Skip to Main Content

Abstract

Linked shelf edge deltas and slope channel systems are observed in the eastern Gulf of Mexico. The slope channels are characterized by deep incision into the substrate and moderate sinuosity nearly to the shelf-slope break. Channelized flows were not fully confined as evidenced by well-developed levees up to 90 m thick. This sinuosity suggests that turbulent flow within the channel was likely nearly from the uppermost slope. With apparent turbulence characterizing these channels nearly to the shelf-slope break, the dominant mode of sediment delivery to the slope and basin beyond probably was in the form of density underflow (i.e., hyperpycnal flow) rather than shelf edge slump and/or slide progressively transformed into turbidity flow.

The stages of evolution of these slope channels are (1) clustering of small slope gullies on the slope at the initiation of lowstand deposition, (2) dominance of one of these slope gullies and formation of one significant channel, formation of a frontal splay fed by the dominant channel, (3) abandonment of frontal splay deposition in favor of leveed channel deposition across the entire slope, and (4) entrenchment of the leveed channel into the earlier deposited leveed channel and frontal splay.

You do not currently have access to this chapter.

Figures & Tables

Contents

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal