Having grown up in Western Michigan, sand can and does do some strange things. There are lakes on the eastern shore of Lake Michigan that are close to the big lakes shoreline that will eventually be completely filled in due to the movement of the sand. The Great Lakes, Finger Lakes and most of the northern US are all glacial effected. Long Island sound is an estuary made by glacial movement and Long Island is the pile of rubble that was at the southern "nose" of the glacier.
It's cool stuff for whatever or whomever keeps it interesting...
