Lowstand Wedge

Basin-floor fan

Incised valley

Lowstand wedge

Shelf Break

Lowstand Systems Tract

Clastic Movie

Two-sided Clastic and Carbonate Fill of a Sedimentary Basin

One or more progradational parasequence sets making up a wedge that is restricted seaward of the shelf break and that onlaps the slope of the preceding sequence. The most proximal part of the wedge consists of incised-valley fills and their associated lowstand-shoreline deposits on the shelf or upper slope. In basins with shelf-slope breaks, the major part of the wedge is composed of a thick, mostly shale-prone, prograding wedge-shaped unit that downlaps onto the slope fan and consists of shallowing-upward lowstand deltas and associated sediments that prograde basinward and pinch out landward.

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