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English: Petrified Forest National Park, Arizona -- The pastel bands of color in the Blue Mesa indicate the type of environment in which the sediments were deposited. Blues and grays are a sign of carbon from decaying organic material that was buried or under water and not exposed to air. Reds result from an iron mineral, hematite. When exposed to air, even a small amount of iron causes the rocks to oxidize or rust. The whites represent nearly pure bentonite clay. Ground water, percolating through the buried sediments, also accounts for some color changes.
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Source https://www.flickr.com/photos/puroticorico/2390961693/in/datetaken/
Author puroticorico

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This image was originally posted to Flickr by puroticorico at https://www.flickr.com/photos/10058483@N00/2390961693. It was reviewed on 15 May 2009 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

15 May 2009

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Date/TimeThumbnailDimensionsUserComment
current18:22, 15 May 2009Thumbnail for version as of 18:22, 15 May 20093,072 × 2,304 (2.18 MB)FlickreviewRReplacing image by its original image from Flickr
16:55, 15 May 2009Thumbnail for version as of 16:55, 15 May 20091,024 × 768 (495 KB)Dyuku{{Information |Description={{en|1=Petrified Forest National Park, Arizona -- The pastel bands of color in the Blue Mesa indicate the type of environment in which the sediments were deposited. Blues and grays are a sign of carbon from decaying organic mate

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