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You are browsing the archive for 12 September 2011 - Mountain Beltway.

12 September 2011

Clinker

“Clinker” is an interesting rock type seen in Wyoming’s Powder River Basin. It forms when a coal seam catches fire, and cooks the rock above and below it, including the potential for partially melting the strata immediately above. Check out a few images of this intriguing rock here.

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