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Description Stratigraphy of the Grand Canyon
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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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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= |Date= |Author= |Permission=PD-USGov, see below and |other_versions
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