SearchThis phenomenon comes about in cold climates where ice formed on water breaks apart into small pieces and is known as slushy ice. Layers of this ice stick together in the cool waters and come ashore on waves. The waves spin the balls of ice smoothing them into balls—and when they land on the beach, they look like they make a perfect stash for a grand snowball fight. Examples of this have been spotted in Finland, Sweden and Siberia.
A slightly different phenomena is seen on the shores of Lake Michigan in the winter, but these balls tend to more boulder-sized. Ice sheets in the lake break and are churned into the waves. As the current takes them to the shores, they are rolled and formed by the waves and become ice spheres which eventually land on the shores looking like great white boulders.
