Breccia Cliffs of Mount Sublette, Wyoming
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Sun breaks out of the clouds for a moment, lighting the sheer, rotten breccia cliffs of Mount Sublette, as seen from Sublette Peak.
The breccia is, in this case, a hardened volcanic ash that contains rocks loosely cemented together. It often looks like the knob-studded conglomerate that makes for good climbing, but more often than not, it is treacherously brittle.
Absaroka Range, WY-- July 2007