Grand Canyon Trail of Time

Marker at the beginning of the Grand Canyon Trail of Time
Originally uploaded in Cutting Edge:Topics:Rates and Time.

Image 27465 is a 349 by 325 pixel JPEG
Uploaded: Mar18 11

Last Modified: 2011-03-18 13:16:48
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National Park Service photo by Michael Quinn
This item is in the public domain
and maybe reused freely without restriction.