Bottom of Grand Canyon
March 16, 2005
Provided and copyright by: Mark Meyer, Mark Meyer Photography
Summary authors & editors: Mark Meyer
The photo above showing vishnu schist and zoroaster granite was taken from the bottom of the Grand Canyon, Arizona in January 2002. This is some of the oldest exposed rock in the world, with an average age of 1,700 to 2,000 million years. These rock layers were once the base of an ancient mountain range, comparable to the Rockies, which over time completely eroded away and now provides a tantalizing glimpse of the enormous time scale on which geologic events occur. The Colorado River is in the foreground.
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