A coral reef is made of thin layers of calcium carbonate A coral reef is made of thin layers of calcium carbonate National Ocean Service National Oceanic and Atmospheric Administration U.S. Department of Commerce
Arches is located in northeastern Utah, near the city of Moab. The park is famous for over 2,000 natural stone arches and offers much to the outdoor traveler. There is a 40-mile paved loop tour of the park with numerous trailheads and outlooks.
History: How Arches National Park Was Formed. High above the Colorado River, Arches National Park is a geological maelstrom that has been shaped by eon after eon of weathering by rain, snow, ice, and wind.ost of the formations in the park are composed of Entrada sandstone, which geologists say was part of a low arid coastal plain adjacent to a great inland sea 150 to 200 million years ago.