Identification_Information: Citation: Citation_Information: Publication_Date: 2000 Title: Maryland Geological Survey: Offshore Sand Resources in Northern Maryland Shoal Fields (Conkwright, et al, 2000) Geospatial_Data_Presentation_Form: tabular digital data Online_Linkage: Description: Abstract: Vibracoring was contracted to Alpine Seismic Surveys, Inc. of Norwood, NJ. Alpine provide the 27-meter R/V Atlantic Twin for the work. An Alpine 271 B Pneumatic vibracore drill rig was outfitted to take 6 meter by 9.2 centimeter diameter cellulose butyrate-lined vibracores. Textural parameters were analyzed by Maryland Geological Survey. Textural analysis procedure is detailed in Kerhin and others (1988). Sediment samples were first treated with 10% solution of hydrochloric acid to remove carbonate material such as shells and then treated with a 6% or 15% solution of hydrogen peroxide to remove organic material. The samples were then passed through a 63-micron mesh sieve, followed by a 2-mm sieve, separating sands from mud and gravel fractions. Mud fractions were analyzed using a pipette technique to determine silt and clay contents. Weights of the sand, silt and clay fractions were converted to weight percentages. Sediments were categorized according to Shepard's (1954) classification based on percent sand, silt and clay components. Sand fractions were analyzed using a rapid sediment analyzer (RSA) (Halka and others, 1980). The RSA technique measured cumulative weight in Ľk (phi) intervals. Data were normalized to a 100% sand distribution, and the method of Folk and Ward (1957) was used to report graphic mean and sorting. When mud contents were less than 5%, grain size analyses were conducted only on the sand fraction. Pipette analyses were used to determine silt and clay content in samples with greater than 5% mud. Purpose: Offshore sand resource assessment Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -74.959340 East_Bounding_Coordinate: -74.902040 North_Bounding_Coordinate: 38.480560 South_Bounding_Coordinate: 38.365080 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: analyses Theme_Keyword: descriptions Theme_Keyword: grain size Theme_Keyword: lithology Theme_Keyword: seabed Theme_Keyword: seafloor Theme_Keyword: sediment data Theme_Keyword: vibracore Place: Place_Keyword_Thesaurus: General Place_Keyword: Atlantic coast Place_Keyword: East Coast Place_Keyword: Maryland Shoal Fields Place_Keyword: Maryland Place_Keyword: Northern Maryland Place_Keyword: United States Access_Constraints: None. Use_Constraints: None. Browse_Graphic: Browse_Graphic_File_Name: MGS00_2.jpg Browse_Graphic_File_Description: Image maps showing extent and distribution of this data layer coverage Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 8.3.0.800 Cross_Reference: Citation_Information: Originator: Robert D. Conkwright Originator: Christopher P. Williams Originator: Lizet B. Christiansen Publication_Date: March 2000 Title: Offshore Sand Resources in Northern Maryland Shoal Fields Series_Information: Series_Name: COASTAL AND ESTUARINE GEOLOGY FILE REPORT Issue_Identification: NO. 00-2 Publication_Information: Publisher: Maryland Geological Survey Other_Citation_Details: Submitted to Roger Amato, Contracting Officer's Technical Representative, U.S. Department of the Interior, Minerals Management Service in partial fulfillment of Contract #14-35-0001-30769 Online_Linkage: http://www.mgs.md.gov/coastal/pub/OF00_2.pdf Online_Linkage: http://www.mgs.md.gov/coastal/pub/FR00_2a.html Data_Quality_Information: Lineage: Process_Step: Process_Description: Data was downloaded from the online publication. Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chris Jenkins Contact_Organization: Institute of Arctic & Alpine Research (INSTAAR) University of Colorado at Boulder Contact_Address: Address_Type: mailing and physical address Address: 1560 30th Street Address: Campus Box 450 City: Boulder State_or_Province: CO Postal_Code: 80309-0450 Country: USA Contact_Voice_Telephone: (303) 492-6387 Contact_Facsimile_Telephone: (303) 492-6388 Contact_Electronic_Mail_Address: chris.jenkins@colorado.edu Process_Step: Process_Description: Digital data were checked, formatted to dbSEABED input format, then processed using dbSEABED software to produce a range of output formats. The processing contained quality checking that may have declined to pass faulty or suspect data to outputs. Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chris Jenkins Contact_Organization: Institute of Arctic & Alpine Research (INSTAAR) University of Colorado at Boulder Contact_Address: Address_Type: mailing and physical address Address: 1560 30th Street Address: Campus Box 450 City: Boulder State_or_Province: CO Postal_Code: 80309-0450 Country: USA Contact_Voice_Telephone: (303) 492-6387 Contact_Facsimile_Telephone: (303) 492-6388 Contact_Electronic_Mail_Address: chris.jenkins@colorado.edu 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: 504 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000000 Longitude_Resolution: 0.000000 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: MGS00_2 Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: LATITUDE Attribute: Attribute_Label: LONGITUDE Attribute: Attribute_Label: SITENAME Attribute: Attribute_Label: DATASETKEY Overview_Description: Entity_and_Attribute_Overview: The following fields were entered into usSEABED: SFS data: Core ID:Latitude1:Longitude 1:Northing2:Easting2:Depth3:Sample :Interval:Interval:Sample TXG data: Mean:Sorting:Skewness:Kurtosis LTH data: SHEPARD'S CLASS TXR data: Top(cm):Bottom(cm):Depth (altitude): Gravel%:Sand%:Silt%:Clay%:Mud% Distribution_Information: Resource_Description: Downloadable Data Distribution_Liability: Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Transfer_Size: 0.072 Metadata_Reference_Information: Metadata_Date: 20050525 Metadata_Review_Date: 20050504 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jamey Reid Contact_Organization: U.S. Geological Survey Contact_Position: IT Specialist (Data Management) Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2204 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: jreid@usgs.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