Depositional and structural architecture of prograding clastic continental margins: tectonic inftuence on patterns of basin filling

Progradation of a sediment wedge into an oceanic basin induces regional isostatic subsidence and a
predictable structural and depositional architecture. The combination of large scale, slope morphology;
and undercompaction makes continental margin wedges prime sites for syndepositional gravity tectonics.
Extension dominates the shelf margin; shortening characterizes the lower slope. Outbuilding clastic
wedges, such as the Cenozoic Gulf Coast margin, contain one or more deltaic depocenters that episodically
prograde directly onto the continental slope. Eustatic sea-level changes may inftuence depositional
patterns, but regional intraplate tectonic events and extrabasinal controls on rate and location of sediment
supply play an equally important ro le in determining genetic depositional sequence stratigraphy.