posted on Sep, 29 2010 @ 06:25 AM
I’ve seen this in Oregon, and have pics somewhere. Some of The rocks are 2 ft in diameter, and leave trails several hundred feet long. My theory is
that the rocks are frozen in 6in. of ice or so. When the spring thaws occur the lakebed fills with slightly more water, floating the ice layer, and
partially lifting the rocks. At this point the Ice would lift the weight of the rocks, and the wind would blow the ice sheet around, causing the
smooth trails in the mud.