Dry granular flows can generate surface features resembling those seen in Martian gullies

Shinbrot et al. 10.1073/pnas.0308251101.

Supporting Information

Files in this Data Supplement:

Supporting Figure 5
Supporting Movie 1
Supporting Movie 2

Fig. 5. Lightweight grains settle slowly, thereby producing fluid-like motion. For example, hollow ceramic spheres in a simple container smoothly flow to produce downstream waves (progression from a to c in different experimental realizations), and upstream ripples that develop into mountainous peaks (b).

Suppporting Movie 1

Movie 1. The dynamical motion of slowly settling grains can include transverse waves, sloshing against boundaries, and splashing in a manner that is difficult to distinguish from fluid flow. This movie displays some of these features.

Suppporting Movie 2

Movie 2. In slow motion, we can resolve the waves and sloshing behaviors shown in Movie 1.