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Description: A dense, searing cloud from a distant volcanic eruption races across the Colorado landscape toward what is now Castle Rock. This superheated volcanic ash solidifies as soon as it strikes the ground. The landscape is literally smothered in airborne liquid volcanic rock hot enough to melt glass. A few titanotheres are grazing near a stream, oblivious of the impending disaster.
Formation: Castle Rock Rhyolite
Artist: Jan Vriesen
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