Formed of volcanic ash 30 million years ago and sculpted by wind and water into rows of monolithic blocks, City of Rocks State Park takes its name from these incredible rock formations. The rock formations at the park are so unique that they are only known to exist in six other places in the world.

Some links for City of Rocks, NM

http://www.emnrd.state.nm.us/nmparks/PAGES/parks/cityrock/cityrock.htm

http://www.zianet.com/snm/cityrock.htm