Wild Utah: America's Redrock Wilderness

DIRTY DEVIL AND THE HENRY MOUNTAINS
This land in south central Utah was the last to be mapped in the lower 48 states in the late 1800s. The Henry Mountains jut upward from underneath the Colorado Plateau sandstone, uniquely forming this "lacolithic" range. Like only a couple other ranges in Utah, lacoliths are volcanic magma intrusions that have not blown their top, merely breaking through the "skin" of overlying rock and pushing it upwards. The Dirty Devil canyon system drains to the east of the Henry Mountains and runs into the Colorado River at Lake Powell.

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