chiricahua national monument

are the most common formation in the monument.] balanced rock is a boulder supported by a narrower column.] Chiricahua National Monument is a unit of the National Park Service located in Willcox, Arizona. It preserves the remains of an immense volcanic eruption that shook the region some 27 million years ago. Called the Turkey Creek Caldera eruption, it eventually laid down two thousand feet of ash and pumice, highly silicious in nature. This eventually hardened into rhyolitic tuff, and eroded into the natural features visible at the monument today. The national monument also preserves the Faraway Ranch, owned at one time by Swedish immigrants Neil and Emma Erickson.

External links

http://www.nps.gov/chir/index.htm - NPS web page for the site

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