Story Behind the Photo: Kolob Canyon Erosion

Kolob Canyon Hanging Valley, Zion National Park, UT

Like many other national parks in the Southwest, Kolob Canyon was formed over thousands of years thanks to several types of erosion. A combination of uplift along several fault lines and downcutting from nearby streams and creeks helped form the main finger canyons in Kolob Canyon and shaped the landscape.  This photo shows what is known as a hanging valley, formed when uplifting of the rocks along the canyon wall created a gap that water naturally runs through after it rains. After heavy rains waterfalls can appear, but they are usually gone within a few minutes. The dark streaks along the rocks are iron and manganese deposits and are an easy way to identify these sometimes waterfalls and hanging valleys.

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