海平面

The formation of auriferous stratawas controlled by volcanism and eustacy.

火山作用和海面变化对含金地层形成起到了控制作用。

Wuguan marine erosion physiognomy has important geognosy significance in the study of structural movement and the changes in sea level in period of Holocene Epoch.

对于研究全造运动、全海面变化等具有重研、普价值。