Maryland Geological Survey: Offshore Sand Resources in Northern Maryland Shoal Fields (Conkwright, et al, 2000)

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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 ¼k (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:

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Calendar_Date: 2000

Currentness_Reference: publication date

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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

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Image maps showing extent and distribution of this data layer coverage

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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>

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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

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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

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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

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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

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