Logo link to homepage

Global Volcanism Program | Image GVP-06454

A roadcut west of the Ninokura dam exposes deposits from Towada. The thick light-colored unit at the base is the Hachinohe ignimbrite that formed about 13,000 years ago during the last of a series of explosive eruptions that resulted in the incremental formation of Towada's 11-km-wide caldera. The thinner light- and dark-colored deposits above the Hachinohe ignimbrite were produced by post-caldera eruptions, the most recent of which took place in 915 CE. Photo by Yukio Hayakawa (Gunma University).

A roadcut west of the Ninokura dam exposes deposits from Towada. The thick light-colored unit at the base is the Hachinohe ignimbrite that formed about 13,000 years ago during the last of a series of explosive eruptions that resulted in the incremental formation of Towada's 11-km-wide caldera. The thinner light- and dark-colored deposits above the Hachinohe ignimbrite were produced by post-caldera eruptions, the most recent of which took place in 915 CE.

Photo by Yukio Hayakawa (Gunma University).

Creative Commons Icon This image is made available under the Creative Commons BY-NC 4.0 license terms.

Keywords: stratigraphy | geology | tephra | ignimbrite | outcrop | geology


Towada