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Chiricahua National Monument

Twenty seven million years ago a volcanic eruption of immense proportions shook the area of nearby Turkey Creek Caldera. The eruption eventually laid down two thousand feet of white hot ash and pumice. This mixture fused into a rock called rhyolitic tuff and eroded into the spires and unusual rock formations seen today.

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Location	Dos Cabezas Route Box 6500 Willcox Arizona 85643
Phone	520-824-3560
Website	http://www.nps.gov/chir/ ... seven million years ago a volcanic eruption of immense proportions shook the land around Chiricahua National Monument. One thousand times greater than the 1980 eruption of Mount St. Helens, the Turkey Creek Caldera eruption eventually laid down two thousand feet of highly silicious ash and pumice. This mixture fused into a rock called ...