Dunes on Salt

We conducted experiments of dunes sitting on a mobile substrate to determine how the ratio of sand to salt thickness controlled dune subsidence. Experiments were conducted in a small tank using PDMS as a proxy for salt. A single dune (a cross-section of a linear dune, as linear dunes were thought to be on top of salt in the Gulf of Mexico) was deposited rapidly on top of the polymer and allowed to subside over time. We have raw time lapse images from two experiments with two different thickness ratios.

Minibasin Formation Due to Sediment Loading Over a Mobile Substrate

3D experiments examining the feedback between sediment loading by turbidite deposition and flow of a mobile substrate due to an unequally distributed sediment load that gives rise to minibasin formation.