Girkin Limestone (Upper Mississippian; Dixon Cave Trail, Mammoth Cave National Park, Kentucky, USA) 2 : 無料・フリー素材/写真
Girkin Limestone (Upper Mississippian; Dixon Cave Trail, Mammoth Cave National Park, Kentucky, USA) 2 / 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 | Limestone in the Mississippian of Kentucky, USA.This is an outcrop of Girkin Limestone, the uppermost of three Mississippian-aged limestone units that hosts Mammoth Cave in Kentucky - the longest cave on Earth. As of fall 2017, 412 miles of passages have been explored and mapped.Fine-grained limestones (micrites, or lime mudstones) and fossiliferous limestones (wackestone) of the upper Girkin Limestone can be closely examined along the Dixon Cave Trail in Mammoth Cave National Park. Obvious macrofossils in these rocks include solitary rugose corals ("horn corals") (Animalia, Cnidaria, Anthozoa, Rugosa).Stratigraphy: Girkin Limestone, lower Upper MississippianLocality: outcrop along Dixon Cave Trail, far-northern Mammoth Cave Ridge, Mammoth Cave National Park, western Kentucky, USA |
| 撮影日 | 2011-10-14 10:19:56 |
| 撮影者 | James St. John |
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