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 Chapter A of this series.  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: -79.487450 (decimal degrees)
      East_Bounding_Coordinate: -74.907940 (decimal degrees)

      North_Bounding_Coordinate: 39.722987 (decimal degrees)
      South_Bounding_Coordinate: 37.886571 (decimal degrees)

  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: none
      Theme_Keyword: geology
    Place:
      Place_Keyword_Thesaurus: none
      Place_Keyword: USA
      Place_Keyword: Maryland

    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: US24 = Maryland
  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 Maryland 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: Cleaves, E.T.
          Originator: Edwards, J., Jr.
          Originator: Glaserm J.D.
          Publication_Date: 1968
          Title: Geologic Map of Maryland
          Geospatial_Data_Presentation_Form: map
          Publication_Information:
            Publication_Place: Baltimore, Maryland
            Publisher: Maryland Geological Survey
          Other_Citation_Details: Unpublished digital version of the Maryland state geologic map was digitized by the USGS Water Resources Office in Towson, MD and provided vector data.  
          Online_Linkage: none
      Source_Scale_Denominator: 250,000
      Type_of_Source_Media: paper map
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1968
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: md 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:
        A digital geologic map of Maryland was provided by the State of Maryland through Jim Manning through ftp to Julia Mueller.  C.L. Dicken received the digital file.

        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 (MDgeol_lcc.e00).

        Then it was unprojected into geographic coordinates and exported again (MDgeol_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: MD_geol.pat
      Entity_Type_Definition: Polygon attribute table for the Maryland 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: bgb
          Enumerated_Domain_Value_Definition: Baltimore Gabbro Complex
        Enumerated_Domain:
          Enumerated_Domain_Value: Ca
          Enumerated_Domain_Value_Definition: Chilhowee Group; Antietam Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Ce
          Enumerated_Domain_Value_Definition: Elbrook Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: Cf
          Enumerated_Domain_Value_Definition: Frederick Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: Ct
          Enumerated_Domain_Value_Definition: Tomstown Dolomite
        Enumerated_Domain:
          Enumerated_Domain_Value: Cwb
          Enumerated_Domain_Value_Definition: Waynesboro Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: cc
          Enumerated_Domain_Value_Definition: Cardiff Metaconglomerate
        Enumerated_Domain:
          Enumerated_Domain_Value: cm
          Enumerated_Domain_Value_Definition: Cockeysville Marble
        Enumerated_Domain:
          Enumerated_Domain_Value: Dch
          Enumerated_Domain_Value_Definition: "Chemung" Formation, Parkhead Sandstone, Brallier Formation, and Harrell Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: Dh
          Enumerated_Domain_Value_Definition: Hampshire Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Dhn
          Enumerated_Domain_Value_Definition: Hamilton Group (including Mahantango Formation and Marcellus Shale), and including Tioga Metabentontite Bed, and Needmore Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: Do
          Enumerated_Domain_Value_Definition: Oriskany Group including Ridgeley Sandstone and Shriver Chert
        Enumerated_Domain:
          Enumerated_Domain_Value: DShk
          Enumerated_Domain_Value_Definition: Helderberg Formation and Keyser Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: gm
          Enumerated_Domain_Value_Definition: Georgetown Mafic Complex
        Enumerated_Domain:
          Enumerated_Domain_Value: hf
          Enumerated_Domain_Value_Definition: Chilhowee Group;  Harpers Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: if
          Enumerated_Domain_Value_Definition: Ijamsville Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: if-ms
          Enumerated_Domain_Value_Definition: Ijamsville Formation and Marburg Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: jg
          Enumerated_Domain_Value_Definition: James Run Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: Km
          Enumerated_Domain_Value_Definition: Magothy Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Kma
          Enumerated_Domain_Value_Definition: Matawan Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Kmo
          Enumerated_Domain_Value_Definition: Monmouth Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Kp
          Enumerated_Domain_Value_Definition: Potomac Group, including Raritan and Patapsco Formations, Arundel Clay, and Patuxent Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: lf

          Enumerated_Domain_Value_Definition: Chilhowee Group; Loudoun Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: lmr

          Enumerated_Domain_Value_Definition: Libertytown Metarhyolite
        Enumerated_Domain:
          Enumerated_Domain_Value: Mg

          Enumerated_Domain_Value_Definition: Greenbrier Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: mgb

          Enumerated_Domain_Value_Definition: Metagabbro and Amphibolite
        Enumerated_Domain:
          Enumerated_Domain_Value: Mmc

          Enumerated_Domain_Value_Definition: Mauch Chunk Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Mp

          Enumerated_Domain_Value_Definition: Pocono Group, including the Purslane Sandstone and Rockwell Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: ms

          Enumerated_Domain_Value_Definition: Marburg Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: OCc

          Enumerated_Domain_Value_Definition: Conococheague Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: OCg

          Enumerated_Domain_Value_Definition: Grove Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: Ocs

          Enumerated_Domain_Value_Definition: Chambersburg Limestone and St. Paul Group (including New Market Limestone and Row Park Limestone)
        Enumerated_Domain:
          Enumerated_Domain_Value: Oj

          Enumerated_Domain_Value_Definition: Juniata Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Om

          Enumerated_Domain_Value_Definition: Martinsburg Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Ops

          Enumerated_Domain_Value_Definition: Pinesburg Station Dolomite
        Enumerated_Domain:
          Enumerated_Domain_Value: Orr

          Enumerated_Domain_Value_Definition: Rockdale Run Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Os

          Enumerated_Domain_Value_Definition: Stonehenge Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: Pap

          Enumerated_Domain_Value_Definition: Allegheny Formation and Pottsville Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Pc

          Enumerated_Domain_Value_Definition: Conemaugh Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Pm

          Enumerated_Domain_Value_Definition: Monongahela Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: pbs

          Enumerated_Domain_Value_Definition: Peach Bottom Slate
        Enumerated_Domain:
          Enumerated_Domain_Value: pCbg

          Enumerated_Domain_Value_Definition: Baltimore Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: pCc

          Enumerated_Domain_Value_Definition: Catoctin Metabasalt
        Enumerated_Domain:
          Enumerated_Domain_Value: pCg

          Enumerated_Domain_Value_Definition: Granodiorite and Biotite Granite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: pCmv

          Enumerated_Domain_Value_Definition: Metarhyolite and Aasociated Pyroclastic Sediments
        Enumerated_Domain:
          Enumerated_Domain_Value: pCsr

          Enumerated_Domain_Value_Definition: Swift Run Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Pd

          Enumerated_Domain_Value_Definition: Dunkard Group
        Enumerated_Domain:
          Enumerated_Domain_Value: Pze

          Enumerated_Domain_Value_Definition: Ellicott City Granodiorite
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzg

          Enumerated_Domain_Value_Definition: Guilford Quartz Monznoite
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzgd

          Enumerated_Domain_Value_Definition: Quartz Gabbro and Quartz Diorite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzgg

          Enumerated_Domain_Value_Definition: Gunpowder Granite
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzk

          Enumerated_Domain_Value_Definition: Kensington Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzmg

          Enumerated_Domain_Value_Definition: Muscovite Quartz Monzonite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzn

          Enumerated_Domain_Value_Definition: Norbeck Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzp

          Enumerated_Domain_Value_Definition: Pegmatite Dikes
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzpd

          Enumerated_Domain_Value_Definition: Port Deposit Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzr

          Enumerated_Domain_Value_Definition: Relay Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: Pzw

          Enumerated_Domain_Value_Definition: Woodstock Quartz Monznoite
        Enumerated_Domain:
          Enumerated_Domain_Value: Qdu

          Enumerated_Domain_Value_Definition: Quaternary Deposits Undivided
        Enumerated_Domain:
          Enumerated_Domain_Value: Ql

          Enumerated_Domain_Value_Definition: Lowland Deposits
        Enumerated_Domain:
          Enumerated_Domain_Value: QTu

          Enumerated_Domain_Value_Definition: Upland Deposits (Western Shore)
        Enumerated_Domain:
          Enumerated_Domain_Value: Qu

          Enumerated_Domain_Value_Definition: Upland Deposits (Eastern Shore)
        Enumerated_Domain:
          Enumerated_Domain_Value: Sc

          Enumerated_Domain_Value_Definition: Clinton Group, including Rochester Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: scm

          Enumerated_Domain_Value_Definition: Sams Creek Metabasalt
        Enumerated_Domain:
          Enumerated_Domain_Value: sf

          Enumerated_Domain_Value_Definition: Setters Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Sm

          Enumerated_Domain_Value_Definition: McKenzie Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: sq

          Enumerated_Domain_Value_Definition: Sugarloaf Mountain Quartzite
        Enumerated_Domain:
          Enumerated_Domain_Value: srl

          Enumerated_Domain_Value_Definition: Silver Run Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: St

          Enumerated_Domain_Value_Definition: Tuscarora Sandstone
        Enumerated_Domain:
          Enumerated_Domain_Value: Stl

          Enumerated_Domain_Value_Definition: Tonoloway Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: Swb

          Enumerated_Domain_Value_Definition: Wills Creek Shale and Bloomsburg Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Ta

          Enumerated_Domain_Value_Definition: Pamunkey Group; Aquia Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Tc

          Enumerated_Domain_Value_Definition: Chesapeake Group; Calvert Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Tch

          Enumerated_Domain_Value_Definition: Chesapeake Group; Choptank Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Tn

          Enumerated_Domain_Value_Definition: Pamunkey Group; Nanjemoy Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Trd

          Enumerated_Domain_Value_Definition: Diabase Sills and Dikes
        Enumerated_Domain:
          Enumerated_Domain_Value: Trg

          Enumerated_Domain_Value_Definition: Gettysburg Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: Trlc-Trqc

          Enumerated_Domain_Value_Definition: New Oxford Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Trno

          Enumerated_Domain_Value_Definition: New Oxford Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Ts

          Enumerated_Domain_Value_Definition: Chesapeake Group; St. Marys Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: uf

          Enumerated_Domain_Value_Definition: Urbana Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: ug

          Enumerated_Domain_Value_Definition: Ultramafic and Gabbroic Rocks
        Enumerated_Domain:
          Enumerated_Domain_Value: um

          Enumerated_Domain_Value_Definition: Ultramafic Rocks
        Enumerated_Domain:
          Enumerated_Domain_Value: vc

          Enumerated_Domain_Value_Definition: Volcanic Complex of Cecil County
        Enumerated_Domain:
          Enumerated_Domain_Value: water

          Enumerated_Domain_Value_Definition: water
        Enumerated_Domain:
          Enumerated_Domain_Value: wbg

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Boulder Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: wf

          Enumerated_Domain_Value_Definition: Chilhowee Group; Weverton Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: wlps

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Lower Pelitic Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: wm

          Enumerated_Domain_Value_Definition: Wakefield Marble
        Enumerated_Domain:
          Enumerated_Domain_Value: wmc

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Metaconglomerate
        Enumerated_Domain:
          Enumerated_Domain_Value: wmg

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Metagraywacke
        Enumerated_Domain:
          Enumerated_Domain_Value: wu

          Enumerated_Domain_Value_Definition: Wissahickon Formation (Undivided)
        Enumerated_Domain:
          Enumerated_Domain_Value: wups

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Upper Pelitic 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: bgb;7
          Enumerated_Domain_Value_Definition: Baltimore Gabbro Complex
        Enumerated_Domain:
          Enumerated_Domain_Value: CAa;2
          Enumerated_Domain_Value_Definition: Chilhowee Group; Antietam Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: CAe;1
          Enumerated_Domain_Value_Definition: Elbrook Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: CAf;2
          Enumerated_Domain_Value_Definition: Frederick Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: CAt;2
          Enumerated_Domain_Value_Definition: Tomstown Dolomite
        Enumerated_Domain:
          Enumerated_Domain_Value: CAwb;1
          Enumerated_Domain_Value_Definition: Waynesboro Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: cc;4
          Enumerated_Domain_Value_Definition: Cardiff Metaconglomerate
        Enumerated_Domain:
          Enumerated_Domain_Value: cm;4
          Enumerated_Domain_Value_Definition: Cockeysville Marble
        Enumerated_Domain:
          Enumerated_Domain_Value: Dch;1
          Enumerated_Domain_Value_Definition: "Chemung" Formation, Parkhead Sandstone, Brallier Formation, and Harrell Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: Dh;1
          Enumerated_Domain_Value_Definition: Hampshire Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Dhn;1
          Enumerated_Domain_Value_Definition: Hamilton Group (including Mahantango Formation and Marcellus Shale), and including Tioga Metabentontite Bed, and Needmore Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: Do;1
          Enumerated_Domain_Value_Definition: Oriskany Group including Ridgeley Sandstone and Shriver Chert
        Enumerated_Domain:
          Enumerated_Domain_Value: DShk;1
          Enumerated_Domain_Value_Definition: Helderberg Formation and Keyser Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: gm;7
          Enumerated_Domain_Value_Definition: Georgetown Mafic Complex
        Enumerated_Domain:
          Enumerated_Domain_Value: hf;2
          Enumerated_Domain_Value_Definition: Chilhowee Group;  Harpers Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: if;3
          Enumerated_Domain_Value_Definition: Ijamsville Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: if-ms;3
          Enumerated_Domain_Value_Definition: Ijamsville Formation and Marburg Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: jg;4
          Enumerated_Domain_Value_Definition: James Run Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: Km;5
          Enumerated_Domain_Value_Definition: Magothy Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Kma;5
          Enumerated_Domain_Value_Definition: Matawan Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Kmo;5
          Enumerated_Domain_Value_Definition: Monmouth Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Kp;5
          Enumerated_Domain_Value_Definition: Potomac Group, including Raritan and Patapsco Formations, Arundel Clay, and Patuxent Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: lf;2

          Enumerated_Domain_Value_Definition: Chilhowee Group; Loudoun Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: lmr;3

          Enumerated_Domain_Value_Definition: Libertytown Metarhyolite
        Enumerated_Domain:
          Enumerated_Domain_Value: Mg;1

          Enumerated_Domain_Value_Definition: Greenbrier Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: mgb;7

          Enumerated_Domain_Value_Definition: Metagabbro and Amphibolite
        Enumerated_Domain:
          Enumerated_Domain_Value: Mmc;1

          Enumerated_Domain_Value_Definition: Mauch Chunk Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Mp;1

          Enumerated_Domain_Value_Definition: Pocono Group, including the Purslane Sandstone and Rockwell Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: ms;3

          Enumerated_Domain_Value_Definition: Marburg Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: OCAc;1

          Enumerated_Domain_Value_Definition: Conococheague Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: OCAg;2

          Enumerated_Domain_Value_Definition: Grove Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: Ocs;1

          Enumerated_Domain_Value_Definition: Chambersburg Limestone and St. Paul Group (including New Market Limestone and Row Park Limestone)
        Enumerated_Domain:
          Enumerated_Domain_Value: Oj;1

          Enumerated_Domain_Value_Definition: Juniata Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Om;1

          Enumerated_Domain_Value_Definition: Martinsburg Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Ops;1

          Enumerated_Domain_Value_Definition: Pinesburg Station Dolomite
        Enumerated_Domain:
          Enumerated_Domain_Value: Orr;1

          Enumerated_Domain_Value_Definition: Rockdale Run Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Os;1

          Enumerated_Domain_Value_Definition: Stonehenge Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: PAap;1

          Enumerated_Domain_Value_Definition: Allegheny Formation and Pottsville Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: PAc;1

          Enumerated_Domain_Value_Definition: Conemaugh Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: PAm;1

          Enumerated_Domain_Value_Definition: Monongahela Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: pbs;4

          Enumerated_Domain_Value_Definition: Peach Bottom Slate
        Enumerated_Domain:
          Enumerated_Domain_Value: pCAbg;4

          Enumerated_Domain_Value_Definition: Baltimore Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: pCAc;2

          Enumerated_Domain_Value_Definition: Catoctin Metabasalt
        Enumerated_Domain:
          Enumerated_Domain_Value: pCAg;2

          Enumerated_Domain_Value_Definition: Granodiorite and Biotite Granite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: pCAmv;2

          Enumerated_Domain_Value_Definition: Metarhyolite and Aasociated Pyroclastic Sediments
        Enumerated_Domain:
          Enumerated_Domain_Value: pCAsr;2

          Enumerated_Domain_Value_Definition: Swift Run Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Pd;1

          Enumerated_Domain_Value_Definition: Dunkard Group
        Enumerated_Domain:
          Enumerated_Domain_Value: PZe;6

          Enumerated_Domain_Value_Definition: Ellicott City Granodiorite
        Enumerated_Domain:
          Enumerated_Domain_Value: PZg;6

          Enumerated_Domain_Value_Definition: Guilford Quartz Monznoite
        Enumerated_Domain:
          Enumerated_Domain_Value: PZgd;6

          Enumerated_Domain_Value_Definition: Quartz Gabbro and Quartz Diorite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: PZgg;6

          Enumerated_Domain_Value_Definition: Gunpowder Granite
        Enumerated_Domain:
          Enumerated_Domain_Value: PZk;6

          Enumerated_Domain_Value_Definition: Kensington Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: PZmg;6

          Enumerated_Domain_Value_Definition: Muscovite Quartz Monzonite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: PZn;6

          Enumerated_Domain_Value_Definition: Norbeck Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: PZp;6

          Enumerated_Domain_Value_Definition: Pegmatite Dikes
        Enumerated_Domain:
          Enumerated_Domain_Value: PZpd;6

          Enumerated_Domain_Value_Definition: Port Deposit Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: PZr;7

          Enumerated_Domain_Value_Definition: Relay Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: PZw;6

          Enumerated_Domain_Value_Definition: Woodstock Quartz Monznoite
        Enumerated_Domain:
          Enumerated_Domain_Value: Qdu;5

          Enumerated_Domain_Value_Definition: Quaternary Deposits Undivided
        Enumerated_Domain:
          Enumerated_Domain_Value: Ql;5

          Enumerated_Domain_Value_Definition: Lowland Deposits
        Enumerated_Domain:
          Enumerated_Domain_Value: QTu;5

          Enumerated_Domain_Value_Definition: Upland Deposits (Western Shore)
        Enumerated_Domain:
          Enumerated_Domain_Value: Qu;5

          Enumerated_Domain_Value_Definition: Upland Deposits (Eastern Shore)
        Enumerated_Domain:
          Enumerated_Domain_Value: Sc;1

          Enumerated_Domain_Value_Definition: Clinton Group, including Rochester Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: scm;3

          Enumerated_Domain_Value_Definition: Sams Creek Metabasalt
        Enumerated_Domain:
          Enumerated_Domain_Value: sf;4

          Enumerated_Domain_Value_Definition: Setters Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Sm;1

          Enumerated_Domain_Value_Definition: McKenzie Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: sq;3

          Enumerated_Domain_Value_Definition: Sugarloaf Mountain Quartzite
        Enumerated_Domain:
          Enumerated_Domain_Value: srl;3

          Enumerated_Domain_Value_Definition: Silver Run Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: St;1

          Enumerated_Domain_Value_Definition: Tuscarora Sandstone
        Enumerated_Domain:
          Enumerated_Domain_Value: Stl;1

          Enumerated_Domain_Value_Definition: Tonoloway Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: Swb;1

          Enumerated_Domain_Value_Definition: Wills Creek Shale and Bloomsburg Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Ta;5

          Enumerated_Domain_Value_Definition: Pamunkey Group; Aquia Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Tc;5

          Enumerated_Domain_Value_Definition: Chesapeake Group; Calvert Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Tch;5

          Enumerated_Domain_Value_Definition: Chesapeake Group; Choptank Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Tn;5

          Enumerated_Domain_Value_Definition: Pamunkey Group; Nanjemoy Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: TRd;2

          Enumerated_Domain_Value_Definition: Diabase Sills and Dikes
        Enumerated_Domain:
          Enumerated_Domain_Value: TRg;2

          Enumerated_Domain_Value_Definition: Gettysburg Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: TRlc-TRqc;2

          Enumerated_Domain_Value_Definition: New Oxford Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: TRno;2

          Enumerated_Domain_Value_Definition: New Oxford Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: Ts;5

          Enumerated_Domain_Value_Definition: Chesapeake Group; St. Marys Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: uf;3

          Enumerated_Domain_Value_Definition: Urbana Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: ug;7

          Enumerated_Domain_Value_Definition: Ultramafic and Gabbroic Rocks
        Enumerated_Domain:
          Enumerated_Domain_Value: um;7

          Enumerated_Domain_Value_Definition: Ultramafic Rocks
        Enumerated_Domain:
          Enumerated_Domain_Value: vc;4

          Enumerated_Domain_Value_Definition: Volcanic Complex of Cecil County
        Enumerated_Domain:
          Enumerated_Domain_Value: water;0

          Enumerated_Domain_Value_Definition: water
        Enumerated_Domain:
          Enumerated_Domain_Value: wbg;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Boulder Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: wf;2

          Enumerated_Domain_Value_Definition: Chilhowee Group; Weverton Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: wlps;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Lower Pelitic Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: wm;3

          Enumerated_Domain_Value_Definition: Wakefield Marble
        Enumerated_Domain:
          Enumerated_Domain_Value: wmc;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Metaconglomerate
        Enumerated_Domain:
          Enumerated_Domain_Value: wmg;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Metagraywacke
        Enumerated_Domain:
          Enumerated_Domain_Value: wu;3

          Enumerated_Domain_Value_Definition: Wissahickon Formation (Undivided)
        Enumerated_Domain:
          Enumerated_Domain_Value: wups;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Upper Pelitic 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: MDbgb;7
          Enumerated_Domain_Value_Definition: Baltimore Gabbro Complex
        Enumerated_Domain:
          Enumerated_Domain_Value: MDCAa;2
          Enumerated_Domain_Value_Definition: Chilhowee Group; Antietam Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDCAe;1
          Enumerated_Domain_Value_Definition: Elbrook Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDCAf;2
          Enumerated_Domain_Value_Definition: Frederick Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDCAt;2
          Enumerated_Domain_Value_Definition: Tomstown Dolomite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDCAwb;1
          Enumerated_Domain_Value_Definition: Waynesboro Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDcc;4
          Enumerated_Domain_Value_Definition: Cardiff Metaconglomerate
        Enumerated_Domain:
          Enumerated_Domain_Value: MDcm;4
          Enumerated_Domain_Value_Definition: Cockeysville Marble
        Enumerated_Domain:
          Enumerated_Domain_Value: MDDch;1
          Enumerated_Domain_Value_Definition: "Chemung" Formation, Parkhead Sandstone, Brallier Formation, and Harrell Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: MDDh;1
          Enumerated_Domain_Value_Definition: Hampshire Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDDhn;1
          Enumerated_Domain_Value_Definition: Hamilton Group (including Mahantango Formation and Marcellus Shale), and including Tioga Metabentontite Bed, and Needmore Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: MDDo;1
          Enumerated_Domain_Value_Definition: Oriskany Group including Ridgeley Sandstone and Shriver Chert
        Enumerated_Domain:
          Enumerated_Domain_Value: MDDShk;1
          Enumerated_Domain_Value_Definition: Helderberg Formation and Keyser Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDgm;7
          Enumerated_Domain_Value_Definition: Georgetown Mafic Complex
        Enumerated_Domain:
          Enumerated_Domain_Value: MDhf;2
          Enumerated_Domain_Value_Definition: Chilhowee Group;  Harpers Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDif;3
          Enumerated_Domain_Value_Definition: Ijamsville Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDif-ms;3
          Enumerated_Domain_Value_Definition: Ijamsville Formation and Marburg Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: MDjg;4
          Enumerated_Domain_Value_Definition: James Run Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: MDKm;5
          Enumerated_Domain_Value_Definition: Magothy Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDKma;5
          Enumerated_Domain_Value_Definition: Matawan Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDKmo;5
          Enumerated_Domain_Value_Definition: Monmouth Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDKp;5
          Enumerated_Domain_Value_Definition: Potomac Group, including Raritan and Patapsco Formations, Arundel Clay, and Patuxent Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDlf;2

          Enumerated_Domain_Value_Definition: Chilhowee Group; Loudoun Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDlmr;3

          Enumerated_Domain_Value_Definition: Libertytown Metarhyolite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDMg;1

          Enumerated_Domain_Value_Definition: Greenbrier Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDmgb;7

          Enumerated_Domain_Value_Definition: Metagabbro and Amphibolite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDMmc;1

          Enumerated_Domain_Value_Definition: Mauch Chunk Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDMp;1

          Enumerated_Domain_Value_Definition: Pocono Group, including the Purslane Sandstone and Rockwell Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDms;3

          Enumerated_Domain_Value_Definition: Marburg Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: MDOCAc;1

          Enumerated_Domain_Value_Definition: Conococheague Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDOCAg;2

          Enumerated_Domain_Value_Definition: Grove Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDOcs;1

          Enumerated_Domain_Value_Definition: Chambersburg Limestone and St. Paul Group (including New Market Limestone and Row Park Limestone)
        Enumerated_Domain:
          Enumerated_Domain_Value: MDOj;1

          Enumerated_Domain_Value_Definition: Juniata Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDOm;1

          Enumerated_Domain_Value_Definition: Martinsburg Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDOps;1

          Enumerated_Domain_Value_Definition: Pinesburg Station Dolomite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDOrr;1

          Enumerated_Domain_Value_Definition: Rockdale Run Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDOs;1

          Enumerated_Domain_Value_Definition: Stonehenge Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPAap;1

          Enumerated_Domain_Value_Definition: Allegheny Formation and Pottsville Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPAc;1

          Enumerated_Domain_Value_Definition: Conemaugh Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPAm;1

          Enumerated_Domain_Value_Definition: Monongahela Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDpbs;4

          Enumerated_Domain_Value_Definition: Peach Bottom Slate
        Enumerated_Domain:
          Enumerated_Domain_Value: MDpCAbg;4

          Enumerated_Domain_Value_Definition: Baltimore Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: MDpCAc;2

          Enumerated_Domain_Value_Definition: Catoctin Metabasalt
        Enumerated_Domain:
          Enumerated_Domain_Value: MDpCAg;2

          Enumerated_Domain_Value_Definition: Granodiorite and Biotite Granite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: MDpCAmv;2

          Enumerated_Domain_Value_Definition: Metarhyolite and Aasociated Pyroclastic Sediments
        Enumerated_Domain:
          Enumerated_Domain_Value: MDpCAsr;2

          Enumerated_Domain_Value_Definition: Swift Run Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPd;1

          Enumerated_Domain_Value_Definition: Dunkard Group
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZe;6

          Enumerated_Domain_Value_Definition: Ellicott City Granodiorite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZg;6

          Enumerated_Domain_Value_Definition: Guilford Quartz Monznoite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZgd;6

          Enumerated_Domain_Value_Definition: Quartz Gabbro and Quartz Diorite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZgg;6

          Enumerated_Domain_Value_Definition: Gunpowder Granite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZk;6

          Enumerated_Domain_Value_Definition: Kensington Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZmg;6

          Enumerated_Domain_Value_Definition: Muscovite Quartz Monzonite Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZn;6

          Enumerated_Domain_Value_Definition: Norbeck Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZp;6

          Enumerated_Domain_Value_Definition: Pegmatite Dikes
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZpd;6

          Enumerated_Domain_Value_Definition: Port Deposit Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZr;7

          Enumerated_Domain_Value_Definition: Relay Quartz Diorite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDPZw;6

          Enumerated_Domain_Value_Definition: Woodstock Quartz Monznoite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDQdu;5

          Enumerated_Domain_Value_Definition: Quaternary Deposits Undivided
        Enumerated_Domain:
          Enumerated_Domain_Value: MDQl;5

          Enumerated_Domain_Value_Definition: Lowland Deposits
        Enumerated_Domain:
          Enumerated_Domain_Value: MDQTu;5

          Enumerated_Domain_Value_Definition: Upland Deposits (Western Shore)
        Enumerated_Domain:
          Enumerated_Domain_Value: MDQu;5

          Enumerated_Domain_Value_Definition: Upland Deposits (Eastern Shore)
        Enumerated_Domain:
          Enumerated_Domain_Value: MDSc;1

          Enumerated_Domain_Value_Definition: Clinton Group, including Rochester Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: MDscm;3

          Enumerated_Domain_Value_Definition: Sams Creek Metabasalt
        Enumerated_Domain:
          Enumerated_Domain_Value: MDsf;4

          Enumerated_Domain_Value_Definition: Setters Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDSm;1

          Enumerated_Domain_Value_Definition: McKenzie Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDsq;3

          Enumerated_Domain_Value_Definition: Sugarloaf Mountain Quartzite
        Enumerated_Domain:
          Enumerated_Domain_Value: MDsrl;3

          Enumerated_Domain_Value_Definition: Silver Run Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDSt;1

          Enumerated_Domain_Value_Definition: Tuscarora Sandstone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDStl;1

          Enumerated_Domain_Value_Definition: Tonoloway Limestone
        Enumerated_Domain:
          Enumerated_Domain_Value: MDSwb;1

          Enumerated_Domain_Value_Definition: Wills Creek Shale and Bloomsburg Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTa;5

          Enumerated_Domain_Value_Definition: Pamunkey Group; Aquia Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTc;5

          Enumerated_Domain_Value_Definition: Chesapeake Group; Calvert Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTch;5

          Enumerated_Domain_Value_Definition: Chesapeake Group; Choptank Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTn;5

          Enumerated_Domain_Value_Definition: Pamunkey Group; Nanjemoy Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTRd;2

          Enumerated_Domain_Value_Definition: Diabase Sills and Dikes
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTRg;2

          Enumerated_Domain_Value_Definition: Gettysburg Shale
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTRlc-TRqc;2

          Enumerated_Domain_Value_Definition: New Oxford Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTRno;2

          Enumerated_Domain_Value_Definition: New Oxford Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDTs;5

          Enumerated_Domain_Value_Definition: Chesapeake Group; St. Marys Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDuf;3

          Enumerated_Domain_Value_Definition: Urbana Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDug;7

          Enumerated_Domain_Value_Definition: Ultramafic and Gabbroic Rocks
        Enumerated_Domain:
          Enumerated_Domain_Value: MDum;7

          Enumerated_Domain_Value_Definition: Ultramafic Rocks
        Enumerated_Domain:
          Enumerated_Domain_Value: MDvc;4

          Enumerated_Domain_Value_Definition: Volcanic Complex of Cecil County
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwater;0

          Enumerated_Domain_Value_Definition: water
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwbg;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Boulder Gneiss
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwf;2

          Enumerated_Domain_Value_Definition: Chilhowee Group; Weverton Formation
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwlps;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Lower Pelitic Schist
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwm;3

          Enumerated_Domain_Value_Definition: Wakefield Marble
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwmc;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Metaconglomerate
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwmg;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Metagraywacke
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwu;3

          Enumerated_Domain_Value_Definition: Wissahickon Formation (Undivided)
        Enumerated_Domain:
          Enumerated_Domain_Value: MDwups;4

          Enumerated_Domain_Value_Definition: Wissahickon Formation; Upper Pelitic 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: MD001

          Enumerated_Domain_Value_Definition: Cleaves, E.T., Edwards, J., Jr., Glaser, J.D., 1968, Geologic Map of Maryland:  Maryland Geological Survey, Baltimore, Maryland,  scale 1:250,000.
        Enumerated_Domain:
          Enumerated_Domain_Value: MD002

          Enumerated_Domain_Value_Definition: Unpublished digital version of the Maryland state geologic map that was digitized by the USGS Water  Resources Office in Towson, MD
        Enumerated_Domain:
          Enumerated_Domain_Value: MD003

          Enumerated_Domain_Value_Definition: Wetherill, G.W., Tilton, G.R., Davis, G.L., Hart, S.R., and Hopson, C.A., 1966, Age measurements in the Maryland Piedmont:  Journal of Geophysical Research, v. 71, p. 2139-2155.
    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: Cambrian
          Enumerated_Domain_Value: Cretaceous
          Enumerated_Domain_Value: Devonian
          Enumerated_Domain_Value: Early Paleozoic (?)
          Enumerated_Domain_Value: Early Paleozoic - Late Precambrian (?)
          Enumerated_Domain_Value: Eocene
          Enumerated_Domain_Value: Late Precambrian
          Enumerated_Domain_Value: Late Precambrian (?)
          Enumerated_Domain_Value: Late Precambrian (?) - Early Paleozoic
          Enumerated_Domain_Value: Late Precambrian - Cambrian
          Enumerated_Domain_Value: Miocene
          Enumerated_Domain_Value: Mississippian
          Enumerated_Domain_Value: Ordovician
          Enumerated_Domain_Value: Ordovician (?)
          Enumerated_Domain_Value: Paleocene
          Enumerated_Domain_Value: Paleozoic
          Enumerated_Domain_Value: Pennsylvanian
          Enumerated_Domain_Value: Permian
          Enumerated_Domain_Value: Precambrian
          Enumerated_Domain_Value: Quaternary
          Enumerated_Domain_Value: Silurian
          Enumerated_Domain_Value: Triassic
          Enumerated_Domain_Value: Upper Cambrian to Lower Ordovician
    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: calcarenite
          Enumerated_Domain_Value: clay
          Enumerated_Domain_Value: claystone
          Enumerated_Domain_Value: conglomerate
          Enumerated_Domain_Value: diabase
          Enumerated_Domain_Value: dolostone (dolomite)
          Enumerated_Domain_Value: gabbro
          Enumerated_Domain_Value: gneiss
          Enumerated_Domain_Value: granitic gneiss
          Enumerated_Domain_Value: granodiorite
          Enumerated_Domain_Value: gravel
          Enumerated_Domain_Value: graywacke
          Enumerated_Domain_Value: greenstone
          Enumerated_Domain_Value: limestone
          Enumerated_Domain_Value: marble
          Enumerated_Domain_Value: meta-basalt
          Enumerated_Domain_Value: meta-conglomerate
          Enumerated_Domain_Value: metasedimentary rock
          Enumerated_Domain_Value: mica schist
          Enumerated_Domain_Value: mudstone
          Enumerated_Domain_Value: orthoquartzite
          Enumerated_Domain_Value: pegmatite
          Enumerated_Domain_Value: phyllite
          Enumerated_Domain_Value: quartz diorite
          Enumerated_Domain_Value: quartz monzonite
          Enumerated_Domain_Value: quartz-feldspar schist
          Enumerated_Domain_Value: quartzite
          Enumerated_Domain_Value: rhyolite
          Enumerated_Domain_Value: sand
          Enumerated_Domain_Value: sandstone
          Enumerated_Domain_Value: schist
          Enumerated_Domain_Value: serpentinite
          Enumerated_Domain_Value: shale
          Enumerated_Domain_Value: siltstone
          Enumerated_Domain_Value: slate
          Enumerated_Domain_Value: tonalite
          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: amphibolite
          Enumerated_Domain_Value: calc-silicate schist
          Enumerated_Domain_Value: calcarenite
          Enumerated_Domain_Value: chert
          Enumerated_Domain_Value: clay or mud
          Enumerated_Domain_Value: conglomerate
          Enumerated_Domain_Value: diorite
          Enumerated_Domain_Value: dolostone (dolomite)
          Enumerated_Domain_Value: dunite
          Enumerated_Domain_Value: gneiss
          Enumerated_Domain_Value: granite
          Enumerated_Domain_Value: granitic gneiss
          Enumerated_Domain_Value: granodiorite
          Enumerated_Domain_Value: granulite
          Enumerated_Domain_Value: gravel
          Enumerated_Domain_Value: greenschist
          Enumerated_Domain_Value: limestone
          Enumerated_Domain_Value: meta-argillite
          Enumerated_Domain_Value: mudstone
          Enumerated_Domain_Value: norite
          Enumerated_Domain_Value: orthoquartzite
          Enumerated_Domain_Value: phyllite
          Enumerated_Domain_Value: quartz diorite
          Enumerated_Domain_Value: quartz monzonite
          Enumerated_Domain_Value: quartzite
          Enumerated_Domain_Value: sand
          Enumerated_Domain_Value: sandstone
          Enumerated_Domain_Value: schist
          Enumerated_Domain_Value: serpentinite
          Enumerated_Domain_Value: shale
          Enumerated_Domain_Value: silt
          Enumerated_Domain_Value: siltstone
          Enumerated_Domain_Value: slate
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: MD_geol.aat
      Entity_Type_Definition: Arc attribute table for Maryland 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: MD001

          Enumerated_Domain_Value_Definition: Unpublished digital version of the Maryland state geologic map that was digitized by the USGS Water  Resources Office in Towson, MD
        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