Template:POTD/2011-07-27
Ocean waves and gravity have caused enough erosion on the cliffs here in Pacifica, California, that the building is in danger of falling over the edge. Erosion is the process by which sediment, soil, rock and other particles, are removed from a region of the Earth's surface. Erosion is distinguished from weathering, although the two processes may occur concurrently.Photo: Mila Zinkova