TYPES OF VOLCANOES AND HOW THEY ARE FORMED
Types of Volcanoes in Tokyo
Three types of volcanoes in or around Tokyo are Calderas, Shield, and Stratovolcanoes.
How These Volcanoes are Formed
The formation of a Calderas Volcano is by the collapse of land following a volcanic eruption.
Three types of volcanoes in or around Tokyo are Calderas, Shield, and Stratovolcanoes.
How These Volcanoes are Formed
The formation of a Calderas Volcano is by the collapse of land following a volcanic eruption.
The formation of a Shield volcano is when molten magma shoots upward from deep below the ocean floor and breaks through the drifting plates to form shield volcanoes.
The formation of a Stratovolcano or Composite volcano is when magma rises and water is trapped both in hydrated minerals and in the porous basalt rock of the upper oceanic crust. Then it is released into mantle rock of the asthenosphere above the sinking oceanic slab. The release of water from hydrated minerals is termed "dewatering," and occurs at specific pressures and temperatures for each mineral, as the plate descends to greater depths. There are many composite volcanoes located in Japan such as Mount Fuji.