POTD September 13, 2013: Zion National Park, Washington County, Utah

Zion National Park, Washington
County, Utah
Photographer: Tyler Knudsen

Utah showcases a multitude of canyons as varied as its high mountains and dry deserts. Ranging from V- and U-shaped valleys at the edge of mountains to deep and narrow slot canyons in the south, the shapes result from types of erosion and factors such as precipitation amount and rock type. Erosion can be from powerful rivers and glaciers, forceful flash floods, or winds adding a sculpting touch.

A unique tunnel-like passage sculpted by stream water is called the Subway section in this slot canyon in Zion National Park, Washington