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Mt.Taikanzan

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

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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

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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.