Ha Long’s geological value
October 22nd, 2010
Halong Bay’s geological value has been evaluated in two ways: by the history of its formation and by its karst geomorphology. ormation history: The Halong Bay area has a long geological history, commencing nearly 500 million years ago, stretching through various ancient geological periods involving the processes of orogeny earth movements, marine regression, tectonic down-warping [...]