WC_tracklines.shp: trackline navigation for EdgeTech SB-512i chirp seismic-reflection data collected in May 2012 by the U.S. Geological Survey within the Washington Canyon, mid-Atlantic margin (Esri polyline shapefile, Geographic, WGS 84)

A large number of high-resolution geophysical surveys between Cape Hatteras and Georges Bank have been conducted by federal, state, and academic institutions since the turn of the century. A major goal of these surveys is providing a continuous view of bathymetry and shallow stratigraphy at the shelf edge in order to assess levels of geological activity during the current sea level highstand. In 2012, chirp seismic-reflection data was collected by the U.S. Geologial Survey aboard the motor vessel Tiki XIV near three United States mid-Atlantic margin submarine canyons. These data can be used to further our understanding of passive continental margin processes during the Holocene, as well as providing valuable information regarding potential submarine geohazards. For more information on the U.S. Geological Survey involvement in this effort, see <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2012-005-FA>.

自世纪之交以来，联邦、州立及学术机构已在哈特拉斯角（Cape Hatteras）与乔治浅滩（Georges Bank）之间开展了大量高分辨率地球物理勘探工作。此类勘探的核心目标之一是获取陆架边缘的连续水深地形与浅层地层数据，以评估当前海平面高位期内的地质活动强度。2012年，美国地质调查局（U.S. Geological Survey）搭乘“蒂基十四号”机动船，在三处美国大西洋中部陆缘海底峡谷附近采集了chirp地震反射数据。该数据可用于深化我们对全新世期间被动大陆边缘演化过程的认知，同时可为潜在海底地质灾害研究提供宝贵资料。如需了解美国地质调查局参与此项工作的更多详情，请访问<http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2012-005-FA>。