--> Figure 3

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Figure 3. Features of a typical retrograde failed shelf margin in which slump blocks are a large part of the fill. The most obvious discontinuity is the post-collapse unconformity, but the collapse detachment is equally important. The latter surface has never been exposed at the sea floor, and therefore is a structural rather than stratigraphic feature. Note the possibility for stratigraphic inversion and sub-discontinuity traps.