1:45 PM - 3:15 PM
[O02-P49] Estimation of the origin and the age of tephra found in tsunami deposits at the mouth of Ota River
Keywords:tsunami deposits, widely distributed tephra, Kozu island Mt.Tenjo
We compared the form of volcanic glasses included in the tephra from Shoshuji Temple, with widely distributed tephra. We also estimated the age of the deposition by 14 C included in the dead plants.
As a result, we revealed that the tephra found at Shoshuji Temple is the deposits from the eruption of Mt.Tenjo in Kozu Island in 838. It was scattered by floods and tsunami, and then they reaccumulated.