They look like rocks but no, these are slabs of frozen slabs complete with icicles on Tiscomia Park Beach in Michigan. Frosty temperatures created the blocks which were carved by the howling winds and waves. Freezing drizzle helped out with some icicles.ST. JOESPH, Mich. – Mysterious slabs of frozen sand are showing up on the shore of Lake .They look more like on the bottom of the lake...