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The seismic profile andgeologic  section shown in Figure 2 is taken across the north margin of the platform. The lack of deformation is evident in the section with the present basin topography essentially unchanged from the end of the Visean. Uplift and doming of the platform has resulted in the removal of between one to two km of Namurian and Westphalian sediment. The maximum cover for the platform is therefore somewhere between one and two km with maximum basin depths on the order of five km attained towards the end of the Carboniferous.