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Red Rocks Unconformity
The plaque marks the
unconformity
between the Fountain Formation and Proterozoic
gneiss
, 1.4 billion years older. All evidence of the vast time between is gone.
Photo (c) 2007 Andrew Alden, licensed to About.com (
fair use policy
)
4
of
6
Gallery Index:
The Rocks of Red Rocks, Colorado
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