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    Annotated videos from ROV Kiel 6000 during SONNE cruise SO210

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    The Chilean margin, which switched from erosion to accretion within the last several million years, has been chosen for this study. The extensive work offshore Central America has shown that fluid venting - mainly occurring at mounds, along faults and at sub- marine land-slip scarps in the mid-slope area of the continental margin – is controlled by the dewatering of subducted sediments. Morphological, geochemical, biological, geo- physical and volcanological investigations of the forearc of the Chilean subduction system between 33-37°S were the main focus of the SO210 expedition to test the model of the subduction hydrogeological system. A goal was to detect recent changes in the morphology of the sea floor and the discharge activity of fluids and gases that may have been caused by the earthquake on February 27, 2010, and the associated tsunami. Due to this multi disciplinary approach the deck and laboratories of RV SONNE were crowded with instrumentation like the ROV KIEL 6000, a gravity corer, CTDs, TV-grab, multicorer, a video sled and 4 landers, which can be deployed video-guided. This suite of instrumentation obtained the first comprehensive data set from fore-arc sediments off Chile
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