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Visualized ploughmark statistics. Example of frequency distribution of the length (a), orientation (b), keel depth below the present seafloor (c) of iceberg ploughmarks buried within the palaeo-surface T0 (Base of the Sequence T) and scatter plots of orientation vs length (d), keel depth below seafloor vs orientation (e) and keel depth below seafloor vs length (f). Data points are coloured according to the orientation.
