海平面

The formation of auriferous stratawas controlled by volcanism and eustacy.

火山作用和变化对含金地层的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.

对于研究全新世构造运、全新世变化等具有重要的科研、科普价值。