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File:Grand Canyon Trail of Time - Folded Vishnu basement rock.jpg

Description The Trail of Time is an interpretive walking trail that focuses on Grand Canyon's vistas and rocks, encouraging visitors to ponder, explore, and understand the magnitude of geologic time and the stories told by canyon's rock layers and landscapes. Walking the trail is intended to give park visitors a visceral appreciation for the magnitude of geologic time...

.. This 4.56 km (2.83 mile) long trail is actually a geologic time-line. Each meter on the trail signifies one million years of Grand Canyon's geologic history; and bronze markers mark one meter intervals. Every tenth marker is labeled in millions of years. NPS Photo by Erin Whitakker .

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Date 21 January 2011, 11:44:10
Source Flickr: Grand Canyon Trail of Time - Folded Vishnu basement rock - 0331
Author Public Domain
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Checked copyright icon.svg This image, which was originally posted to, was uploaded to Commons using Flickr upload bot on 20:21, 3 January 2013 (UTC) by Tillman ( talk). On that date it was licensed under the license below.
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Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain. See the NPS website and NPS copyright policy for more information.

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