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Summary

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Description

Stratigraphy of the Grand Canyon. "Grand Canyon 'yardstick' of geologic time: A guide to the

canyon’s geologic history and origin."
Source https://www.nps.gov/articles/images/pop-up-yardstick.jpg
Author Mathis, A. 2006. Grand Canyon Association, Grand Canyon, Arizona, USA.
Permission
( Reusing this file)		 PD-USGov, see below and http://www.nps.gov/disclaimer.htm

Licensing

Public domain This image or media file contains material based on a work of a United States Department of the Interior 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 in the United States. See the Department of the Interior copyright policy for more information.

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Date/TimeThumbnailDimensionsUserComment
current 22:39, 11 March 2008 Thumbnail for version as of 22:39, 11 March 2008600 × 819 (1.48 MB)Jo Weber{{Information |Description=Stratigraphy of the Grand Canyon |Source=http://www.nature.nps.gov/geology/parks/grca/age/image_popup/yardstickstratcolumn.png |Date= |Author= |Permission=PD-USGov, see below and http://www.nps.gov/disclaimer.htm |other_versions
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