Interference ripples in biogenic, aragonite sands (shallow subtidal seafloor in western French Bay, sw San Salvador Island, eastern Bahamas) : 無料・フリー素材/写真
Interference ripples in biogenic, aragonite sands (shallow subtidal seafloor in western French Bay, sw San Salvador Island, eastern Bahamas) / 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 | Interference ripples on modern shallow-water seafloor (western French Bay, southwestern San Salvador Island, eastern Bahamas). The seafloor sediments are composed of biogenic aragonite (CaCO3). The prominent ridges are symmetrical ripple marks, formed by a dominant, shallow-water, two-directional current. The smaller, ladder-like ridges are symmetrical ripple marks formed by a subordinate, shallow-water, two-directional current. The two sets of ripple marks form an interesting network of seafloor ridges - interference ripples.----------------Interference ripples (a.k.a. “ladderback ripples”) are uncommon sedimentary structures. They consist of sediment surfaces showing two sets of ripple crests intersecting at high angles. They indicate the existence of two successive or simultaneous current directions. |
| 撮影日 | 2011-03-21 14:38:45 |
| 撮影者 | James St. John |
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