The Kasha-Katuwe Tent Rocks National Monument presents a small but intense display of erosion in action. It is located in the foothills of the Jemez Mountains, a region of past volcanic activity. Eruptions created alternating layers of compacted ash and windblown sediments, interspersed with hard rock fragments. Erosion over a 7 million year span formed deep canyons. The tent-shaped rocks were formed by symmetric erosion beneath hard cap stones. Surviving stones are delicately balanced on many of the columns.
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