[H-QR05] [JJ] Diachronic dynamics of human-environment interactions

[HQR05-P09] Tephras from Tarumai volcano in Tonbetsu Plain, Northern Hokkaido,Japan

*Akihiro Yokota¹, Reisuke Kondo², Kiyoyuki Shigeno¹, Tatsuo Kanamaru³, Hiroshi Ushiro⁴, Hiroko Fujita⁵ (1.Meiji Consultant Co., Ltd, 2.Kogakkan University, 3.Nihon University, 4.Hokkaido Museum, 5.Hokkaido University)

Keywords:Tephra, Sand dune, Tarumai volcano, Tonbetsu plain, Holocene

Tarumae volcano is an active volcano that performs multiple volcanic activities from the beginning of the Holocene. Tephra of Tarumae volcano are Ta-a, Ta-b, Ta-c 2, Ta-d. They are distributed throughout Hokkaido. However, the Tonbetsu plains have few mention examples of tephra.
In this study, we analyzed it with an outcrop mention in Northern Hokkaido, Hamatonbetsu coastal area and examined tephra.
As a result it was estimated that two tephra layers distributed over the Tonbetsu plains were correlation of the Tarumai volcano.