Using the Massive Messinian Erosion Event as a Natural Experiment to Study the Growth of a Shelfbreak Margin

大约6万年前，在地中海的墨西尼亚干旱化期间，裸露的边缘被严重侵蚀到比现在海平面低约2公里的新基准面，导致对现有陆架平台的大规模陆上侵蚀，将许多边缘转变为向盆地倾斜的斜坡。在随后的洪水中，这些沉积物被上新世沉积物沉积覆盖。他们将参加一次法国巡航，考察罗纳河沿岸地区。这是一个相对年轻的边缘，保存得很好。该巡航将获得多区域地震数据，这些数据将与现有数据一起进行解释，以重建从峡谷切割和切口到沉积物楔的后期再发育的演化边缘的结构。

During the Messinian desiccation of the Mediterranean around 6 m.y. ago, exposed margins were severely eroded to a new base level ca. 2 km below present day sea level, leading to massive subaerial erosion of existing shelf platforms, transforming many margins into basinward dipping ramps. During the subsequent flooding these were then covered by aggrading to prograding Pliocene sediments. The PIs will participate in a French cruise and examine the Rhone River margin. This is a relatively young margin and is well preserved. The cruise will acquire multi-chammel seismic data, which, along with the existing daa, will be interpreted to reconstruct the architecture of the evolving margin, from canyon cutting and incision to late rdevelopment of the sediment wedges.