等速下落;
Type ⅱ sequence interface was formed when the basement nonlinear subsidence speeded up and the tectonic subsidence acceleration was bigger than or equal to lake level falling acceleration.
Ⅱ型层序界面是在基底非线性加速沉降,并且构造沉降加速度大于或等于湖平面下降加速度的背景下形成的。
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