis; stratigraphic relationships, engineering geologic properties, and relative age, as shown on the correlation diagram and indicated in the description of map units. Deposits of some constructional geomorphic features, such as end moraines, are distinguished as map units. Deposits of erosional landforms, such as stream terraces, are not distinguished, although alluvial deposits that are mapped may be terraced. As a Quaternary geologic map, it serves as a base from which a variety of maps relating Quaternary geologic history can be derived. For practical purposes, the map is a surficial materials map. Materials are distinguished on the basis of lithology or composition, texture or particle size, and other physical, chemical, and engineering characteristics. It is not a map of soils recognized and classified in pedology or agronomy. Rather, it is a generalized map of soils as recognized in engineering geology, or of substrata or parent materials in which pedologic and agronomic soils are formed. As a materials map, it serves as a base from which a variety of maps for use in planning engineering, land use, or land management projects can be derived. The digital file was prepared at 1:1,000,000 nominal viewing scale. If the map is enlarged to larger scales (for example, 1:250,000, 1:100,000, or 1:24,000 scale), resolution of the map data is greatly diminished. Enlargement will not restore resolution that was lost by simplification or generalization of data. This database represents an attempt to digitally capture all the geologic information available on the published paper map. Separate coverages are provided for the map unit polygons, linear glacial features, point data for other glacial 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 areas of responsibility for the compilation of the map and showing the correlation of map units. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file includes some ArcInfo-specific terminology. >The dataset for the Chesapeake Bay quadrangle consists of 9 coverages. > geo_net > geo_lin > hydr_lin > topo_lin > bnd_lin > bnd_net > rd_lin > rr_lin > grid_lin > The dataset also includes an ArcInfo AML and shadeset that will produce the Illustrator or ArcInfo meta file of the geology and list of map units. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1979 Ending_Date: 1982 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None Planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -78.00 East_Bounding_Coordinate: -72.00 North_Bounding_Coordinate: 40.00 South_Bounding_Coordinate: 36.00 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: Holocene Theme_Keyword: Ice-contact deposits Theme_Keyword: Lacustrine deposits Theme_Keyword: Outwash deposits Theme_Keyword: Quaternary Theme_Keyword: Quaternary geology Theme_Keyword: Regional geology Theme_Keyword: Sand deposits Theme_Keyword: Sedimentary Rocks Theme_Keyword: Surficial deposits Theme_Keyword: Surficial geology Theme_Keyword: Swamp deposits Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: Chesapeake Bay Place_Keyword: Delaware Place_Keyword: Maryland Place_Keyword: New Jersey Place_Keyword: North Carolina Place_Keyword: Pennsylvania Place_Keyword: Virginia Place_Keyword: West Virginia 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: Holocene Temporal_Keyword: Late Wisconsin Temporal_Keyword: Miocene Temporal_Keyword: Pleistocene Temporal_Keyword: Pliocene Temporal_Keyword: Quaternary Access_Constraints: None Use_Constraints: Acknowledgment of the Quaternary Geologic Atlas of the United States of America and (or) the U.S. Geological Survey in products derived from these data will be appreciated. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Charles A. Bush Contact_Organization: U.S. Geological Survey Contact_Position: Emeritus Geophysicist Contact_Address: Address_Type: Mailing and physical address Address: Mail Stop 980, Box 25046, Federal Center City: Lakewood State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-4723 Contact_Facsimile_Telephone: (303) 236-0214 Contact_Electronic_Mail_Address: cbush@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: I-1420_nj-18_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_nj-18_plotfile.pdf> Browse_Graphic_File_Description: Plot of the digital files containing map units, marine scarps, State boundaries, hydrology, topography, and list of map symbols. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nj-18_correlationdiag.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_nj-18_correlationchart.pdf> Browse_Graphic_File_Description: Scan of chart of correlation of stratigraphic units on published paper map. Browse_Graphic_File_Type: PDF Browse_Graphic: Browse_Graphic_File_Name: I-1420_nj-18_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_nj-18_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_nj-18_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 Chesapeake Bay 4° x 6° Quadrangle, United States and Canada, I-1420 (NJ-18) was compiled by: Emery T. Cleaves and John D. Glaser, Maryland Geological Survey; Alan D. Howard, Department of Environmental Sciences, University of Virginia; Gerald H. Johnson and Pamela C. Peebles, Department of Geology, College of William and Mary; Walter H. Wheeler, Department of geology, University of North Carolina; William D. Sevon, Pennsylvania Geological Survey; Sheldon Judson, Department of Geological and Geophysical Sciences, Princeton University; and James P. Owens, U.S. Geological Survey. The State compilations were edited and integrated by Gerald M. Richmond, David S. Fullerton, and David L. Weide, U.S. Geological Survey. The compilations of geology and hydrology were converted to digital form by Techni Graphic Systems, Inc., of Fort Collins, CO, under contract with the U.S. Geological Survey and modified by Charles A. Bush. The topographic layer, illustrations, word-processor files, and National Atlas coverages were prepared by Bush. Native_Data_Set_Environment: Windows_XP, 4.0, Intel ArcInfo version 9.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Compilation of geologic data: The accuracy of the map data is dependent on (1) the accuracy of the original source data, (2) the accuracy of transfer of that data to larger scale bases by the compilers, (3) the procedures by which the compilers and the editor/integrator simplified or generalized the data, and (4) the procedures used by, and the objectivity exercised by, the editor/integrator in integration of adjacent parts of the map that were prepared by different compilers. Consequently, aspects of accuracy for the data set cannot be quantified. Digitization and attributing of compilation: Digitizing contractor scanned source stable-base material, vectorized scan, attributed files, and produced check plots and coverages. C.A. Bush proofread check plots, added additional attribution, and reviewed digital files; made final corrections as needed; produced graphical files and imported them into graphics program to prepare plot file; proofread cartographic product; prepared illustrations and word-processing files of descriptions of map units and sources of information. The original paper map was scanned and recreated as PDF files. (The original map was thoroughly reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature.) Logical_Consistency_Report: Polygon and chain-node topology are present. The ArcInfo commands BUILD and CLEAN were run to ensure the topological consistency of the data set. All polygons are labeled and were tested by using the ArcInfo command LABELERRORS. All polygons were checked for closure and intersections. Completeness_Report: These coverages contain polygons for all the map units, and lines for all the contacts and marine scarps. 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. Lineage: 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 and Canada Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: I-1420 (NJ-18) Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Source_Scale_Denominator: 1000000 Type_of_Source_Media: mylar separates from printer's negatives for printed map Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1979 Ending_Date: 1982 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: Richmond, Fullerton, and Weide, 1987 Source_Contribution: Linework and point data 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 material for geology and hydrology layers, vectorized scan, converted into ArcInfo coverages and attributed files from published paper map, and produced check plots and coverages. Process_Date: 1998 Process_Step: Process_Description: Bush scanned source stable-base material for topography layer, vectorized scan, and converted into ArcInfo coverages. Process_Date: 2005 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: 2005 Process_Step: Process_Description: C.A. Bush created illustration of the index map on the paper map in a drawing program and changed it to reflect the status of conversion of Quaternary Geologic Atlas quadrangles to digital databases. Bush scanned original printed map and also separated State compilation responsibility and map unit correlation diagrams, cleaned the scans, and converted them to PDF format. Process_Date: 2005 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: 2005 Process_Step: Process_Description: Coverages 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 (Bush). Process_Date: 2005 Process_Step: Process_Description: Illustrations and text files were checked and edited by Bush. Process_Date: 2005 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: 57 Ordinate_Resolution: 57 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The geo_net coverage includes polygons that are map units and open water, and arcs that are contacts, shorelines, 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, "water," "CAROLINA BAY," or "f." (See table below.) AGE--Refers to the age of the map unit and is one of the following: "HOLOCENE," "HOLOCENE AND LATE WISCONSIN," "LATE PLEISTOCENE," "MIDDLE PLEISTOCENE," "MIDDLE OR EARLY PLEISTOCENE," "EARLY PLEISTOCENE," "EARLY PLEISTOCENE TO PLIOCENE," "MIDDLE PLEISTOCENE TO PLIOCENE (INCLUDES MIDDLE PLEISTOCENE? AND MIOCENE?)," "QUATERNARY AND TERTIARY," or blank where not applicable. (See table below.) MAPUNITS--A description of the deposits and materials that make up the map units; blank where not applicable. (See below.) See pamphlet or textonly file for full unit descriptions. 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) > >agg; ALLUVIAL SANDY GRAVEL; HOLOCENE >asa; ALLUVIAL GRAVELLY SAND; HOLOCENE >ala; ALLUVIAL SILT AND CLAY; HOLOCENE >hps; SALINE-MARSH DEPOSIT; HOLOCENE >hp; PEAT; HOLOCENE >be; BEACH AND DUNE SAND; HOLOCENE >bd; BEACH MUD; HOLOCENE > >hs; SWAMP DEPOSIT; HOLOCENE AND LATE WISCONSIN >es; EOLIAN SAND; HOLOCENE AND LATE WISCONSIN > >cba; GRANITIC-BOULDER COLLUVIUM; LATE PLEISTOCENE >cbb; QUARTZITE-BLOCK LOAMY COLLUVIUM; LATE PLEISTOCENE >cbc; CARBONATE-BOULDER CLAYEY COLLUVIUM; LATE PLEISTOCENE >cbd; MAFIC-BOULDER LOAMY COLLUVIUM; LATE PLEISTOCENE >cbe; METARHYOLITE-BOULDER LOAMY COLLUVIUM; LATE PLEISTOCENE >clf; ACID SHALE-CHIP CLAY LOAM COLLUVIUM; LATE PLEISTOCENE >cli; BASALT-CLAST CLAY LOAM COLLUVIUM; LATE PLEISTOCENE >aeh; ALLUVIAL AND ESTUARAINE SAND AND SILT; LATE PLEISTOCENE >bmh; BEACH AND NEARSHORE MARINE SAND; LATE PLEISTOCENE >mlh; MARINE SAND, SILT, AND CLAY; LATE PLEISTOCENE >aei; ALLUVIAL AND ESTUARINE SAND AND SILT; LATE PLEISTOCENE >bmi; BEACH AND NEARSHORE MARINE SAND; LATE PLEISTOCENE >mli; MARINE SAND, SILT, AND CLAY; LATE PLEISTOCENE >aeb; ALLUVIAL AND ESTUARINE SAND AND SILT; LATE PLEISTOCENE >mlb; MARINE SAND, SILT, AND CLAY; LATE PLEISTOCENE >bmb; BEACH AND NEARSHORE MARINE SAND; LATE PLEISTOCENE >aej; ALLUVIAL AND ESTUARINE SAND AND SILT; LATE PLEISTOCENE >bmj; BEACH AND NEARSHORE MARINE SAND; LATE PLEISTOCENE >mlj; MARINE SAND, SILT, AND CLAY; LATE PLEISTOCENE > >aed; ALLUVIAL AND ESTUARINE SAND AND SILT; MIDDLE PLEISTOCENE >bmd; BEACH AND NEARSHORE MARINE SAND; MIDDLE PLEISTOCENE >mld; MARINE SAND, SILT, AND CLAY; MIDDLE PLEISTOCENE >aek; ALLUVIAL AND ESTUARINE SAND AND SILT; MIDDLE PLEISTOCENE >mlk; MARINE SAND, SILT AND CLAY; MIDDLE PLEISTOCENE > >aef; ALLUVIAL AND ESTUARINE SAND AND SILT; MIDDLE OR > EARLY PLEISTOCENE >mlf; MARINE SAND, SILT, AND CLAY; MIDDLE OR EARLY PLEISTOCENE > >ael; ALLUVIAL AND ESTUARINE SAND AND SILT; EARLY PLEISTOCENE >mll; MARINE SAND, SILT, AND CLAY; EARLY PLEISTOCENE > >aeg; ALLUVIAL AND ESTUARINE SAND AND SILT; EARLY PLEISTOCENE > TO PLIOCENE >bmg; BEACH AND NEARSHORE MARINE SAND; EARLY PLEISTOCENE > TO PLIOCENE >mlg; MARINE SAND, SILT, AND CLAY; EARLY PLEISTOCENE > TO PLIOCENE > >asm; LOAMY DECOMPOSITION RESIDUUM AND GRAVELLY SAND; MIDDLE > PLEISTOCENE TO PLIOCENE (INCLUDES MIDDLE PLEISTOCENE? > AND MIOCENE?) > >zgc; CLAYEY SANDY GRAVEL DECOMPOSITION RESIDUUM; QUATERNARY AND > TERTIARY >zsc; SAND AND CLAY DECOMPOSITION RESIDUUM; QUATERNARY AND > TERTIARY >zsr; SANDY DECOMPOSITION RESIDUUM; QUATERNARY AND TERTIARY >zss; CLAYEY SAND DECOMPOSITION RESIDUUM; QUATERNARY AND > TERTIARY >zlc; RED SILTY SAND TO SILTY CLAY DECOMPOSITION RESIDUUM; > QUATERNARY AND TERTIARY >zle; SANDY CLAY TO CLAYEY SAND DECOMPOSITION RESIDUUM; > QUATERNARY AND TERTIARY >zlf; LOAMY DECOMPOSITION RESIDUUM; QUATERNARY AND > TERTIARY >zlg; LOAMY DECOMPOSITION RESIDUUM WITH CRUMBLY QUARTZ CLASTS; > QUATERNARY AND TERTIARY >zcf; CLAYEY SILT AND VERY FINE SAND DECOMPOSITION RESIDUUM; > QUATERNARY AND TERTIARY >rsj; DOLOMITIC SAND SOLUTION RESIDUUM; QUATERNARY AND TERTIARY >rcc; CHERTY CLAY SOLUTION RESIDUUM; QUATERNARY AND TERTIARY >rcj; RED CLAY SOLUTION RESIDUUM; QUATERNARY AND TERTIARY >sga; SANDY CLAYEY SAPROLITIZED GRAVEL; QUATERNARY AND > TERTIARY >sgb; CLAYEY SAPROLITIZED GRAVEL; QUATERNARY AND TERTIARY >ssa; SILTY TO CLAYEY SANDY SAPROLITE, ROCK TORS, AND JOINT-BLOCK > BOULDERS; QUATERNARY AND TERTIARY >ssb; SILTY TO CLAYEY SANDY SAPROLITE; QUATERNARY AND TERTIARY >ssd; SANDY CLAY SAPROLITE; QUATERNARY AND TERTIARY >sla; CLAYEY SAPROLITE; QUATERNARY AND TERTIARY >slb; MICACEOUS SAPROLITE; QUATERNARY AND TERTIARY >slc; SILTY TO CLAYEY SAPROLITE; QUATERNARY AND TERTIARY >slf; THIN SILTY CLAY SAPROLITE ON SERPENTINITE; QUATERNARY AND > TERTIARY >slg; CLAYEY SAPROLITE, ROCK TORS, AND JOINT-BLOCK BOULDERS; > QUATERNARY AND TERTIARY >slh; CLAYEY, SILTY, AND SANDY SAPROLITE, UNDIFFERENTIATED; > QUATERNARY AND TERTIARY >scb; RED, CLAY TO SILTY CLAY SAPROLITE; QUATERNARY AND > TERTIARY > >f MANMADE LAND--A varying mixture of rock fragments, marine and > estuarine sediments, soil, and construction debris that ranges > widely in texture, thickness, and color, and is commonly > unconsolidated. Underlies urban areas, airports, and filled > land bordering Chesapeake Bay and assiciated estuaries > CAROLINA BAY--Shallow, oval or elliptical, generally marshy closed > depression in Atlantic Coastal Plain; 100 m to many kilometers > long. Partly filled with mixed sand, silt, and clay containing > abundant organic matter, and overlain by surface swamp deposits. > Origin debated: attributed to meteorites, upwelling springs, > eddy currents, eolian erosion, solution, or thaw of permafrost > > The geo_net.aat INFO file consists of the following item: LTYPE--Refers to the type of arc and is one of the following: "Contact," "Shoreline," or "Map Boundary." The geo_lin coverage contains lines of MARINE SCARP. The geo_lin.aat INFO file consists of the following user-defined item: LTYPE--The only value is "MARINE SCARP." Hydr_lin is a line coverage created after scanning and vectorizing the hydrographic layer that was used in the original paper map. It has no user-defined attributes. Topo_lin is a line coverage created after scanning and vectorizing the topographic layer that was used in the original paper map. It has no user-defined attributes. Bnd_lin is a line coverage created from 1:2,000,000-scale National Atlas of the United States. The coverage contains lines representing State boundaries. The bnd_lin.aat INFO file contains the following item: LTYPE--Refers to the type of line and contains the values "State Boundary" or "Map Boundary." The coverage is annotated with state names or hydrographic features. Bnd_net 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, Geologic Division, Central Publications Group Contact_Address: Address_Type: Mailing address Address: U.S. Geological Survey, MS902, Box 25046, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-5486 Contact_Electronic_Mail_Address: webmaster@geology.cr.usgs.gov Resource_Description: Miscellaneous Investigations Series Map I-1420 (NJ-18), "Quaternary Geologic Map of the Chesapeake Bay 4° x 6° Quadrangle, United States" Distribution_Liability: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this data set has been used by the U.S. Geological Survey, no warranty, expressed or implied, is made by the USGS as to the accuracy and functioning of the data set and related material nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE, SHP Format_Version_Number: 9.1 File_Decompression_Technique: WinZip Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: No cost for the digital files. 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 (NJ-18), "Quaternary Geologic Map of the Chesapeake Bay 4° x 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://geography.usgs.gov/esic/prices/ for current price of printed edition. Metadata_Reference_Information: Metadata_Date: 200509 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Charles A. Bush Contact_Organization: U.S. Geological Survey Contact_Position: Emeritus Geophysicist Contact_Address: Address_Type: Mailing Address: U.S. Geological Survey, MS980, Box 25046, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (303) 236-4723 Contact_Facsimile_Telephone: (303) 236-0214 Contact_Electronic_Mail_Address: cbush@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998