POTD November 3, 2015: Zion National Park, Washington County, Utah
Zion National Park, Washington County, Utah
Photographer: Adam McKean; © 2015
The setting sun illuminates the Jurassic-age Navajo Sandstone cliffs of Cougar Mountain (right) and South Guardian Angel (left) as viewed from Kolob Reservoir Road. Here, the road travels on top of the 220,000- to 310,000-year-old Grapevine Wash lava flow (dark rocks in middle ground).