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A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers of hardened lava and tephra. [1] Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and explosive eruptions. [2] Some have collapsed summit craters called calderas. [3]
Mayon Volcano in Albay, The most active volcano in the Philippines, famous for its perfect symmetrical cone shape. Mount Pinatubo in Zambales. The catastrophic June 1991 eruption, which formed a caldera, later filled by a crater lake, had global environmental effects. Mount Bulusan in Sorsogon; Mount Kanlaon and Mount Talinis in Negros
Mount Katmai (Russian: Катмай) is a large active stratovolcano (composite volcano) on the Alaska Peninsula in southern Alaska, located within Katmai National Park and Preserve. It is about 6.3 miles (10 km) in diameter with a central lake-filled caldera about two by three miles (3.2 by 4.8 km) in size, formed during the Novarupta eruption ...
A complex volcano, also called a compound volcano or a volcanic complex, is a mixed landform consisting of related volcanic centers and their associated lava flows and pyroclastic rock. [1] They may form due to changes in eruptive habit or in the location of the principal vent area on a particular volcano. [ 2 ]
Aira caldera is one of the most active and hazardous calderas in the world. It is home to the Kirishima volcanoes, a group of active volcanoes at the north end of Aira caldera. One of these volcanoes, Shinmoedake, has produced two strong magmato-phreatic eruptions, separated by almost 300 years. Starting in December 2009, active diving and ...
The most important types of volcanic mountain are composite cones or stratovolcanoes and shield volcanoes. [10] [11] A shield volcano has a gently sloping cone because of the low viscosity of the emitted material, primarily basalt. Mauna Loa is the classic example, with a slope of 4°-6°.
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[10]: 3–4 It is usually described as a composite volcano which is the same as a stratovolcano. [1] [11] It is separate from the present potentially active fissure swarms and central volcanoes nearby and is believed to be inactive. Its original magma reservoirs are believed to have been at 9–11 km (5.6–6.8 mi), and 15–18 km (9.3–11.2 ...
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