Oshima as an island stratovolcano with a large caldera on its summit. Stratovolcanoes are conical volcanoes built up by many layers of hardened lava and volcanic ash, with steep profiles and periodic eruptions.Know More
The main stratovolcano cone of the island has a base composed of basalt lava and pyroclastic rocks. When an erupting volcano empties a shallow magma chamber, the volcanic formation can collapse into the voided reservoir and produce a cauldron-like depression.
Based on geological evidence, it is estimated that Oshima has erupted over 100 times since 8450 B.C. As of 2014, the last eruption was in 1990 at the summit of Mihara-yama.Learn more about Volcanoes
Mount Hood is a stratovolcano, which typically have sharp peaks that are formed from coats of dried lava, volcanic ash and other volcanic elements. Mount Hood's formation specifically is the result of a subduction zone on the West Coast.Full Answer >
Mount Pinatubo is an active stratovolcano, or a cone-shaped volcano, that is made from many layers of hardened ash, lava and other volcanic rock. Stratovolcanoes are also called composite volcanoes.Full Answer >
Mt. Hekla is a stratovolcano that has been active for centuries. It's a very famous volcano in Iceland, with a height of 1,491 meters. Mt. Hekla has had five massive fissure eruptions in the last 7,000 years; the most recent fissure eruption was 2,800 years ago.Full Answer >
Mt. Kilimanjaro is a stratovolcano. A stratovolcano, also called a composite volcano, is tall and steep and has many layers of lava, tephra (what falls back through the air after an eruption) and ash. This is one of the most typical volcanoes.Full Answer >