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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). |
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| Date | |||
| Source | Flickr: Canyon Diablo Meteorite | ||
| Author | James St. John | ||
| Permission (Reusing this file) |
  This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:58, 10 July 2011 | | 806 × 551 (112 KB) | Flickr upload bot | Uploaded from http://flickr.com/photo/47445767@N05/5868072416 using Flickr upload bot |
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