A big hiatus found in a piston core from the Korea Plateau of the East Sea: Geological and Tectonic implications

Abstract

A piston core was collected from the Korea Plateau, East Sea of Korea showed distinctive lithological changes,composed of hemipelagic with slight turbiditic upper layer (Unit II) and coastal sandy lower layer (storm reworking)(Unit I). It is assumed that there were, at least, 5 Ma unconformity between Unit I and Unit II, suggesting that significanttectonic event or continuous subsidence of Korea Plateau had taken place in East Sea. More detailed tectonic dataincluding bottom profile from deep seismic may confirm this big hiatus and tectonic history of the East Sea.It is assumed that there were, at least, 5 Ma unconformity between Unit I and Unit II, suggesting that significanttectonic event or continuous subsidence of Korea Plateau had taken place in East Sea. More detailed tectonic dataincluding bottom profile from deep seismic may confirm this big hiatus and tectonic history of the East Sea.