堆たい積せき作さ用よう

noun

sedimentation

Geological term for the process of sediment settling and accumulating, often in bodies of water.

• 堆たい積せき作さ用ようによって、河か口こうに広こう大だいな三さん角かく州すが形けい成せいされた。

  Through sedimentation, a vast delta was formed at the river mouth.