Stratovolcano
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A stratovolcano is a tall, conical mountain (volcano) composed of both hardened lava and volcanic ash. The shape of these volcanos is characteristically steep in profile because the lava flows that formed these volcanos were highly viscous, and so cooled and hardened before spreading very far. Such lava are classed as acidic to be high in silica. At the other end of the spectrum are shield volcanoes (such as Mauna Loa in Hawaii), which are formed from less viscous, basic lavas (high in metals such as magnesium and iron), giving them a wide base and more gently sloping profile. Many stratovolcanos exceed a height of 2500 m. They are often created by subduction of tectonic plates.
Although stratovolcanoes are sometimes called composite volcanoes, volcanologists prefer to use the term stratovolcano to distinguish among volcanoes because all volcanoes of any size have a composite (layered) structure — that is, are built up from sequential outpourings of eruptive materials.
Examples
- Aragats, Armenia
- Ağrı Dağı, Turkey
- Barren Island (Andaman Islands) - The only active volcano in the Indian subcontinent
- Beerenberg, Jan Mayen - The world's northernmost volcano
- Cotopaxi in Ecuador
- Mount Elbrus Caucasus, Russia
- Mount Erebus in Antarctica
- Mount Etna in Italy
- Mount Fuji in Japan
- Mount Hood in northern Oregon, United States
- Kazbek, Caucasus, Georgia
- Kollóttadyngja in North-East Iceland
- Lanín in the border between Argentina and Chile.
- Mayon Volcano in the Philippines
- El Misti near Southern Peru's city of Arequipa
- Mount Pelée in Martinique in the Caribbean
- Mount Pinatubo in Zambales province, the Philippines
- Mount Rainier in north-central Washington, United States
- Mount Ruapehu on New Zealand's North Island
- Santa Ana near San Blas, El Salvador
- Mount Shasta in northern California, United States
- Soufriere Hills volcano on the Caribbean island of Montserrat
- Mount Spurr in Alaska, United States
- Mount St. Helens in southern Washington, United States
- Mount Tambora Sumbawa Island, Indonesia
- Mount Taranaki (or Mount Egmont) on New Zealand's North Island
- Mount Usu Hokkaido, Japan
- Teide Tenerife, Canary Islands, Spain
- Trölladyngja in northeast Iceland
- Mount Vesuvius Naples, Italy
- Nisyros, in the Aegean Sea
External link
de:Schichtvulkan et:Kihtvulkaan fr:Stratovolcan is:Eldkeila nl:Stratovulkaan no:Stratovulkan sk:Stratovulkán sv:Stratovulkan