Quote:
Originally Posted by Ol' Ron
Increadable, what caused those rock formations.?
Ol' Ron
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As the earth's crust stretches, faults develop to accommodate the extension. Along these faults, mountains were pushed up and valleys dropped down, producing the distinctive alternating pattern of mountain ranges and valleys of the reserve.
As the rocky ranges rose, they were immediately subjected to weathering and erosion. The exposed bedrock was attacked by water, ice, wind and other erosional agents. Rock particles were stripped away and washed down the mountain sides, often covering young faults until they ruptured again.
More here:
http://www.nps.gov/ciro/naturescience/geology.htm