Two Brackish Clay Beds along the Chao Phraya River of Thailand

Abstract

Two brackish clay beds of different age are found along the lower reaches of the Chao Phraya River of Thailand. The older one is from 2 to 6m above M. S. L. forming a terrace surface, with the outcrop area 100 to 150km inland from the Gulf of Thailand, and an equivalent bed is also to be found at a level 11m below M. S. L. near the gulf coast. This older clay bed is assumed to be of upper Pleistocene age. The younger one extends over a broad area facing the gulf and forms a very flat plain 2m above M. S. L. This is dated post-glacial by C_<14> dating.