Radioactive sauropod dinosaur bone in sandstone (Morrison Formation, Upper Jurassic; Dinosaur Ridge, west of Denver, Colorado, USA) : 無料・フリー素材/写真
Radioactive sauropod dinosaur bone in sandstone (Morrison Formation, Upper Jurassic; Dinosaur Ridge, west of Denver, Colorado, USA) / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | The dark brown structure in the rock is a radioactive dinosaur bone, hosted in fluvial sandstones of the Morrison Formation (middle Upper Jurassic) at Dinosaur Ridge, near Denver, Colorado, USA. Dinosaur bones are common in this sandstone unit - they have been partially permineralized/replaced by the radioactive, uranium-bearing mineral carnotite. Scintillometer reading on a bone here: 422 counts per minute (cf. background reading of 140 cpm).The bone is a pubic bone from a sauropod dinosaur, probably Atlantosaurus. |
| 撮影日 | 2014-11-25 18:34:47 |
| 撮影者 | James St. John |
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