Identification_Information:
  Citation:
    Citation_Information:
      Originator: David K. Brezinski
      Publication_Date: Unpublished Material
      Title: Mason and Dixon quadrangle geologic map, draft
      Geospatial_Data_Presentation_Form: vector digital data
      Larger_Work_Citation:
        Citation_Information:
          Originator: David K. Brezinski
          Publication_Date: Unpublished Material
          Title: Geologic Map of the Mason and Dixon, MD Quadrangle, MASON2013.1
          Edition: MASON2013.1
          Geospatial_Data_Presentation_Form: vector digital data
          Series_Information:
            Series_Name: Digital Quadrangle Geologic Map Series
          Publication_Information:
            Publication_Place: Baltimore, MD
            Publisher: Maryland Geological Survey
          Online_Linkage: http://www.mgs.md.gov
  Description:
    Abstract:
      This feature dataset is a component of the geologic map of the Mason and Dixon 7.5-minute quadrangle, Washington County, Maryland (1:24,000 scale; 1 inch = 2,000 feet).  Geologic field mapping in the quadrangle was conducted in 2009-2011 by David K. Brezinski.

      This map area is included in an investigation of karst development in the Hagerstown Valley.  The karst investigation was conducted by the Maryland Geological Survey as part of a collaborative effort with the Maryland State Highway Administration.  Components of the digital geologic map were developed in partnership with the STATEMAP component of the National Cooperative Geologic Mapping Program.

      The geologic components were originally drafted onto stable-base material using the corresponding U.S. Geological Survey (USGS) topographic quadrangle map as a base (1:24,000 scale).  The digital geologic map was developed for geographic information systems (GIS) using ESRI's ArcGIS/ArcInfo software.  The geologic map is produced in the Maryland State Plane Coordinate System (Lambert conformal conic projection, NAD83, meters) (1:24000 scale).

      The components of the digital geologic map are divided into separate feature classes for bedrock geology, surficial Quaternary deposits, structural line features (e.g., faults), structural point features (e.g., bedding measurements), and geologic cross-section elements.  Digital base map layers were derived from USGS topographic map for this quadrangle and other sources (see supplemental_information).  Feature class-specific metadata is provided.
    Purpose: The purpose of producing the geologic map using ArcGIS is to allow spatial analyses as part of a geographic information system (GIS).  The geologic data are useful tools in natural resources planning and management.  The GIS format facilitates synergism between geology with other disciplines and derivative work (e.g., mapping of geologic hazards, mineral resources and soils).  A PDF version of the full map layout is provided for printing hard copies and viewing on-screen, particularly for those without access to GIS software.
    Supplemental_Information: The base layers for the geologic map include a ArcGIS feature class (vector data) for hydrography (from the National Hydrography Dataset) and a base map raster image developed from USGS US Topo digital topographic map data.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 2011
        Beginning_Time: unknown
        Ending_Date: 2013
        Ending_Time: unknown
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -77.879118
      East_Bounding_Coordinate: -44.808028
      North_Bounding_Coordinate: 39.958899
      South_Bounding_Coordinate: 35.041297
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: geologic map, cross-section, geology, formations
    Place:
      Place_Keyword_Thesaurus: none
      Place_Keyword: Mason and Dixon quadrangle, Hagerstown Valley, Maryland
  Access_Constraints: None
  Use_Constraints: These data represent the results of data collection/processing for a specific Department of Natural Resources, Maryland Geological Survey activity and indicate general existing conditions.  As such, they are only valid for the intended use, content, time, and accuracy specification.  The user is responsible for the results of any application of the data for other than their intended purpose.  The Department of Natural Resources, Maryland Geological Survey makes no warranty, expressed or implied, as to the use or appropriateness of the data, and there are no warranties of merchantability or fitness for a particular purpose of use.  The Maryland Geological Survey makes no representation to the accuracy or completeness of the data and may not be held liable for human error or defect.  Data are only valid at 1:24,000 scale.  Data should not be used at a scale greater than that.  By using the data, you signify that you have read the use constraints and accept its terms.  Acknowledgement of the Maryland Geological Survey and credit to the originator(s)/author(s) are expected in products derived from this data.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: R.D. Conkwright
        Contact_Organization: Maryland Geological Survey
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2300 St. Paul St.
        City: Baltimore
        State_or_Province: Maryland
        Postal_Code: 21218
        Country: USA
      Contact_Voice_Telephone: 410 337-9461
      Contact_Electronic_Mail_Address: bconkwright@dnr.state.md.us
      Hours_of_Service: 8:30am to 4:30pm EST
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: The geologic map was hand drawn on stable-base film (e.g., Mylar or Herculene) at a scale of 1:24,000 by the principal geologist based on standard geologic mapping techniques, which involves the integration and interpretation of field observations and available subsurface data (e.g., drilling logs, geophysical logs).  The hand-drawn map includes geologic contact lines and coded labels for the geologic map units.  Digital attributes were assigned during the creation of the geology layer in ArcInfo.  Each polygon has a unit label attribute designating the mapped geologic unit provided by the principal geologist or MGS GIS project coordinator/editor.  Additional polygon attributes for the digital files were provided by the MGS GIS project coordinator.  Feature attributes were then verified visually in the ArcInfo attribute tables; attributes linked to map layout components were verified visually on the map both in print and symbolized display on-screen.  Maryland Geological Survey performs quality assurance on the digital vector file by comparison of the digital data files and map to the original films.  Selected attributes that cannot be visually verified on plots or on screen are interactively queried and verified on screen by the GIS project coordinator and GIS specialist(s).
  Logical_Consistency_Report: Map elements were subjected to topologic tests in ArcGIS Desktop (and visually checked) for overshoots, undershoots, duplicate features, polygon closure and other errors by the GIS project coordinator and GIS specialist(s) who created the digital data.and  for errors.  Polylines and polygons were tested to a 0.001 tolerance for overlap or gaps between line features and adjacent geologic formation polygons.  Hard copy prints of the map were reviewed by the MGS geologists for consistency with basic geologic principles and general conformity to mapping standards.
  Completeness_Report:
    Omissions in geologic data would be due primarily to lack of subsurface data or hidden or undiscovered surface units.  The stratigrapher has employed accepted standard procedures and due diligence to ensure the construction of reasonable geologic models.

    Updates may occur as needed or as additional data become available. Check MGS website for version number or contact MGS Publications Office (see Distribution_Information).  Data are complete based on compilation at 1:24,000 scale.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Horizontal accuracy of the digital vector file was tested by comparing proof plots with original mylar(s) of the map prepared by the principal geologist(s) at a scale of 1:24000. The comparison was done visually by MGS geologists and the GIS team.  Some corrections/adjustments to contact locations were made per instruction of the principal geologist, David K. Brezinski, directly in the digital form.  The difference in the positional accuracy between the geologic unit contacts as drawn and digitized and the contacts in the field is difficult to quantify in geologic mapping of this type.  Where a contact between two bedrock units is concealed by a mappable thickness of overlying Quaternary materials (e.g., alluvium, colluvium, residuum, terrace deposits or artificial fill) the location is an estimate indicated by a dotted line on the map (attributed as "concealed" in the arc attribute table in coverage).  Where a bedrock contact is not concealed by mappable Quaternary deposits, the certainty of a contact's location may vary because many bedrock contacts are not exposed everywhere (they are often covered by soils and/or vegetation in places).  In these situations the location certainty/accuracy of geologic contacts has been designated by the principal geologist as accurate (symbolized by a solid line), approximate (a long dash pattern), or inferred (a short dash pattern).
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: unknown
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Publication_Date: Unpublished Material
      Source_Scale_Denominator: 24000
      Type_of_Source_Media: stable-base material
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 2011
            Beginning_Time: unknown
            Ending_Date: 2013
            Ending_Time: unknown
        Source_Currentness_Reference: ground condition
      Source_Citation_Abbreviation: David K, Brezinski, unpublished material
      Source_Contribution: Hand drawn ink-on mylar developed from field data overlaid on USGS topographic map (1:24000)
    Process_Step:
      Process_Description: Geologic map for target area was developed.
      Source_Used_Citation_Abbreviation: D.K. Brezinski
      Process_Date: Unknown
    Process_Step:
      Process_Description: Cross section hand drawn, ink-on-base-stable-Mylar.  Cross section structure is based on interpretation of surface structures and, where available, subsurface data.
      Source_Used_Citation_Abbreviation: D.K. Brezinski
      Process_Date: Unknown
    Process_Step:
      Process_Description: Base-stable Mylar cross section artwork was scanned at 300 dpi and saved to TIF format image.
      Process_Date: Unknown
    Process_Step:
      Process_Description: Scanned image imported into ArcGIS 9.3.1 and georeferenced to base map.  Beginning and end points of cross section surface line, and the lower left and lower right corners of the section are used as georeference points on the scanned section.
      Process_Date: Unknown
    Process_Step:
      Process_Description: Geologic features on scanned image were digitized on-screen at a scale of 1:5000 or greater.
      Process_Date: Unknown
    Process_Step:
      Process_Description: Geologic  feature class topologies was built in ArcGIS Catalogue to identify topologic errors between adjacent polygons, and with contacts and faults.  Any errors were corrected.
      Process_Date: Unknown
  Cloud_Cover: n/a
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 178
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 2
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: String
      Point_and_Vector_Object_Count: 146
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: String
      Point_and_Vector_Object_Count: 61
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 59
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 55
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 56
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 178
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 60
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 55
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 395
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 2
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 178
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 25
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 290
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 15
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 25
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: String
      Point_and_Vector_Object_Count: 234
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 546
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 52
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 15
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 0
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 33
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: G-polygon
      Point_and_Vector_Object_Count: 25
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: Entity point
      Point_and_Vector_Object_Count: 290
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: State Plane Coordinate System
        State_Plane_Coordinate_System:
          SPCS_Zone_Identifier: 1900
          Lambert_Conformal_Conic:
            Standard_Parallel: 38.300000
            Standard_Parallel: 39.450000
            Longitude_of_Central_Meridian: -77.000000
            Latitude_of_Projection_Origin: 37.666667
            False_Easting: 400000.000000
            False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.000100
          Ordinate_Resolution: 0.000100
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: Geodetic Reference System 80
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257222
  Vertical_Coordinate_System_Definition:
    Altitude_System_Definition:
      Altitude_Resolution: 0.000010
      Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Bedding
      Entity_Type_Definition: Bedding feature class
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Cleavage
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Contacts
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Faults
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: MapUnitPolys
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: GSControlPoints
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: SurfaceGeologyPolys
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Faults_Rep1Anno
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: BeddingAnno
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Bedrock_GeologyAnno
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Surface_GeologyAnno
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: KarstFeatures
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: CleavageAnno
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: BeddingAnno2
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Anno_5_56
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Anno_1_58
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Anno_13_59
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Anno_34_60
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Anno_2_72
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Anno_1_73
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: R.D. Conkwright
        Contact_Organization: Maryland Geological Survey
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2300 St. Paul St.
        City: Baltimore
        State_or_Province: MD
        Postal_Code: 21218
        Country: USA
      Contact_Voice_Telephone: 410 337-9461
      Contact_Electronic_Mail_Address: bconkwright@dnr.state.md.us
      Hours_of_Service: 8:30am to 4:30pm EST
  Resource_Description: Downloadable Data
  Distribution_Liability:
    Where data have been translated from one format to another or initially developed from maps or other sources, reasonable effort has been made to preserve the data quality as originally developed, however, no warranty expressed or implied is made by the Maryland Geological Survey as to the completeness or accuracy of these data and related materials.
        Although all data and software published have been used by the Maryland Geological Survey of the Maryland Department of Natural Resources, no warranty, expressed or implied, is made by that agency as to the accuracy of the data and the related materials and/or the functioning software.  The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the Maryland Geological Survey (or Department of Natural Resources) in the use of these data, software or related materials.
        The Department of Natural Resources shall not be subject to liability for human error, error due to software conversion, defect, or failure of machines, or any material used in the connection with the machines, including tapes, disks, CD-ROMs or DVD-ROMs and energy.  The Maryland Department of Natural Resources shall not be liable for any lost profits, consequential damages, or claims against the Department of Natural Resources by third parties.  The liability of the Department of Natural Resources for damage, regardless of the form of the action, shall not exceed any distribution fees that may have been paid in obtaining spatial data.
  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: ArcGIS geodatabase
        Format_Version_Number: ArcGIS 9.3.1
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name: http://www.mgs.md.gov
          Access_Instructions: Search website for file location
    Fees: none
    Ordering_Instructions: Internet download
    Turnaround: n/a
  Custom_Order_Process:
    Contact the Publications Office
    Maryland Geological Survey
    410 554-5505
    publications@mgs.md.gov
  Technical_Prerequisites: ArcGIS Desktop 9.3.1
Metadata_Reference_Information:
  Metadata_Date: 20130808
  Metadata_Future_Review_Date: as needed
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Maryland Geological Survey
        Contact_Person: R.D. Conkwright
      Contact_Position: Geologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2300 St. Paul St.
        City: Baltimore
        State_or_Province: Maryland
        Postal_Code: 21218
        Country: USA
      Contact_Voice_Telephone: 410 337-9461
      Contact_Electronic_Mail_Address: bconkwright@dnr.state.md.us
      Hours_of_Service: 8:30am to 4:30pm, EST
      Contact_Instructions: http://www.mgs.md.gov
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
  Metadata_Access_Constraints: None
  Metadata_Use_Constraints: None
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile
