Latest / America's National Parks, One at a Time
Zion: How the Virgin River Carved Slot Canyons a Thousand Feet Deep
Zion Canyon's narrow, towering walls come from a fast, steep river cutting through soft-but-solid Navajo Sandstone. We cover why the canyon is so dramatically narrow relative to its depth, how flash floods do most of the actual carving in minutes rather than years, and why the Virgin River is still cutting downward today.
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The skinny
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