Kevin Falk ☼ OrganicPix.com
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yellowstone
Walking on the Edge | Friday Dec 18, 2009
A cliff of columnar basalt across from Tower Falls in Yellowstone National Park; large floods of basalt lava preceded mega-eruptions of superheated ash and pumice 500,000 years ago. These cliffs are a textbook example of a basaltic lava flow with their well defined joints and hexagonal columns.
Tags: landscape people rock yellowstone
Galleries: Land
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