New words and phrases Anticline:背斜 Syncline:向斜 Outcrop:露头 As the water slows down,first the coarse material settles,the cobbles,shingle and gravel.Then sand,silt and finally mud.由于水流变慢，首先粗的 砾石沉积，然后是砂石，粉砂，粘土New words and phrases Anticline：背斜 Syncline：向斜 Outcrop：露头 As the water slows down, first the coarse material settles, the cobbles, shingle and gravel. Then sand, silt and finally mud. 由于水流变慢，首先粗的 砾石沉积，然后是砂石，粉砂，粘土