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Black Canyon of the Gunnison National Park NPS photo by Lisa Lynch
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Black Canyon of the Gunnison National Park
6: Additional Resources

Geologic Time, Online Edition by William L. Newman

This USGS online publication provides a thorough introduction to relative verses, absolute dating and the developmental history of the geologic time scale.

Fossils, Rocks and Time, Lucy E. Edwards and John Pojeta, Jr.

In this USGS online publication, learn the important role that fossils play in shaping the geologic time scale.

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Inner Canyon

Did You Know?
The temperature at the bottom of Black Canyon is approximately 8 degrees warmer than at the rim.
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Last Updated: July 31, 2006 at 16:14 MST