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Natural coal fired rock

This rock is partially melted and stained red and black, probably by a <a href="http://www.groundtruthtrekking.org/Issues/AlaskaCoal/CoalFires.html">natural coal fire</a> in a seam near it.
— This rock is partially melted and stained red and black, probably by a natural coal fire in a seam near it.

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Photo taken by Erin McKittrick, Bretwood Higman

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By Ground Truth Trekking

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