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File:Canyon Diablo meteorite, pattern.jpg

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Description

Octahedrite - large cut-polished-nitric acid etched slice of the Canyon Diablo Meteorite that fantastically displays the Widmanstätten structure.

Meteor Crater (Barringer Crater) in the Arizona desert was formed by the impact of an octahedrite ~49,000 years ago during the Late Pleistocene. The rock shown here is a fragment of the impactor, the Canyon Diablo Meteorite. Such fragments have been collected for decades from the desert surrounding the crater. Canyon Diablo is composed of ~90% kamacite, ~1-4% taenite, and up to 8.5% troilite-graphite nodules (FeS & C). The original mass has been estimated to be 100 feet across & about 60,000 tons. Canyon Diablo rocks are well dated to 4.55 billion years.

Field Museum of Natural History public display (Chicago, Illinois, USA).
Date
Source Flickr: Canyon Diablo Meteorite
Author James St. John
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This image, which was originally posted to Flickr, was uploaded to Commons using Flickr upload bot on 10 July 2011, 16:57 by Basilicofresco. On that date, it was confirmed to be licensed under the terms of the license indicated.
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24 June 2011

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current16:58, 10 July 2011Thumbnail for version as of 16:58, 10 July 2011806 × 551 (112 KB)Flickr upload botUploaded from http://flickr.com/photo/47445767@N05/5868072416 using Flickr upload bot

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