The first image below is a pretty neat looking wave in the sub-antarctic.

This next image is Rincon. By comparing these two satellite images (which are both taken from the same altitude, so that the scale between the two is exactly the same) it is possible to compare and contrast both waves. We can make some prediction about the unknown wave based upon what we know about Rincon. They are sedimentary points, both are created by a river mouth, they are roughly the same size, and they both consist of cobblestones.