MOSAIC2 - Composite sidescan-sonar mosaic collected by the U.S. Geological Survey offshore of the Chandeleur Islands, LA, 2006 (UTM Zone 16N GeoTIFF)

In 2006 and 2007, the U.S. Geological Survey, in partnership with Louisiana Department of Natural Resources and the University of New Orleans, conducted geologic mapping to characterize the sea floor and shallow subsurface stratigraphy offshore of the Chandeleur Islands in Eastern Louisiana. The mapping was carried out during two cruises on the R/V Acadiana. Data were acquired with the following equipment: an SEA Ltd SwathPlus interferometric sonar (234 kHz), Klein 3000 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 geologic maps and geophysical interpretations that can be utilized to investigate the impact of Hurricane Katrina in 2005 and to identify sand resources within the region.

2006年至2007年，美国地质调查局（U.S. Geological Survey）与路易斯安那州自然资源部（Louisiana Department of Natural Resources）及新奥尔良大学（University of New Orleans）合作，针对路易斯安那州东部尚德勒尔群岛（Chandeleur Islands）周边近海的海底及浅地下地层开展地质填图工作，以系统刻画其特征。本次填图作业依托“R/V阿卡迪亚号”（R/V Acadiana）完成了两次航次。数据采集使用了以下设备：SEA有限公司（SEA Ltd）的SwathPlus干涉声呐（234 kHz）、Klein 3000双频侧扫声呐，以及Edgetech 512i型啁啾式海底剖面仪。本次填图工作的长期目标为编制高质量地质图件并开展地球物理解译，以此探究2005年卡特里娜飓风（Hurricane Katrina）对该区域造成的影响，并探明区域内的砂资源。