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USGS CMG InfoBank: Introduction to Sedimentary Rocks


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Comment: 00:40 - 01:22 (00:42)

Source: Annenberg/CPB Resources - Earth Revealed - 17. Sedimentary Rocks: The Key to Past Environments

Keywords: introduction, "Grand Canyon", "Colorado River", canyon, gorge, ravine, "geologic history"

Our transcription: The Grand Canyon, one and a half kilometers deep and over 300 kilometers long, a gigantic chasm gouged out of the face of the Earth by the Colorado River.

This is one of the most intricate systems of canyons, gorges, and ravines in the world.

The spectacular beauty of this awesome abyss draws millions of visitors each year.

But the Grand Canyon is more than just a tourist attraction -- it is a stunning microcosm of this planet's geologic history.

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Accessibility FOIA Privacy Policies and Notices
U.S. Department of the Interior \| U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/16.01.01.html Page Contact: InfoBank staff Page Last Modified: Tue Dec 16 06:31:35 PST 2008 (wcs)