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构造运动:当正常压力的砂岩被快速抬升(参照发生的地质时期)时,其上覆围压卸载的速度会超过砂岩自身(砂岩)内部孔隙压力的释放的速度,导致(砂岩下部的)盐穹向上刺穿,低密度的盐席沉积是大规模海泛的结果,(由于上下密度倒置)会促使盐席向上运移刺穿上覆层,取代其上的沉积层.

Structural Movement: If a normally pressured sand is lifted rather rapidly relative to geologic time, the overburden pressure may decrease more rapidly than the pore pressure can dissipate. This can occur as a result of piercement salt domes, plumes of low-density salt deposited by ambient seas, which force their way upward through the sediment, displacing the deposited layers.