Tn back-arc Sydney Basin was intensely affected by back-arc spreading and trench subduction of the New England island arc, and developed serious earthquake and earthquake-related soft-sediment deformation.

• 因此,二叠纪处于弧后盆地的南悉尼盆地受弧后扩张和东侧弧前海沟俯冲的影响地震活动强烈,发育一系列与地震有关的震积岩,形成多种类型的与地震活动有关的软沉积物变形构造。