Scallops (Rose's Pass, Mammoth Cave, Kentucky, USA) 22 : 無料・フリー素材/写真
Scallops (Rose's Pass, Mammoth Cave, Kentucky, USA) 22 / 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 | Scallops developed on Mississippian limestone in a Kentucky cave, USA.The irregularly scoop-shaped features shown here are scallops - asymmetrical, ridge-like, dissolutional features formed by flowing water. They somewhat resemble asymmetrical ripple marks, in that they form in a one-directional current, and the short side of each scallop represents the downstream direction.These examples are on a limestone wall in Rose's Pass in western Kentucky's Mammoth Cave, the longest cave on Earth. The system has 412 mapped miles, as of fall 2017.Larger, longer scallops formed in slower-moving water. Smaller, shorter scallops formed in rapidly-moving water.Stratigraphy: Ste. Genevieve Limestone, upper Middle MississippianLocality: Rose's Pass, between Boone Avenue and Jeanne's Avenue, Mammoth Cave Ridge, Mammoth Cave National Park, western Kentucky, USA |
| 撮影日 | 2011-06-14 16:27:02 |
| 撮影者 | James St. John |
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