Scallops (Black Snake Avenue, Mammoth Cave, Kentucky, USA) : 無料・フリー素材/写真
Scallops (Black Snake Avenue, Mammoth Cave, Kentucky, USA) / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Scallops developed on Mississippian limestone in a Kentucky cave, USA.The wavy features shown here are scallops - asymmetrical, curvilinear, 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. Larger, longer scallops formed in slower-moving water. Smaller, shorter scallops formed in rapidly-moving water.These examples are on a limestone surface in Black Snake Avenue in western Kentucky's Mammoth Cave, the longest cave on Earth. The system has 412 mapped miles, as of March 2019.Stratigraphy: Ste. Genevieve Limestone, upper Middle MississippianLocality: Black Snake Avenue (Level D), Mammoth Cave, western Kentucky, USA |
| 撮影日 | 2019-03-10 10:50:50 |
| 撮影者 | James St. John |
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