Mt.Taikanzan

Lets Get Some Hints as to the Composition of the　Hakone Volcano from the Surrounding Landscape!

The expansive scenery this geosite provides gives us the　chance to learn about the composition of the Hakone Volcano.

Formation model of the Hakone Volcano

①Around 400,000 to 230,000 years ago,The stratovolcanic group that forms the “somma” we see today is formed.

②Around 230,000 to 130,000 years ago, The caldera is formed through an eruption accompanying a massive pyroclastic flow.

③Around 130,000 to 80,000 years ago, The “Older Central Cone” is formed through eruptions where large amounts of lava stream out.

④Around 80,000 to 40,000 years ago, Once again, an eruption accompanying a massive pyroclastic flow occurs.

⑤From 40,000 years ago onwards, The “Younger Central Cone” is formed through an eruption of lava inside the caldera.