Buoyancy-dominated deltas occur where the river/basin setting consists of a deeper water level when compared to the friction-dominated delta. As shown in the figure above, this situation leads to the formation of subaqueous levees (parallel banks extending out from the channel). Other deposits common with this type of delta are distributary mouth bars (grading seaward), bar finger sands, distal bars, and prodelta clays.
Learn more about delta systems by linking to the following:
Wednesday, April 03, 2013