n.海面升降；海面变化
The formation of auriferous stratawas controlled by volcanism and eustacy. 火山作用和海平面变化对含金地层的形成起到了控制作用。
To sum up, it arose from eustacy, transportation of sediment and lithosphere uplift relatively of the region due to the neo-tectonic movement. 这可以从沉积砂堤与含贝壳砂堤的分布看出，它们都曾是不同时期海岸位置的所在。
The bottom boundary of sequence 3, sequence 4 and sequence 5 results from integrated effect of change of climate, sediment source and tectonic activity under falling global eustacy. 层序3、层序4和层序5的底界面是在构造作用稳定、全球海平面下降背景之上由相对海平面次一级旋回变化形成的，是古气候变化、沉积物供给及构造沉降共同作用的结果。
Sea level eustacy 海平面升降
