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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]
[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 ...
Block flows, lava flows, lava domes and some ignimbrites of pumiceous composition form this composite volcano. [3] More than six lava domes and two major cones are part of this system and surrounded by a pyroclastic apron, [ 4 ] which covers a surface area of 300 square kilometres (120 sq mi) and is formed from many pyroclastic flows with a ...
Most of the volcanoes in the Oregon Cascades are either scoria cones, small shield volcanoes, or lava fields, though the segment contains a number of basaltic andesite stratovolcanoes such as Mount McLoughlin. [7] Black Butte is one such stratovolcano [4] (also known as a composite volcano), [9] with a mafic (rich in magnesium and iron ...
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
Location in Oregon relative to other major volcanoes. The major landmark for the Rogue River Valley, [4] Mount McLoughlin reaches an elevation of 9,493 feet (2,893 m). [1] The tallest volcano in between Mount Shasta — located 70 miles (110 km) to the south [5] — and South Sister 120 miles (190 km) to the north, it lies in the Cascade Range, in the southern portion of the U.S. state of ...
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Osorno volcano in Chile is an example of a well-developed stratocone.. Stratocones are large cone-shaped volcanoes made up of lava flows, explosively erupted pyroclastic rocks, and igneous intrusives that are typically centered around a cylindrical vent.