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?
The rocks are about the size and shape of my Dad’s big Masonic Bible. So they are not “small rocks”. At least if you were tossing them...
And the theory has always been that they slid along the mud when it rained. Like anywhere else out there, the mud would be very fine and slippery. This is the first time I’ve heard the ice sheet theory.