10cct02_MOSAIC_GN.tif - Composite sidescan-sonar mosaic collected by the U.S. Geological Survey in St. Petersburg, FL offshore of the Gulf Islands, MS, 2010 (UTM Zone 16N GeoTIFF)

In 2010, the U.S. Geological Survey in Woods Hole, MA and St. Petersburg, FL, in partnership with the U.S. Army Corps of Engineers, Mobile District conducted geologic mapping to characterize the seafloor and shallow subsurface stratigraphy offshore of the Gulf Islands of Mississippi. The mapping was carried out during two cruises in March, 2010 on the R/V Tommy Munro of Biloxi, MS. Data were acquired with the following equipment: an SEA Ltd SwathPlus interferometric sonar (both 234 kHz and 468 kHz systems), a Klein 3000 and a Klein 3900 dual frequency sidescan-sonar, and an Edgetech 512i chirp subbottom profiling system. The long-term goal of this mapping effort is to produce high-quality, high-resolution geologic maps and geophysical interpretations that can be utilized to identify sand resources within the region and better understand the Holocene evolution and anticipate future changes in this coastal system. More information on the field work can be accessed from the Woods Hole Coastal and Marine Science Center Field Activity webpage https://cmgds.marine.usgs.gov/fan_info.php?fan=2010-012-FA or the St. Petersburg Coastal and Marine Geology InfoBank https://walrus.wr.usgs.gov/infobank/m/m210gm/html/m-2-10-gm.meta.html.

2010年，美国地质调查局（U.S. Geological Survey）马萨诸塞州伍兹霍尔分部与佛罗里达州圣彼得斯堡分部，联合美国陆军工程兵团莫比尔分区，针对密西西比湾群岛近岸海域开展海底与浅层地下地层地质填图工作，以探明该区域的海底及浅层地下地层特征。本次填图分两次航次于2010年3月在密西西比州比洛克西市的R/V Tommy Munro号研究船上完成。本次作业采集数据所用设备包括：SEA有限公司生产的SwathPlus干涉声呐（涵盖234 kHz与468 kHz两套系统）、Klein 3000及Klein 3900双频侧扫声呐，以及Edgetech 512i型啁啾海底剖面仪。本次填图工作的长期目标为产出高质量、高分辨率的地质图件与地球物理解译成果，用于识别该区域内的砂矿资源，深化对该海岸系统全新世演化过程的认知，并预测其未来变化。有关本次野外作业的更多详细信息，可通过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=2010-012-FA）或圣彼得斯堡海岸与海洋地质信息库（https://walrus.wr.usgs.gov/infobank/m/m210gm/html/m-2-10-gm.meta.html）查询获取。