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In page Agulhas Bank:

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One of the largest known slumps occurred on the south-eastern edge of the Agulhas Bank in the Pliocene or more recently. Stretching from a depth of 190–700 m (620–2,300 ft), the so-called Agulhas slump is 750 km (470 mi) long, 106 km (66 mi) wide, and has a volume of 20,000 km3 (4,800 cu mi). It is a composite slump with proximal and distal allochthonous sediment masses separated by a large glide plane scar. In the western part, the sediments are dammed by basement ridges, but, in the eastern part, they have spread into the Transkei Basin. A series of slump scarps along the western edge of the shelf are 18–2 Mya, but covered by younger sediments brought there by the Benguela upwelling.[1]