devil's postpile basalt columns (california)

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Devil's Postpile - Columnar Basalt in the Eastern Sierra (California)

A basalt volcanic flow formed hexagonal-shaped columns when it cooled down.­

For more info about this rock formation, go to en.­wikipedia.­org/­wiki/­Devils_­Postpile_­National_­Monument.

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Eastern Sierra (California) Volcanic Areas of the Pacific North-West
Inyo National Forest, Pacific Crest Trail, California, USA