Denuded by the Indochina movement, the core of the palaeohigh has no cap rocks like the J4 gyprock.

古隆起核部因曾遭受早印支运动强烈的剥蚀，已段良好的膏岩作盖。

Duiker, William J. U.S. Containment Policy and the Conflict in Indochina. Stanford: Stanford University Press, 1994.

，《国围堵政策和中南半岛的冲突》，史丹福：史丹福大学出版社，1994年。