A crevasse splay is a sedimentary fluvial deposit which forms when a stream breaks its natural or artificial levees and deposits sediment on a floodplain. A breach that forms a crevasse splay deposits sediments in similar pattern to an alluvial fan deposit. Once the levee has been breached the water flows out of its channel. As the water spreads onto the flood plain sediments will start to fall out of suspension as the water loses energy. The resulting deposition can create graded deposits similar to those found in Bouma sequences. In some cases crevasse splays can cause a river to abandon its old river channel, a process known as avulsion. Breaches that form a crevasse splay deposits occur most commonly on the outside banks of meanders where the water has the highest energy. Crevasse spla
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| - Crevasse splay (en)
- Delta de rupture de levée (fr)
- クレバススプレー (ja)
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| - Un delta de rupture de levée ou épandage de crevasse (par traduction littérale du terme anglais crevasse splay) est un dépôt fluvial sédimentaire qui se forme lorsqu'un ruisseau brise ses levées naturelles ou artificielles et dépose des sédiments sur une plaine inondable. (fr)
- クレバススプレー (crevasse splay) とは、氾濫原において、自然堤防もしくは人工堤防が決壊した際に形成される河成堆積物を言う。堤防決壊堆積とも呼ぶ。 クレバススプレーを形成する破堤口は、沖積錐と類似したパターンの堆積物を残す。堤防の決壊に際して水路から水が流出するが、水が氾濫原へ広がりエネルギーを失うにつれて堆積物は沈殿を始める。結果として、に見られるものと類似したを持つ堆積層が生じることがある。クレバススプレーにより河川が旧流路から逸れることもあり、この過程を avulsion と呼ぶ。破堤口は、水のエネルギーが最も大きくなる、蛇行部の外側に生じることが最も一般的である。クレバススプレーの規模は、堤防近くでの厚みが 6 m、範囲 2 km に及ぶ大きなものから、1 cm の厚みしかない小さなものまで様々である。 (ja)
- A crevasse splay is a sedimentary fluvial deposit which forms when a stream breaks its natural or artificial levees and deposits sediment on a floodplain. A breach that forms a crevasse splay deposits sediments in similar pattern to an alluvial fan deposit. Once the levee has been breached the water flows out of its channel. As the water spreads onto the flood plain sediments will start to fall out of suspension as the water loses energy. The resulting deposition can create graded deposits similar to those found in Bouma sequences. In some cases crevasse splays can cause a river to abandon its old river channel, a process known as avulsion. Breaches that form a crevasse splay deposits occur most commonly on the outside banks of meanders where the water has the highest energy. Crevasse spla (en)
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| - A crevasse splay is a sedimentary fluvial deposit which forms when a stream breaks its natural or artificial levees and deposits sediment on a floodplain. A breach that forms a crevasse splay deposits sediments in similar pattern to an alluvial fan deposit. Once the levee has been breached the water flows out of its channel. As the water spreads onto the flood plain sediments will start to fall out of suspension as the water loses energy. The resulting deposition can create graded deposits similar to those found in Bouma sequences. In some cases crevasse splays can cause a river to abandon its old river channel, a process known as avulsion. Breaches that form a crevasse splay deposits occur most commonly on the outside banks of meanders where the water has the highest energy. Crevasse splay deposits can range in size. Larger deposits can be 6 m (20 ft) thick at the levee and spread 2 km (1.2 mi) wide, while smaller deposits may only be 1 cm (0.39 in) thick. (en)
- Un delta de rupture de levée ou épandage de crevasse (par traduction littérale du terme anglais crevasse splay) est un dépôt fluvial sédimentaire qui se forme lorsqu'un ruisseau brise ses levées naturelles ou artificielles et dépose des sédiments sur une plaine inondable. (fr)
- クレバススプレー (crevasse splay) とは、氾濫原において、自然堤防もしくは人工堤防が決壊した際に形成される河成堆積物を言う。堤防決壊堆積とも呼ぶ。 クレバススプレーを形成する破堤口は、沖積錐と類似したパターンの堆積物を残す。堤防の決壊に際して水路から水が流出するが、水が氾濫原へ広がりエネルギーを失うにつれて堆積物は沈殿を始める。結果として、に見られるものと類似したを持つ堆積層が生じることがある。クレバススプレーにより河川が旧流路から逸れることもあり、この過程を avulsion と呼ぶ。破堤口は、水のエネルギーが最も大きくなる、蛇行部の外側に生じることが最も一般的である。クレバススプレーの規模は、堤防近くでの厚みが 6 m、範囲 2 km に及ぶ大きなものから、1 cm の厚みしかない小さなものまで様々である。 (ja)
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