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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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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).

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