You have to understand the wind there is pretty intense, up to 70 mph on a regular basis. Even on a nice calm day there was wind out there, much more so that I ever expected.
Right, the pressure of a strong wind acting on a flat piece of ice could result in substantial forces being applied to the rocks. I could see the rocks being pushed along in slippery mud by these forces. Probably not big rocks but certainly, or conceivably, smaller rocks. I think their report specifically states that it’s smaller rocks that are moved.
And what’s the alternative theory....aliens?