Exploration of the continental slope of the Canadian Beaufort Sea has revealed a remarkable coalescence of slide scars with headwalls between 130 and 1100 m water depth (mwd). With increased depth, the scars widen and merge into one gigantic regional slide scar that is more than 100 km wide below ~1100 mwd. To understand the development of these features, five sites were investigated with an Autonomous Underwater Vehicle, which provided 1-m bathymetric grids and Chirp profiles, and surveyed with a Remotely Operated Vehicle. The morphologies are consistent with retrograde failures that occurred on failure planes located between 30 and 75 m below the modern seafloor. At issue is whether the continental slope in this area is preconditioned for failure. While rapid sedimentation during glacial periods, and the presence of shallow gas cannot be ruled out, given the geological environment, it is unclear that they are primary preconditioning factors. Evidence of widespread flushing of the slope with brackish waters, and observed flows of brackish water within slide scars, suggest fluid venting and overpressure may play a role in the development of the extensive slope failures seen along this margin. The impact of pore water salinity changes at the depth of the failure plane on slope stability has not been considered in marine settings previously.

在加拿大波弗特海的大陆坡上进行的勘探发现，滑坡疤痕与水深在130至1100 m（mwd）之间的结疤形成了显着的结合。随着深度的增加，疤痕会扩大并合并为一个巨大的局部滑动疤痕，其宽度在〜1100 mwd以下超过100 km。为了了解这些功能的发展，我们使用自动水下航行器对五个站点进行了调查，该水下航行器提供了1-m的测深网格和Chi曲线，并使用了遥控飞行器进行了勘测。形态与发生在现代海底以下30至75 m之间的破坏平面上的逆行破坏一致。争论的是该地区的大陆坡是否已经为破坏做好了预备条件。在冰川期快速沉积的同时，鉴于地质环境，尚不能排除浅层气体的存在，尚不清楚它们是否是主要的预处理因素。有咸水在斜坡上广泛冲洗的证据，以及在滑坡疤痕中观察到的咸水流动，表明流体的排出和超压可能在沿该边缘看到的广泛的斜坡破坏的发展中起作用。以前在海洋环境中未考虑孔隙水盐度变化在破坏面深度对边坡稳定性的影响。提示在这个边缘看到的广泛的斜坡破坏的发展中，流体的排出和超压可能起作用。以前在海洋环境中未考虑孔隙水盐度变化在破坏面深度对边坡稳定性的影响。提示在这个边缘看到的广泛的斜坡破坏的发展中，流体的排出和超压可能起作用。以前在海洋环境中未考虑孔隙水盐度变化在破坏面深度对边坡稳定性的影响。