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Genbudo

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description Genbudo Overview

Genbudo is a cave formed in columnar basalt in Toyooka, Hyogo Prefecture, Japan, designated as a national natural monument in 1931. The hexagonal basalt columns formed during a volcanic eruption approximately 1.6 million years ago. Studies of the basalt's magnetic properties contributed to understanding geomagnetic reversal timelines. The site includes five caves, with Genbudo being the largest and most accessible to visitors.

help Genbudo FAQ

Where in Japan is the Genbudo cave located?

Genbudo is a famous sea-cave located in Toyooka, Hyogo Prefecture, Japan. It was officially designated as a national natural monument in 1931 due to its unique geological features.

What makes the basalt columns at Genbudo geologically significant?

The cave features striking hexagonal columnar basalt formed during a volcanic eruption roughly 1.6 million years ago. It is particularly famous in the scientific community because studies of the basalt's magnetic properties contributed to the discovery of geomagnetic reversals.

Can visitors go inside Genbudo cave today?

Yes, Genbudo Park is open to the public, allowing tourists to walk right up to the impressive columnar basalt formations. The site is conveniently located near the Genbudo Station, making it easily accessible for sightseers.

When did the volcanic eruption that formed Genbudo occur?

The volcanic eruption that created the basaltic rock of Genbudo occurred approximately 1.6 million years ago. Over millennia, the cooling and cracking of the lava formed the distinct hexagonal pillars visible today.

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