PNG formatted images of Knudsen 3202 chirp seismic-reflection profiles collected by the USGS within Buzzards Bay and sand shoals of Vineyard Sound, MA, 2011

These data were collected under a cooperative agreement between the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center (WHCMSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of seafloor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters of coastal Massachusetts, primarily in water depths of 2-30 meters. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (https://woodshole.er.usgs.gov/project-pages/coastal_mass/). The data collected in this study area are located in both Buzzards Bay and Vineyard Sound and are primarily in the shallow water areas around the eastern Elizabeth Islands and Martha's Vineyard, Massachusetts. The data include high resolution bathymetry, acoustic-backscatter intensity, sound velocity in water, seismic-reflection profiles, and navigation data. These data were collected during several cruises between 2007 and 2011 onboard the R/V Rafael using the following equipment: an SEA Ltd SwathPlus interferometric sonar (234 kHz), Klein 3000 dual frequency sidescan sonar, a boomer source and Geometrics 8-channel GeoEel streamer, a Knudsen 3200 subbottom profiling system, and 4 GPS antennae. More information about the cruises conducted as part of the project: Geologic Mapping of the Seafloor Offshore of Massachusetts can be found on the Woods Hole Coastal and Marine Science Center Field Activity webpages: https://cmgds.marine.usgs.gov/fan_info.php?fan=2011-013-FA, https://cmgds.marine.usgs.gov/fan_info.php?fan=2009-068-FA, https://cmgds.marine.usgs.gov/fan_info.php?fan=2007-039-FA, https://cmgds.marine.usgs.gov/fan_info.php?fan=2010-100-FA, and https://cmgds.marine.usgs.gov/fan_info.php?fan=2010-047-FA.

本数据集由马萨诸塞州海岸带管理办公室（Massachusetts Office of Coastal Zone Management, CZM）与美国地质调查局（U.S. Geological Survey, USGS）海岸与海洋地质项目、伍兹霍尔海岸与海洋科学中心（Woods Hole Coastal and Marine Science Center, WHCMSC）合作采集。该项目始于2003年，核心目标为构建区域地质框架信息，以支撑海岸与海洋资源的管理工作。精准的海底地质数据与地图，是保护鱼类栖息地、划定海洋资源范围、评估自然或人类活动引发的环境变化的首要基础步骤。本项目聚焦马萨诸塞州沿岸近岸水域，作业水深主要为2至30米。为该制图合作项目采集的数据，已以一系列美国地质调查局公开文件报告（USGS Open-File Reports）的形式发布，详情见：https://woodshole.er.usgs.gov/project-pages/coastal_mass/。本研究区的数据覆盖布泽尔湾（Buzzards Bay）与葡萄园湾（Vineyard Sound），主要集中于马萨诸塞州伊丽莎白群岛东部及玛莎葡萄园岛周边的浅水区。本数据集涵盖高分辨率水深测量（bathymetry）数据、声学背散射强度数据、水体声速数据、地震反射剖面数据及导航数据。这些数据于2007年至2011年间的多次科考航次中采集，搭载平台为R/V Rafael号科考船，所用设备包括：SEA有限公司SwathPlus干涉式声呐（234 kHz）、Klein 3000双频侧扫声呐、震源系统与Geometrics公司8通道GeoEel拖缆、Knudsen 3200海底浅层剖面系统，以及4台GPS天线。关于本项目中“马萨诸塞州近岸海底地质制图”相关航次的更多信息，可查阅伍兹霍尔海岸与海洋科学中心野外活动网页：https://cmgds.marine.usgs.gov/fan_info.php?fan=2011-013-FA, https://cmgds.marine.usgs.gov/fan_info.php?fan=2009-068-FA, https://cmgds.marine.usgs.gov/fan_info.php?fan=2007-039-FA, https://cmgds.marine.usgs.gov/fan_info.php?fan=2010-100-FA, https://cmgds.marine.usgs.gov/fan_info.php?fan=2010-047-FA。