> Certainly dunes have form from evaporite materials.
And many examples of this on Mars from the MOC images. In the "meridiani" region where there are exposures of the "whiterock" formation you will frequently see light-colored dunes.
>The distinction between sand and silt is very important in sediments.
and
>Back to dust - the winds over the surface must be high enough to generate a swirling vortex in the crater, removing anything loose around the Burns Cliff area and forming the pattern at the base of the crater as a sort of standing wave.
The aeolian conditions on Mars are quite different than those we a accustomed to. A very thin atmosphere moving at high veolocites (200-300+ mph) would likely have unusal material transport characteristics. Have there been studies done on aeolian erosion-transport-deposition of the Martian atmosphere?
The winds travelling over the flatish Merdiani Plains at high speed and encountering Endurance crater would no doubt do unusual things. Endurance crater is plenty ood, and Victoria more so. I'm trying to figure out the "scallops" around it's rim.
Hort, I figured that the "grey" streaks were not really grey. The important thing is that they are a different color. From the first close-ish up pics (sol 278 navcam) they almost look fine silty-material deposited from water seeping from bedding planes.
--Bill
