When hundreds or thousands of coral polyps build their skeletons close together, they create a calcium carbonate structure that provides habitat and food for a variety of organisms. This is known as a coral reef. Explore a virtual coral reef. More Info - Common Coral Forms; More Info - Fringing Reefs
Arch Cape is an unincorporated community in Clatsop County, Oregon, United States. It is located along the Pacific coast about 4 miles south of Cannon Beach. The Arch Cape post office, established in 1912, has ZIP code 97102. The community was named for a natural arch in the coastal rocks.
Landscape Arch is located in the Devils Garden section of Arches National Park in Utah, the US. Landscape. The Landscape Arch is considerably old and almost near the end of its lifecycle. In its thinnest section the arch is only 6 feet thick, yet it supports a span of rock 290 feet long.