Glacial Striations on Basalt Columns - Devils Postpile (California)

glacial striations on basalt columns - devils postpile (california), california, columnar basalt, columns, devils postpile, eastern sierra, erosion, forest, geology, glacial polish, glacial striations, landscape, lava flow, rock formation, trees, volcanic

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Glacial Striations on Basalt Columns - Devils Postpile (California)

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california columnar basalt columns devils postpile eastern sierra erosion forest geology glacial polish glacial striations landscape lava flow rock formation trees volcanic

The top of the columns of Devils Postpile - Columnar Basalt in the Eastern Sierra (California)

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

You can clearly see the parallel grooves showing the erosion caused by debris pushed by the slow-moving ice of the glacier that used to cover this valley. Those marks are called glacial striations.

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

Date & GPS location

Photo taken on October 27, 2014

Inyo National Forest, Pacific Crest Trail, California, USA

GPS coordinates: 37.624977,-119.084773 - Download KML file for Google Earth (and other mapping apps)

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