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Montage of images and link description. Lost in the Grand Canyon Imagemap: linked to kids and home
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The American Experience
Geology of the Grand Canyon

The canyon is a Book of Revelations in the rock-leaved Bible of geology.
- John Wesley Powell

A professor of geology at Illinois Wesleyan, John Wesley Powell had more than just a passing interest in the layers upon layers of rocks exposed by the Colorado River. The expedition down the Green and Colorado Rivers, he would later claim, "was not made for adventure, but purely for scientific purposes, geographic and geologic." And indeed, he did devote a great deal of time to these purposes. In the afternoon, while his crew set up camp for the night, Powell would often climb into the canyon to investigate.

Much has been learned about the geology of the Grand Canyon and about the history of life on earth since Powell and his crew made their expedition in 1869. "Scroll Down through History" displays the layers of rock exposed within the Grand Canyon and shows when in earth's history they formed.


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Cutaway of the Grand Canyon




Go to "Scroll Down through History"

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