Fossiliferous limestone (Columbus Limestone; Middle Devonian; Ohio, USA) 6 : 無料・フリー素材/写真
Fossiliferous limestone (Columbus Limestone; Middle Devonian; Ohio, USA) 6 / 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 | Brachiopod in fossiliferous limestone from the Devonian of Ohio, USA.The Columbus Limestone is a significant carbonate unit in the Devonian of central and northern Ohio. It's actually part of a much more widespread sheet of Devonian carbonates that extends from New York State to the Midwest. The Columbus Limestone represents deposition in a subtropical, shallow-water, carbonate platform environment. The rocks are principally micritic limestones, fossiliferous wackestones, and fossiliferous packstones. Some chert nodules are present in the unit. Fossils are typical Paleozoic shallow marine invertebrates - favositid corals, rugose corals, stromatoporoids, brachiopods, crinoids, blastoids, bryozoans, trilobites, bivalves, gastropods, cephalopods, rostroconchs, and tentaculites. Microfossils include conodonts and charophyte oogonia. Other fossils in the Columbus Limestone include vertebrates (fish), land plants (rare), and trace fossils. Some horizons in the Columbus Limestone have silicified or partially silicified fossils.Stratigraphy: Columbus Limestone, Middle DevonianProvenance: unknown, but possibly from a central Ohio quarryLocality: large loose slab on the grounds of the Ohio Department of Natural Resources, Columbus, Ohio, USA |
| 撮影日 | 2018-04-14 07:20:26 |
| 撮影者 | James St. John |
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