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.
An arch is a structure that is curved at the top and is supported on either side by a pillar, post, or wall. 2. countable noun. An arch is a curved line or movement. 3. countable noun. The arch of your foot is the curved section at the bottom in the middle. 4. verb.