Sea notch Vung Chay, Trang An, VietnamYour model is disabled. For more details go to Edit properties3D Model
Trang An has been subjected to several cycles of sea inundations since the Last Glacial Maximum. The most extensive one took place during the Middle Holocene between 8000 and 4000 years ago when sea levels rose to 5.6 m above current sea levels. The sea eroded distinct notches out of the soluble limestone cliffs, which occur through the limestone massif. At Vung Chay, two distinct notches can be seen at 5.6 m and at the current water table. Notches at other locations can be compoised of up to 4 different notches. To determine the reason for their presence their age must be determined, which helps us to reconstruct a chronology for their formation and understand how the notches are related to each other. Oyster shells that grew inside these notches during sea inundations can still be found stuck to the limestone or embedded in hardened marine sediment today. One of these shells from a different notch but at the same height was radio carbon dated to 5300 BP.