Depositional Effects of 2004 Tsunami and Hypothetical Paleotsunami Near Thap Lamu Navy Base in Phang Nga Province, Thailand

Depositional effects of 2004 tsunami and hypothetical paleotsunami near Thap Lamu Navy Base in Phang Nga Province, Thailand, were investigated. During tsunami, the Andaman Sea coast was heavily affected and a layer of deposits was left covering most of the tsunami-inundated coastal zone. The majority of deposits were composed of sand, with some boulders derived from coral reefs and small, floating boulders in bimodal tsunami deposits. The results from the grain size analysis revealed that samples consisted mostly of medium to coarse grain sand, were moderately to poorly sorted, and were very fine to very coarse skewed. It was concluded that four pre-tsunami soil samples demonstrated similar distributions when compared to the 2004 tsunami deposits.