Identification_Information:

  Citation:

    Citation_Information:

      Originator: Connie L. Dicken

      Originator: Suzanne W. Nicholson

      Originator: John D. Horton

      Originator: Scott A. Kinney

      Originator: Gregory Gunther

      Originator: Michael P. Foose

      Originator: Julia A.L. Mueller

      Publication_Date: 2005

      Title: Integrated Geologic Map Databases for the United States:  Delaware, Maryland, New York, Pennsylvania, and Virginia

      Edition: version 1.0

      Geospatial_Data_Presentation_Form: map

      Series_Information:

        Series_Name: U.S. Geological Survey Open-File Report

        Issue_Identification: 2005-1325

 

      Publication_Information:

        Publication_Place: Reston, VA

        Publisher: U.S. Geological Survey

      Online_Linkage: http://pubs.usgs.gov/of/2005/1325

  Description:

    Abstract: This report presents the results of the USGS Mineral Resources Program activity to compile a national-scale geologic map database at a nominal scale of 1:500,000, to support national and regional level projects, including mineral resource and geoenvironmental assessments. The only comprehensive sources for input into regional- and national-scale geologic maps are state geologic maps with scales ranging from 1:100,000 to 1:1,000,000.  Digital versions of these state maps form the core of what is presented here.  Because no adequate geologic map exists for the state of Alaska, it is being compiled as regional blocks of 3 degree quadrangles that also form part of this national database. It is expected that this series will completed by approximately the end of 2007.  These maps and databases are being released in blocks of states or, in the case of Alaska, as compiled blocks of 1:250,000-scale quadrangles as chapters in this series.  For Alaska, formal maps as well as databases are being published here, whereas for the conterminous U.S. only state databases are presented, because published maps for most states already exist.  For Alaska these regional compilations will form the base for compiling a new geologic map of the state.  As documented in CONUS documentation, standards for the conterminous U.S. are somewhat different than those for Alaska and Hawaii.

    Purpose: A primary goal of this work is to develop geologic map datasets with standardized structure and attribution.  The database design and standards are documented in CONUS documentation of this report.  The intent is that contiguous databases can be merged seamlessly and without any additional effort.  In addition to a common database structure, the conterminous U.S. state databases (the contiguous 48 states) have been fitted to a set of standard state boundaries derived from the USGS Digial Line Graph 1:100,000 quadrangle boundaries (Johnson and Leveritch, 1998) so that, when states are merged, they match without slivers or overlap.  No attempt has been made to reconcile differences in mapping across state boundaries.

    Supplemental_Information:

      This database consists of five major Arc/Info GIS datasets for each state;

      - one: geologic map with formations,

      - two: faults (where present),

      - three: dikes (where present),

      - four: miscellaneous line features (where present),

      - five: miscellaneous point features (where present).

  Time_Period_of_Content:

    Time_Period_Information:

      Single_Date/Time:

        Calendar_Date: 2005

    Currentness_Reference: publication date

 

  Status:

    Progress: Complete

    Maintenance_and_Update_Frequency: none planned

 

  Spatial_Domain:

    Bounding_Coordinates:

      West_Bounding_Coordinate: -75.788933 (decimal degrees)

      East_Bounding_Coordinate: -74.878708 (decimal degrees)

 

      North_Bounding_Coordinate: 39.839458 (decimal degrees)

      South_Bounding_Coordinate: 38.450516 (decimal degrees)

 

  Keywords:

    Theme:

      Theme_Keyword_Thesaurus: none

      Theme_Keyword: geology

    Place:

      Place_Keyword_Thesaurus: none

      Place_Keyword: USA

      Place_Keyword: Delaware

 

    Theme:

      Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented

      Theme_Keyword: 3100 - Vector

      Theme_Keyword: 3110 - ESRI

      Theme_Keyword: 3112 - export

      Theme_Keyword: 1100 - Geology

      Theme_Keyword: 1101 - General

    Place:

      Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0

      Place_Keyword: US10 = Delaware

  Access_Constraints: none

 

  Use_Constraints:

    This database is not meant to be used or displayed at any scale other

    than 1:500,000.

 

    Any hardcopies utilizing these data sets shall clearly indicate

    their source.  If the licensee has modified the data in any way

    they are obligated to describe the types of modifications they

    have performed on the hardcopy map.  Licensee specifically agrees

    not to misrepresent these data sets, nor to imply that changes they

    made were approved by the U.S. Geological Survey.

 

  Point_of_Contact:

    Contact_Information:

      Contact_Person_Primary:

        Contact_Person: Suzanne W. Nicholson

 

        Contact_Organization: U.S. Geological Survey

      Contact_Address:

        Address_Type: mailing and physical address

        Address: 12201 Sunrise Valley Dr.  MS954

        City: Reston

        State_or_Province: VA

        Postal_Code: 20192

        Country: USA

      Contact_Voice_Telephone: 703-648-6344

      Contact_Electronic_Mail_Address: swnich@usgs.gov

 

  Data_Set_Credit:

    State Geologic Map Compilation (SGMC) activity of the National Surveys and Analysis

    projects of the US Geological Survey Mineral Resources Program.

 

  Native_Data_Set_Environment:

    ARC/INFO version 8.3 and 9.0

    ArcView 3.2

Data_Quality_Information:

  Attribute_Accuracy:

    Attribute_Accuracy_Report: The values of the attributes ROCKTYPE1 and ROCKTYPE2 were assigned based on the information in the legends of the source maps (most of which are paper).  The definitions of these values are described in the draft document Geologic Map Classification version 6.1 (Johnson and others); available at the following website:  http://www.nadm-geo.org/dmdt/index.html

  Logical_Consistency_Report: All internal polygons were checked for closure with vendor software and on hard copy plots.  Overshoots and undershoots have been deleted or corrected as appropriate.

  Completeness_Report: Bodies of water are classified as water, and the geologic units underlying them are not included in this coverage.

  Positional_Accuracy:

    Horizontal_Positional_Accuracy:

      Horizontal_Positional_Accuracy_Report:

        Accuracy of Delaware state boundary and those arcs intersecting it: The accuracy of the state boundary arcs is based on the 1:100,000 scale original data used to produce this boundary.  (Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished).

 

        Those internal arcs intersecting the state boundary were extended or shortened as needed to complete polygons, possibly creating a small amount of error.

  Lineage:

    Source_Information:

      Source_Citation:

        Citation_Information:

          Originator: Spoljaric, Nenad

          Originator: Jordan, Robert R

          Publication_Date: 1966

          Title: Generalized Geologic Map of Delaware

          Geospatial_Data_Presentation_Form: map

          Publication_Information:

            Publication_Place: Delaware

            Publisher: Delaware Geological Survey

          Online_Linkage: none

      Source_Scale_Denominator: 300,000

      Type_of_Source_Media: vector

      Source_Time_Period_of_Content:

        Time_Period_Information:

          Single_Date/Time:

            Calendar_Date: 1966

        Source_Currentness_Reference: publication date

      Source_Citation_Abbreviation: de geology

      Source_Contribution: provided geology for state map

    Source_Information:

      Source_Citation:

        Citation_Information:

          Originator: Bruce R. Johnson

          Publication_Date: unpublished

          Title: 1:100,000 Scale State Boundaries of the Conterminous United States

          Geospatial_Data_Presentation_Form: vector data

          Other_Citation_Details: Arc/INFO coverage developed by Bruce Johnson.  Derived from USGS 100,000-scale DLG boundary layer quadrangles.

      Source_Scale_Denominator: 100,000

      Type_of_Source_Media: online

      Source_Time_Period_of_Content:

        Time_Period_Information:

          Single_Date/Time:

            Calendar_Date: 1998

        Source_Currentness_Reference: unknown

      Source_Citation_Abbreviation: state boundaries

      Source_Contribution: provided linework of the conterminous state boundaries

    Source_Information:

      Source_Citation:

        Citation_Information:

          Originator: Bruce R. Johnson

          Publication_Date: unpublished

          Title: Geologic Map Unit Classification, ver. 6.1

          Geospatial_Data_Presentation_Form: unknown

          Other_Citation_Details: Document has been modified and is included in Appedices of the publication.

      Source_Scale_Denominator: none

      Type_of_Source_Media: online; http:/geology.usgs.gov/dm

      Source_Time_Period_of_Content:

        Time_Period_Information:

          Single_Date/Time:

            Calendar_Date: 1998

        Source_Currentness_Reference: unknown

      Source_Citation_Abbreviation: lithclass

      Source_Contribution: Source of lithologic codes and specific rock names found in ROCKTYPE1 and ROCKTYPE2.

    Process_Step:

      Process_Description: The purpose of this standardization is to allow all covers to be seamlessly joined without any additional effort to form regional or national level digital maps. Note that for Alaska, the state is being compiled as blocks of 1:250k quadrangles that will ultimately be used to compile a new state map.  Douglas Stoeser and Ric Wilson are co-coordinators for the overall State Geologic Map Compilation (SGMC) effort, with Stoeser coordinating work on the mainland states and Wilson coordinating work for Alaska and Hawaii.

      Process_Date: 2003 - 2005

    Process_Step:

      Process_Description:

        C.L. Dicken obtained the digital geologic map of Delaware from Julia Mueller.          The coverage was re-projected into the following:

 

        projection:           Lambert Conformal Conic

        units:                meters

        datum:                NAD27

        standard parallel 1: 33 0 0.000

        standard parallel 2: 45 0 0.000

        central meridian:     -100 0 0.000

        reference latitude:   0 0 0.000

        false easting:        0.00000

        false northing:       0.00000

 

 

 

        (Note:  Attributes associated with the generation of the coverages were not deleted.

        PAT - shape, area, perimeter, coverage#, and coverage-id

        AAT - shape, fnode#, tnode#, lnode#, rnode#, length, coverage#, and coverage-id)

 

        All attributes were deleted except map_code.

        The values from map_code where then calculated into a new field called orig_label.

      Process_Date: 2005

    Process_Step:

      Process_Description:

        The relevant state outline (arcs) was removed from the coverage and replaced with the arcs from the 1:100,000 Scale State Boundaries of the Conterminous United States.

 

        This allows for a seamless fit of each state to a standard state boundary base.

      Process_Date: 2005

    Process_Step:

      Process_Description:

        The following attributes were exported from Filemaker as a .dbf:

        orig_label, map_symbol2, unit_link, reference_id, unit_age, rocktype1, and rocktype2.

 

        orig_label  reflects the original map symbol used on the source map

 

        map_symbol2  reflects map-symbol1 with the addition of a province number (renamed sgmc_label in PAT)

 

        unit_link  is an auto generated field based on map-symbol2 and the state abbreviation (e.g. IN001) that produces a unique identifier for each map unit

 

        reference_id was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework and other references used to describe the age or lithologies of the unit. (renamed source in PAT).

 

        unit_age  was populated with general age assignment

 

        rocktype1  records dominant lithology (must be >50% of unit), using standardized data dictionary

 

        rocktype2  records second most dominant lithology, using standardized data dictionary

 

 

 

        The attributes were then converted using the following structure:

 

        item name:      orig_label

        width:          12

        output:         12

        type:           c

 

        item name:      sgmc_label

        width:          16

        output:         16

        type:           c

 

        item name:      unit_link

        width:          18

        output:         18

        type:           c

 

        item name:      source

        width:          6

        output:         8

        type:           c

 

        item name:      unit_age

        width:          60

        output:         60

        type:           c

 

        item name:      rocktype1

        width:          40

        output:         40

        type:           c

 

        item name:      rocktype2

        width:          40

        output:         40

        type:           c

      Process_Date: 2005

    Process_Step:

      Process_Description: Once the .dbf was in the correct format with standardized column widths and data structure, it was converted into a lookup table (.lut) in Arc/Info.  Then a joinitem was performed to join the look-up table to the polygon attribute table.  orig_label was used as the merge item.

      Process_Date: 2005

    Process_Step:

      Process_Description:

        Next, in preparing the uniform .aat file, the following items were added to the table:

 

        item name:  arc-code

        width:    3

        output:   3

        type:     i

 

        item name:  arc-para1

        width:    3

        output:   3

        type:     i

 

        item name:  arc-para2

        width:    3

        output:   3

        type:     i

 

        item name:  source

        width:    6

        output:   8

        type:     c

 

      Process_Date: 2005

    Process_Step:

      Process_Description:

        Arc-code was populated using the paper map source to tag the lines using the AAT line type data dictionary (see CONUS documentation in this series).

 

        Arc-para1 was populated when additional information was available such as identifying the upthrown side of a fault or direction of thrusting on a fault. (see CONUS documentation)

 

        Arc-para2 is a scratch field that is used mostly in Alaska.

 

        Source was populated with an alphanumeric code (e.g. US001) that designates the source used for the linework.

 

      Process_Date: 2005

    Process_Step:

      Process_Description:

        Once the .aat and the .pat were populated with the correct attributes, the coverage was exported as an .e00 file (DEgeol_lcc.e00).

 

        Then it was unprojected into geographic coordinates and exported again (DEgeol_dd.e00).

      Process_Date: 2005

    Process_Step:

      Process_Description: Finally, the geology lines and geology polygons were converted into shapefiles; in both geographic coordinates and in Lambert Conformal Conic projection.

      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: Lambert Conformal Conic

        Lambert_Conformal_Conic:

          Standard_Parallel: 33

          Standard_Parallel: 45

          Longitude_of_Central_Meridian: -100.0

          Latitude_of_Projection_Origin: 0

          False_Easting: 0.00000

          False_Northing: 0.00000

      Planar_Coordinate_Information:

        Planar_Coordinate_Encoding_Method: coordinate pair

        Coordinate_Representation:

          Abscissa_Resolution: 0.01

          Ordinate_Resolution: 0.01

        Planar_Distance_Units: Meters

    Geodetic_Model:

      Horizontal_Datum_Name: North American Datum of 1927

      Ellipsoid_Name: Clarke 1866

      Semi-major_Axis: 6378206.4

      Denominator_of_Flattening_Ratio: 294.98

Entity_and_Attribute_Information:

  Detailed_Description:

    Entity_Type:

      Entity_Type_Label: DE_geol.pat

      Entity_Type_Definition: Polygon attribute table for the Delaware geologic coverage.

      Entity_Type_Definition_Source: ESRI

    Attribute:

      Attribute_Label: ORIG_LABEL

      Attribute_Definition:

        unmodified map unit symbol from source cover.

 

        type: character

        width: 12

        output width: 12

      Attribute_Definition_Source: Doug Stoeser

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: amp

          Enumerated_Domain_Value_Definition: Amphibolite

        Enumerated_Domain:

          Enumerated_Domain_Value: bgd

          Enumerated_Domain_Value_Definition: Banded Gneiss

        Enumerated_Domain:

          Enumerated_Domain_Value: bm

          Enumerated_Domain_Value_Definition: Bryn Mawr Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: c

          Enumerated_Domain_Value_Definition: Cockeysville Marble

        Enumerated_Domain:

          Enumerated_Domain_Value: gb

          Enumerated_Domain_Value_Definition: Gabbro

        Enumerated_Domain:

          Enumerated_Domain_Value: grd

          Enumerated_Domain_Value_Definition: Port Deposit Granodiorite

        Enumerated_Domain:

          Enumerated_Domain_Value: grn

          Enumerated_Domain_Value_Definition: Arden Granite

        Enumerated_Domain:

          Enumerated_Domain_Value: Km

          Enumerated_Domain_Value_Definition: Magothy Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Kmlns

          Enumerated_Domain_Value_Definition: Mt. Laurel-Navesink Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Kmv

          Enumerated_Domain_Value_Definition: Merchantville Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Kp

          Enumerated_Domain_Value_Definition: Potomac Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Krb

          Enumerated_Domain_Value_Definition: Redbank Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Kw

          Enumerated_Domain_Value_Definition: Wenonah Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: pt

          Enumerated_Domain_Value_Definition: Pegmatite

        Enumerated_Domain:

          Enumerated_Domain_Value: sp

          Enumerated_Domain_Value_Definition: Serpentine

        Enumerated_Domain:

          Enumerated_Domain_Value: Tb

          Enumerated_Domain_Value_Definition: Unit B

        Enumerated_Domain:

          Enumerated_Domain_Value: Tc

          Enumerated_Domain_Value_Definition: Unit C

        Enumerated_Domain:

          Enumerated_Domain_Value: Tch

          Enumerated_Domain_Value_Definition: Chesapeake Group

        Enumerated_Domain:

          Enumerated_Domain_Value: Tr

          Enumerated_Domain_Value_Definition: Rancocas Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Water

          Enumerated_Domain_Value_Definition: water

        Enumerated_Domain:

          Enumerated_Domain_Value: ws

          Enumerated_Domain_Value_Definition: Wissahickon Schist

    Attribute:

      Attribute_Label: SGMC_LABEL

      Attribute_Definition:

        orig_label + ;n where n= province number (n=0 if no province number)

 

        type: character

        width: 16

        output width: 16

      Attribute_Definition_Source: Doug Stoeser

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: amp;0

          Enumerated_Domain_Value_Definition: Amphibolite

        Enumerated_Domain:

          Enumerated_Domain_Value: bgd;0

          Enumerated_Domain_Value_Definition: Banded Gneiss

        Enumerated_Domain:

          Enumerated_Domain_Value: bm;0

          Enumerated_Domain_Value_Definition: Bryn Mawr Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: c;0

          Enumerated_Domain_Value_Definition: Cockeysville Marble

        Enumerated_Domain:

          Enumerated_Domain_Value: gb;0

          Enumerated_Domain_Value_Definition: Gabbro

        Enumerated_Domain:

          Enumerated_Domain_Value: grd;0

          Enumerated_Domain_Value_Definition: Port Deposit Granodiorite

        Enumerated_Domain:

          Enumerated_Domain_Value: grn;0

          Enumerated_Domain_Value_Definition: Arden Granite

        Enumerated_Domain:

          Enumerated_Domain_Value: Km;0

          Enumerated_Domain_Value_Definition: Magothy Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Kmlns;0

          Enumerated_Domain_Value_Definition: Mt. Laurel-Navesink Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Kmv;0

          Enumerated_Domain_Value_Definition: Merchantville Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Kp;0

          Enumerated_Domain_Value_Definition: Potomac Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Krb;0

          Enumerated_Domain_Value_Definition: Redbank Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: Kw;0

          Enumerated_Domain_Value_Definition: Wenonah Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: pt;0

          Enumerated_Domain_Value_Definition: Pegmatite

        Enumerated_Domain:

          Enumerated_Domain_Value: sp;0

          Enumerated_Domain_Value_Definition: Serpentine

        Enumerated_Domain:

          Enumerated_Domain_Value: Tb;0

          Enumerated_Domain_Value_Definition: Unit B

        Enumerated_Domain:

          Enumerated_Domain_Value: Tc;0

          Enumerated_Domain_Value_Definition: Unit C

        Enumerated_Domain:

          Enumerated_Domain_Value: Tch;0

          Enumerated_Domain_Value_Definition: Chesapeake Group

        Enumerated_Domain:

          Enumerated_Domain_Value: Tr;0

          Enumerated_Domain_Value_Definition: Rancocas Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: water;0

          Enumerated_Domain_Value_Definition: water

        Enumerated_Domain:

          Enumerated_Domain_Value: ws;0

          Enumerated_Domain_Value_Definition: Wissahickon Schist

    Attribute:

      Attribute_Label: unit_link

      Attribute_Definition:

        composite map label = ST + sgmc_label

        This creates a unique identifier for every unit in the CONUS (continental United States) covers.

 

        type: character

        width: 18

        output width: 18

      Attribute_Definition_Source: Doug Stoeser

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: DEamp;0

          Enumerated_Domain_Value_Definition: Amphibolite

        Enumerated_Domain:

          Enumerated_Domain_Value: DEbgd;0

          Enumerated_Domain_Value_Definition: Banded Gneiss

        Enumerated_Domain:

          Enumerated_Domain_Value: DEbm;0

          Enumerated_Domain_Value_Definition: Bryn Mawr Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: DEc;0

          Enumerated_Domain_Value_Definition: Cockeysville Marble

        Enumerated_Domain:

          Enumerated_Domain_Value: DEgb;0

          Enumerated_Domain_Value_Definition: Gabbro

        Enumerated_Domain:

          Enumerated_Domain_Value: DEgrd;0

          Enumerated_Domain_Value_Definition: Port Deposit Granodiorite

        Enumerated_Domain:

          Enumerated_Domain_Value: DEgrn;0

          Enumerated_Domain_Value_Definition: Arden Granite

        Enumerated_Domain:

          Enumerated_Domain_Value: DEKm;0

          Enumerated_Domain_Value_Definition: Magothy Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: DEKmlns;0

          Enumerated_Domain_Value_Definition: Mt. Laurel-Navesink Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: DEKmv;0

          Enumerated_Domain_Value_Definition: Merchantville Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: DEKp;0

          Enumerated_Domain_Value_Definition: Potomac Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: DEKrb;0

          Enumerated_Domain_Value_Definition: Redbank Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: DEKw;0

          Enumerated_Domain_Value_Definition: Wenonah Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: DEpt;0

          Enumerated_Domain_Value_Definition: Pegmatite

        Enumerated_Domain:

          Enumerated_Domain_Value: DEsp;0

          Enumerated_Domain_Value_Definition: Serpentine

        Enumerated_Domain:

          Enumerated_Domain_Value: DETb;0

          Enumerated_Domain_Value_Definition: Unit B

        Enumerated_Domain:

          Enumerated_Domain_Value: DETc;0

          Enumerated_Domain_Value_Definition: Unit C

        Enumerated_Domain:

          Enumerated_Domain_Value: DETch;0

          Enumerated_Domain_Value_Definition: Chesapeake Group

        Enumerated_Domain:

          Enumerated_Domain_Value: DETr;0

          Enumerated_Domain_Value_Definition: Rancocas Formation

        Enumerated_Domain:

          Enumerated_Domain_Value: DEwater;0

          Enumerated_Domain_Value_Definition: water

        Enumerated_Domain:

          Enumerated_Domain_Value: DEws;0

          Enumerated_Domain_Value_Definition: Wissahickon Schist

    Attribute:

      Attribute_Label: source

      Attribute_Definition:

        An alphanumeric code (e.g. US001) that designates the source material used.

 

        type: character

        width: 6

        output width: 8

      Attribute_Definition_Source: Doug Stoeser

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: DE001

 

          Enumerated_Domain_Value_Definition: Spoljaric, Nenad and Jordan, Robert R., 1966, Generalized Geologic Map of Delaware, State of Delaware, Delaware Geological Survey, scale ca. 1:300,000.

    Attribute:

      Attribute_Label: unit_age

      Attribute_Definition:

        geologic age from the source map used.

 

        type: character

        width: 60

        output width: 60

      Attribute_Definition_Source: Doug Stoeser

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: Cretaceous

          Enumerated_Domain_Value: Cretaceous-Tertiary

          Enumerated_Domain_Value: Paleozoic

          Enumerated_Domain_Value: Tertiary

          Enumerated_Domain_Value: age undetermined

    Attribute:

      Attribute_Label: rocktype1

      Attribute_Definition:

        The predominant lithology found in the formation.

 

        type: character

        width: 40

        output width: 40

      Attribute_Definition_Source: Johnson Lith Class 6.1a

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: amphibolite

          Enumerated_Domain_Value: gabbro

          Enumerated_Domain_Value: gneiss

          Enumerated_Domain_Value: granite

          Enumerated_Domain_Value: granodiorite

          Enumerated_Domain_Value: limestone

          Enumerated_Domain_Value: mica schist

          Enumerated_Domain_Value: pegmatite

          Enumerated_Domain_Value: sand

          Enumerated_Domain_Value: serpentinite

          Enumerated_Domain_Value: silt

          Enumerated_Domain_Value: water

    Attribute:

      Attribute_Label: rocktype2

      Attribute_Definition:

        The second most predominant lithology in the formation.

 

        type: character

        width: 40

        output width: 40

      Attribute_Definition_Source: Johnson Lith Class 6.1

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: clay or mud

          Enumerated_Domain_Value: dolostone (dolomite)

          Enumerated_Domain_Value: gneiss

          Enumerated_Domain_Value: sand

          Enumerated_Domain_Value: silt

  Detailed_Description:

    Entity_Type:

      Entity_Type_Label: de_geol.aat

      Entity_Type_Definition: Arc attribute table for Delaware geologic coverage.

      Entity_Type_Definition_Source: ESRI

    Attribute:

      Attribute_Label: arc-code

      Attribute_Definition:

        Unique identifier for the line feature

 

        type: integer

        width: 3

        output width: 3

      Attribute_Definition_Source: AAT data dictionary

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: 1

          Enumerated_Domain_Value_Definition: contact, location certain

        Enumerated_Domain:

          Enumerated_Domain_Value: 7

          Enumerated_Domain_Value_Definition: shoreline or riverbank

        Enumerated_Domain:

          Enumerated_Domain_Value: 124

          Enumerated_Domain_Value_Definition: state boundary

    Attribute:

      Attribute_Label: arc-para1

      Attribute_Definition:

        Used for "decorated" lines where additional information is needed.

 

        type: integer

        width: 3

        output width: 3

      Attribute_Definition_Source: AAT data dictionary

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: 0

          Enumerated_Domain_Value_Definition: no additional information

    Attribute:

      Attribute_Label: arc-para2

      Attribute_Definition:

        "Scratch" field used mostly in Alaska.

 

        type: integer

        width: 3

        output width: 3

      Attribute_Definition_Source: AAT data dictionary

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: 0

          Enumerated_Domain_Value_Definition: no additional information

    Attribute:

      Attribute_Label: source

      Attribute_Definition:

        An alphanumeric code (e.g. US001) that designates the source material used.

 

        type: character

        width: 6

        output width: 8

      Attribute_Definition_Source: Doug Stoeser

      Attribute_Domain_Values:

        Enumerated_Domain:

          Enumerated_Domain_Value: DE001

 

          Enumerated_Domain_Value_Definition: Spoljaric, Nenad and Jordan, Robert R., 1966, Generalized Geologic Map of Delaware, State of Delaware, Delaware Geological Survey, scale ca. 1:300,000.

        Enumerated_Domain:

          Enumerated_Domain_Value: US001

          Enumerated_Domain_Value_Definition: Johnson, Bruce R. and Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United States: U.S. Geological Survey, unpublished (see metadata file: st100kmeta.txt, Chapter A)

  Overview_Description:

    Entity_and_Attribute_Overview:

      Coding for polygon attributes:

 

      NAME:           FEATURE:

      orig_label   unmodified map unit symbols from source cover

      sgmc_label   orig_label modified for standard geologic age symbols and an

      integer code added for province

      unit_link    sgmc_label and a state code identifier

      source       reference to source of data

      unit_age     geologic age

      rocktype1    predominant lithology

      rocktype2    second most predominant lithology

 

      Coding for arc attributes:

 

      NAME:           FEATURE:

      arc-code     unique integer identifier

      arc-para1    used where additional information is needed

      arc-para2    scratch field

      source       reference to source of data

 

      Coding for point attributes:

 

      NAME:           FEATURE:

      point_feature  name of feature on map

      source         reference to source of data

 

      Coding for dikes (special arcs) attributes:

 

      NAME:           FEATURE:

      orig_label   unmodified map unit symbols from source cover

      sgmc_label   orig_label modified for standard geologic age symbols and an

      integer code added for province

      arc-code     unique integer identifier

      dike_lith    general lithology

      dike_age     geologic age

      source       reference to source of data

 

    Entity_and_Attribute_Detail_Citation: ESRI

Distribution_Information:

  Distributor:

    Contact_Information:

      Contact_Organization_Primary:

        Contact_Organization:

          U.S. Geological Survey Information Services

          Reston-ESIC

      Contact_Address:

        Address_Type: mailing and physical address

        Address:

          U.S. Geological Survey

          507 National Center

        City: Reston

        State_or_Province: Virginia

        Postal_Code: 20192

        Country: USA

      Contact_Voice_Telephone:

        1-888-ASK-USGS

        or

        1-703-648-5953

      Contact_Electronic_Mail_Address: http://www.usgs.gov/contact/

  Distribution_Liability:

    Any use of trade, product, or firm names is for

    descriptive purposes only and does not imply endorsement by the USGS.

    Although these data have been used by the USGS and have been successfully

    imported into data base programs, no warranty, expressed or implied, is made

    by the USGS as to how successfully or accurately the data can be imported into

    any specific application software running on any specific hardware platform.

    The fact of distribution shall not constitute any such warranty, and no

    responsibility is assumed by the USGS in connection therewith.

    This data base GIS is not meant to be used or displayed at any scale other than 1:500,000.

  Resource_Description:

  Standard_Order_Process:

    Digital_Form:

      Digital_Transfer_Information:

        Format_Name: ARC/INFO export

        Format_Version_Number: 9.0

        Format_Information_Content: Geologic units and structural features

        File_Decompression_Technique: gzip and tar

      Digital_Transfer_Option:

        Online_Option:

          Computer_Contact_Information:

            Network_Address:

              Network_Resource_Name: http://pubs.usgs.gov/

    Fees: none

Metadata_Reference_Information:

  Metadata_Date: 20050909

  Metadata_Contact:

    Contact_Information:

      Contact_Organization_Primary:

        Contact_Organization: U.S. Geological Survey

        Contact_Person: Connie L. Dicken

      Contact_Address:

        Address_Type: mailing and physical address

        Address: 12201 Sunrise Valley Dr.  MS954

        City: Reston

        State_or_Province: VA

        Postal_Code: 20192

        Country: USA

      Contact_Voice_Telephone: 703-648-6482

      Contact_Electronic_Mail_Address: cdicken@usgs.gov

  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata ("CSDGM version 2")

  Metadata_Standard_Version: FGDC-STD-001-1998