Cliffs of Ash Flow Tuff and Crooked River, Smith Rock, Oregon. Cascade Volcanoes in background.

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The tuff of Smith Rock erupted about 29 million years ago to form the Crooked Rider Caldera in Oregon's largest volcanic eruption. The tall tower on the right is a rhyolite dike; the bench on the left is basalt from Newberry volcano.

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Size: 6000px × 4000px
Location: Smith Rock State Park, Oregon
Photo credit: © Marli Miller / Alamy / Afripics
License: Royalty Free
Model Released: No

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