File:Grand Canyon of Yellowstone edit.jpg

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English: Grand Canyon at Yellowstone National Park.The colors in the canyon are also a result of hydrothermal alteration. The rhyolite in the canyon contains a variety of different iron compounds. When the old geyser basin was active, the "cooking" of the rock caused chemical alterations in these iron compounds. Exposure to the elements caused the rocks to change colors. The rocks are, in effect, oxidizing; the canyon is rusting. The colors indicate the presence or absence of water in the individual iron compounds. Most of the yellows in the canyon are the result of iron present in the rock rather than sulfur.
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Adjusted. The original can be viewed here: Grand Canyon of Yellowstonen.jpg: . Modifications made by Kallerna.

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This image is a derivative work of the following images:

  • File:Grand_Canyon_of_Yellowstonen.jpg licensed with Cc-by-sa-3.0, GFDL
    • 2009-04-16T14:32:38Z Brocken Inaglory 2400x1793 (4200139 Bytes) improved quality
    • 2009-04-15T14:50:11Z Brocken Inaglory 2400x1793 (4312837 Bytes) {{Information |Description={{en|1=gc}} |Source=Own work by uploader |Author=[https://sites.google.com/site/thebrockeninglory/ Brocken Inaglory] |Date= |Permission= |other_versions= }}

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current07:01, 18 April 2009Thumbnail for version as of 07:01, 18 April 20092,400 × 1,793 (3.04 MB)Kallerna (talk | contribs){{Information |Description=Grand Canyon at {{w|Yellowstone National Park}}.The colors in the canyon are also a result of hydrothermal alteration. The rhyolite in the canyon contains a variety of different iron compounds. When the old geyser basin was acti

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