Location of Sea-Floor Photographs Acquired During U.S. Geological Survey (USGS) Cruise 2012-002-FA in Block Island Sound (2012-002_023BOTPHOTOS shapefile, Geographic)

The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA), is producing detailed geologic maps of the coastal sea floor. Bathymetric and sidescan-sonar data, originally collected by NOAA for charting purposes, provide a fundamental framework for research and management activities along this part of Block Island Sound, show the composition and terrain of the seabed, and provide information on sediment transport and benthic habitat. During June 2012, bottom photographs and surficial sediment data were acquired as part of a ground-truth reconnaissance survey of this area. Interpretations were derived from the multibeam-echosounder, sidescan-sonar, sedimentary, and photographic data collected in Block Island Sound. For more information on the ground-truth survey see <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2012-002-FA>.美国地质调查局（U.S. Geological Survey, 以下简称USGS）与美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, 以下简称NOAA）合作，正编制布洛克岛海峡（Block Island Sound）沿岸海底的详细地质图。最初由NOAA为海图绘制工作采集的水深测量（Bathymetric）与侧扫声呐（sidescan-sonar）数据，为布洛克岛海峡该区域的科研与管理活动提供了基础支撑框架，可反映海底的物质组成与地形特征，同时可为沉积物运移及底栖生境（benthic habitat）研究提供关键信息。2012年6月，研究团队针对该区域开展地面验证（ground-truth）踏勘调查，采集了海底影像照片与表层沉积物数据。本数据集的解译成果均基于在布洛克岛海峡海域采集的多波束测深仪（multibeam-echosounder）数据、侧扫声呐数据、沉积物数据与摄影影像数据生成。如需了解本次地面验证调查的更多详情，请访问<http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2012-002-FA>。