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37 million
years ago (Late Eocene)

Find the clickable
hot spots for details and evidence, or follow the links below. (Click
to see larger image) |
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
Best Viewing
Spots:
- Rock Park
(Castle Rock)
- Mesa tops
between Castle Rock and Monument Hill
- Molly Brown
House Museum
- Castlewood
Canyon State Park
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A Capitol Hill neighborhood mansion made of Castle Rock Rhyolite
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