Archive of sediment physical properties and grain-size data for sediment samples collected offshore of Assateague Island, Maryland and Virginia

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 (http://dx.doi.org/10.5066/F7MW2F60); for more information regarding processing methods refer to USGS Open-File Report 2015Ð1219 (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.

本数据集为美国马里兰州与弗吉尼亚州阿萨蒂格岛（Assateague Island）近岸采集的表层沉积物样品的物理性质与粒度数据档案，用于与飓风桑迪后采集并评估的表层河口及陆上沉积学样品进行对比（Ellis等人，2015，http://doi.org/10.3133/ofr20151219；Smith等人，2015，http://doi.org/10.3133/ofr20151169；Bernier等人，2016，https://pubs.usgs.gov/ds/0999/）。
这批沉积物样品由美国马萨诸塞州伍兹霍尔的美国地质调查局（U.S. Geological Survey, USGS）科研人员搭乘机动船“斯卡利特·伊莎贝拉号”（Motor Vessel (M/V) Scarlett Isabella）采集，作为内陆架制图大型项目的一部分（Pendleton等人，2016，http://doi.org/10.5066/F7MW2F60）。
野外工作完成后，沉积物样品被运送至美国佛罗里达州圣彼得斯堡的USGS海岸与海洋科学中心，按照已有的命名规范进行统一重命名，并开展了容重、烧失量（Loss on Ignition, LOI）与粒度分析测试。
为确保与钦科蒂格湾及阿萨蒂格岛相关数据集的分析方法与输出统计结果保持一致，粒度分样采用库尔特LS200粒度分析仪（Coulter LS200 particle-size analyzer）进行测试。
如需了解样品采集、站位信息及相关数据集的更多详情，请参阅USGS数据集Pendleton等人，2016（http://dx.doi.org/10.5066/F7MW2F60）；若需了解样品处理方法的详细信息，请参阅USGS公开文件报告2015-1219（http://doi.org/10.3133/ofr20151219）。
可下载的数据格式包括Excel电子表格（.xlsx）、逗号分隔值文本文件（.csv）以及标准联邦地理数据委员会（Federal Geographic Data Committee, FGDC）元数据。