Fish bone with blue vivianite (Chattanooga Shale, Upper Devonian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 3 : 無料・フリー素材/写真
Fish bone with blue vivianite (Chattanooga Shale, Upper Devonian; Burkesville West Rt. 90 roadcut, Kentucky, USA) 3 / 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 | Fossil fish bone in the Devonian of Kentucky, USA. (handlens for scale)This is a piece of fossil fish bone - it is probably derived from a placoderm, an extinct group of mostly predatory, jawed fish (exemplified by Dunkleosteus - www.flickr.com/photos/jsjgeology/33974292562). The fossil was found in the basal Chattanooga Shale, a unit of dark-colored, chippy-weathering, marine mudshales of Late Devonian age. These black shales were deposited in a moderately deep, anoxic seafloor environment. This was a widespread lithofacies during the Late Devonian's Global Anoxia Event. The Chattanooga Shale is equivalent to the Ohio Shale, the Antrim Shale, and the New Albany Shale in surrounding states.The bluish coloration covering part of the bone is vivianite (Fe3(PO4)2·8H2O - hydrous iron phosphate).Classification: Animalia, Chordata, Vertebrata, PlacodermiStratigraphy: basal Chattanooga Shale, Upper DevonianLocality: roadcut on the northern side of Route 90, just west of Burkesville, central Cumberland County, southern Kentucky, USA (36° 47’ 51.17” North latitude, 85° 23’ 10.62” West longitude) |
| 撮影日 | 2018-03-13 15:21:19 |
| 撮影者 | James St. John |
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