Metadata: Identification_Information: Citation: Citation_Information: Originator: Alisha M. Ellis Originator: Cathryn J. Wheaton Originator: Christopher G. Smith Publication_Date: 20170630 Title: Archive of sediment physical properties and grain-size data for sediment samples collected offshore of Assateague Island, Maryland and Virginia Geospatial_Data_Presentation_Form: Tabular digital data Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: doi:10.5066/F7HX19WB Online_Linkage: https://doi.org/10.5066/F7HX19WB Description: Abstract: This data release serves as an archive of sediment physical properties and grain-size data for surficial samples collected offshore of Assateague Island, Maryland and Virginia, for comparison with surficial estuarine and subaerial sedimentological samples collected and assessed following Hurricane Sandy (Ellis and others, 2015 (http://doi.org/10.3133/ofr20151219); Smith and others, 2015 (http://doi.org/10.3133/ofr20151169); Bernier and others, 2016 (https://pubs.usgs.gov/ds/0999/)). The sediment samples were collected by scientists from the U.S. Geological Survey (USGS) office in Woods Hole, Massachusetts while aboard the motor vessel (M/V) Scarlett Isabella as part of a larger effort to map the inner continental shelf (Pendleton and others, 2016 (http://doi.org/10.5066/F7MW2F60)). Following field work, the sediment samples were shipped to the USGS Coastal and Marine Science Center in St. Petersburg, Florida, where they were renamed for consistency with a previously existing naming scheme and processed for bulk density, loss on ignition (LOI), and grain-size. The grain-size subsamples were processed on a Coulter LS200 particle-size analyzer for consistency regarding methods and output statistics with related data sets from Chincoteague Bay and Assateague Island. For more information regarding sample collection and site information or the related data sets, refer to USGS data release Pendleton and others, 2016 (https://doi.org/10.5066/F7MW2F60); for more information regarding processing methods refer to USGS Open-File Report 2015–1219 (http://doi.org/10.3133/ofr20151219). Downloadable data are available as Excel spreadsheets (.xlsx), comma-separated values text files (.csv), and formal Federal Geographic Data Committee (FGDC) metadata. Purpose: The file 14CTB-OffshoreG_Compiled_Grain-Size_Summary_Gradistat.zip includes spreadsheets summarizing particle size analysis results for each surface sample collected during the July 2014 sampling trip. Supplemental_Information: The unedited output files with statistics for each sample run along with averaged statistics for each sample generated by the USGS Average and Check Standard Deviation macro are available upon request. The averaged results for the subset of statistical parameters that apply to these data are summarized in two spreadsheets, which can be downloaded from https://doi.org/10.5066/F7HX19WB/14CTB-OffshoreG_Compiled_Grain-Size_Summary_Gradistat.zip. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20140722 Ending_Date: 20140725 Currentness_Reference: Ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.436266 East_Bounding_Coordinate: -75.835042 North_Bounding_Coordinate: 38.13240 South_Bounding_Coordinate: 37.700491 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:a4e627e6-5823-4880-99ac-73c759f2c354 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: geoscientific information Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: unconsolidated deposits Theme_Keyword: geology Theme_Keyword: geomorphology Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Assateague Island Theme_Keyword: sediment Theme_Keyword: surface Theme_Keyword: grain size Theme_Keyword: GRADISTAT Theme_Keyword: mean Theme_Keyword: sorting Theme_Keyword: skewness Theme_Keyword: kurtosis Theme_Keyword: Folk and Ward Theme_Keyword: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Virginia Theme_Keyword: Maryland Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Assateague Island Place_Keyword: Maryland Place_Keyword: Virginia Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: sediment Stratum_Keyword: surface Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: July 2014 Access_Constraints: None Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests that it be acknowledged as the originator of this dataset in any future products or research derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Alisha M. Ellis Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: aellis@usgs.gov Data_Set_Credit: U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center Native_Data_Set_Environment: Apple OS X El Capitan Version 10.11.6; Microsoft Excel for Mac 2016 Version 15.22 Cross_Reference: Citation_Information: Originator: Blott, S.J. and Pye, K. Publication_Date: 2001 Title: Gradistat: A grain size distribution and statistics package for the analysis of unconsolidated sediments Edition: Version 8.0 Series_Information: Series_Name: Earth Surface Processes and Landforms Issue_Identification: Volume 26 Other_Citation_Details: Pages 1237-1248 Online_Linkage: http://www.kpal.co.uk/gradistat.html Cross_Reference: Citation_Information: Originator: Ellis, A.M., Marot, M.E., Wheaton, C.J., Bernier, J.C., and Smith, C.G. Publication_Date: 2015 Title: A seasonal comparison of surface sediment characteristics in Chincoteague Bay, Maryland and Virginia, USA Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 2015-1219 Online_Linkage: https://doi.org/10.3133/ofr20151219 Cross_Reference: Citation_Information: Originator: Smith, C.G., Marot, M.E., Ellis, A.M., Wheaton, C.J., Bernier, J.C., and Adams, C.S. Publication_Date: 2015 Title: Sedimentological and radiochemical characteristics of marsh deposits from Assateague Island and the adjacent vicinity, Maryland and Virginia, following Hurricane Sandy Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 2015-1169 Online_Linkage: https://doi.org/10.3133/ofr20151169 Cross_Reference: Citation_Information: Originator: Bernier, J.C., Zaremba, N.J., Wheaton, C.J., Ellis, A.M., Marot, M.E., and Smith, C.G. Publication_Date: 2016 Title: Sedimentologic characteristics of recent washover deposits from Assateague Island, Maryland Series_Information: Series_Name: U.S. Geological Survey Data Series Issue_Identification: ds999 Online_Linkage: https://doi.org/10.3133/ds999 Cross_Reference: Citation_Information: Originator: Pendleton, E.A., Ackerman, S.D., Baldwin, W.E., Danforth, W.W., Foster, D.S., Thieler, E.R., and Brothers, L.L. Publication_Date: 2016 Title: High-resolution geophysical data collected along the Delmarva Peninsula 2014, U.S. Geological Survey Field Activity 2014-002-FA Series_Information: Series_Name: U.S. Geological Survey Data Release Issue_Identification: F7MW2F60 Online_Linkage: https://doi.org/10.5066/F7MW2F60 Cross_Reference: Citation_Information: Originator: Blackwood, D., Parolski, K., and Valentine, P. Publication_Date: 2000 Title: Seabed observation and sampling system Series_Information: Series_Name: U.S. Geological Survey Fact Sheet Issue_Identification: FS-142-00 Online_Linkage: https://pubs.usgs.gov/fs/fs142-00/fs142-00.pdf Cross_Reference: Citation_Information: Originator: Folk, R.L. and Ward, W.C. Publication_Date: 1957 Title: Brazos River bar: A study in the significance of grain size parameters Series_Information: Series_Name: SEPM Journal of Sedimentary Petrology Issue_Identification: Volume 27 Other_Citation_Details: Pages 3-26 Online_Linkage: https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D Cross_Reference: Citation_Information: Originator: Friedman, G.M., and Sanders, J.E. Publication_Date: 1978 Title: Principles of Sedimentology Other_Citation_Details: 792 Pages Cross_Reference: Citation_Information: Originator: Krumbein, W.C. Publication_Date: 1934 Title: Size frequency distributions of sediments Series_Information: Series_Name: SEPM Journal of Sedimentary Petrology Issue_Identification: Volume 4 Other_Citation_Details: Pages 65-77 Online_Linkage: https://doi.org/10.1306/d4268eb9-2b26-11d7-8648000102c1865d Cross_Reference: Citation_Information: Originator: Wentworth, C.K. Publication_Date: 1922 Title: A scale of grade and class terms for clastic sediments Series_Information: Series_Name: Journal of Geology Issue_Identification: Volume 30 Other_Citation_Details: Pages 377-392 Online_Linkage: https://doi.org/10.1086/622910 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The grain size data presented in the run statistics spreadsheets (https://doi.org/10.5066/F7HX19WB/14CTB-OffshoreG_Compiled_Grain-Size_Summary_Gradistat.zip) represent the sample averages for a subset of the statistical parameters calculated by GRADISTAT. The number of runs included in the averaged results are also reported, and the standard deviation of the averaged results are reported for most parameters. Logical_Consistency_Report: The complete grain size dataset including all GRADISTAT parameters, results of individual sample runs, and standard deviations for all sample averages are available upon request. Sample runs in the output files for which the mean Folk and Ward grain size varied from the set average by more than 1.5 standard deviations are highlighted in yellow and were not included in final averaged results. Completeness_Report: This is a complete grain size dataset that includes results for 19 surface sediment samples collected offshore of Assateague Island, Virginia and Maryland. Lineage: Process_Step: Process_Description: 19 surface sediment samples were collected offshore of Assateague Island using a VanVeen sediment sampler attached to a SEABOSS (Blackwood et al., 2000). Samples were transported to the USGS St. Petersburg Coastal and Marine Science Center (SPCMSC) for analysis. Prior to particle size analysis, sediment samples which appeared to consist of greater than 5 percent organic material had the organic matter chemically removed from the samples using approximately 8 mL of 30 percent hydrogen peroxide (H2O2) in 50 milliliter beakers overnight. The H2O2 was then evaporated through slow heating on a hot plate, and the sediment was washed and centrifuged twice with deionized water. Samples which appeared to consist of less than 5 percent organic material were dried at 60 degrees C. To prevent shell fragments from damaging the Coulter LS200, particles greater than 1 mm in diameter were separated from all samples prior to analysis with a number 18 (1000 µm) U.S. standard sieve, which meets the American Society for Testing and Materials (ASTM) E11 standard specifications for determining particle size with woven-wire test sieves. The samples were washed through the sieve with filtered municipal water and a few milliliters of sodium hexametaphosphate solution to act as a deflocculant. The sediment slurry was sonicated with a wand sonicator for 30–60 seconds before being introduced into the Coulter LS200 to break down aggregated particles. Two subsamples from each sample were processed through the Coulter LS200 with a minimum of four runs apiece. The Coulter LS200 measures the particle-size distribution of each sample by passing sediment suspended in solution between two narrow panes of glass in front of a laser. The particles scatter light into characteristic refraction patterns that are measured by an array of photodetectors as intensity per unit area and recorded as relative volume for 92 size-classification channels, or bins. The size-classification boundaries for each bin were based on the ATSM E11 standard specification for wire cloth and sieves for testing purposes. Process_Date: 2014 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Alisha M. Ellis Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: aellis@usgs.gov Process_Step: Process_Description: The raw grain-size data were then run through the free software program, GRADISTAT version 8, (Blott and Pye, 2001; kpal.co.uk/gradistat),which calculates the mean, median, sorting, skewness, and kurtosis of each sample geometrically in metric units and logarithmically in phi units (Krumbein, 1934) using the Folk and Ward (1957) method. GRADISTAT also calculates the fraction of sediment from each sample by size category (for example, clay, coarse silt, fine sand) based on Friedman and Saunders (1978), a modified Wentworth (1922) size scale. A macro function in Microsoft Excel, developed by the USGS SPCMSC, was applied to the data to calculate the average and standard deviation for each sample set (8 runs per sample), and highlight runs that varied from the set average by more than ± 1.5 standard deviations. Excessive deviations from the mean are likely the result of equipment error or extraneous organic material in the sample and are not considered representative of the sample. The highlighted runs were removed from the results, and the sample average was recalculated using the remaining runs. The raw, unaltered, individual run statistics and class size distribution as produced by GRADISTAT version 8 (Blott and Pye, 2001), as well as the averaged run statistics and class size distributions, are available upon request. The averaged results for all samples, including the number of runs included and the standard deviation of the averaged results were summarized in an Excel workbook. Process_Date: 2014 Source_Produced_Citation_Abbreviation: 14CTB-OffshoreG_Compiled_Grain-Size_Summary_Gradistat.zip Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Alisha M. Ellis Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: aellis@usgs.gov Process_Step: Process_Description: Added keywords section with USGS persistent identifier as theme keyword. Process_Date: 20201013 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: VeeAnn A. Cross Contact_Position: Marine Geologist Contact_Address: Address_Type: Mailing and Physical Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2251 Contact_Facsimile_Telephone: 508-457-2310 Contact_Electronic_Mail_Address: vatnipp@usgs.gov Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The detailed attribute descriptions for the statistics summary workbooks are provided in the included data dictionary (https://doi.org/10.5066/F7HX19WB/Grain-Size_Data_Dictionary.pdf). These metadata are not complete without this file. Entity_and_Attribute_Detail_Citation: Data Dictionary for Grain Size Data Tables, in: Ellis and others, Detailed sediment grain-size statistics for the sediments offshore of Assateague Island, Maryland and Virginia: U.S. Geological Survey Data Release, https://doi.org/10.5066/F7HX19WB. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey St. Petersburg Coastal and Marine Science Center Contact_Person: Alisha M. Ellis Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: aellis@usgs.gov Resource_Description: 14CTB-OffshoreG_Compiled_Grain-Size_Summary_Gradistat.zip Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Compressed (.zip) archive Format_Version_Number: 2016 Format_Specification: .xlsx File_Decompression_Technique: Unzip Transfer_Size: 0.026 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://coastal.er.usgs.gov/data-release/doi-F7HX19WB/data/14CTB-OffshoreG_Compiled_Grain-Size_Summary_Gradistat.zip Fees: None, if obtained online Technical_Prerequisites: The workbook included in this .zip file was created for use with Microsoft Excel 2016. They may also be viewed with the Microsoft Excel viewer or by downloading a Microsoft Compatibility Pack to view with older versions of Microsoft Excel. Metadata_Reference_Information: Metadata_Date: 20201013 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Alisha M. Ellis Contact_Position: Geologist Contact_Address: Address_Type: Mailing and physical Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 502-8000 Contact_Electronic_Mail_Address: aellis@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: None Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None