June 8: Optional trip for Gunma students

Sunnyside lunch at Shibu Toge

Investigating Holocene ashes from Yugama at Yamada Toge. The white layer is a fallout clay of 2,500 years ago.

Impacting structure

Climbing on top of the Oshi ignimbrite to see Apm

Biotite-bearing Apm tephra from Japan Alps (Hida Mtns) about 360,000 years ago

The new source of Kawarayu Hotspring

very hot and good water!