12 June 2015

Friday fold: Flow banding in obsidian, Newberry Volcano National Monument, Oregon

Posted by Callan Bentley

Lockwood Dewitt is the purveyor of this week’s Friday fold ensemble:

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All these folds are primary (not tectonic) in nature: they are flow banding of the viscous lava that oozed out to make the Big Obsidian Flow at Newberry.

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And closer in:

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One more:

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Awesome stuff! Thanks for sharing, Lockwood!

Happy Friday, everyone!