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WordNet-Online
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Definitions from the WebTypes of VolcanoDescription:A volcano is a natural landform that erupts molten rock, gases, and other materials generated by the Earth's internal heat. There are different types of volcanoes based on their characteristic shape, eruption style, and the type of lava they release. Senses:1. Shield VolcanoA shield volcano is a broad, gently sloping volcanic mountain characterized by fluid basaltic lava flows. These eruptions are usually non-explosive and result in the gradual build-up of a broad shield-shaped volcano over time. Shield volcanoes are typically found on hotspots, such as the Hawaiian Islands. Example sentence: The shield volcano, Mauna Loa, in Hawaii, is one of the largest volcanoes on Earth. 2. Composite Volcano (Stratovolcano)A composite volcano, also known as a stratovolcano, is a tall conical mountain formed by alternating layers of pyroclastic material and solidified lava. These volcanoes tend to have explosive eruptions due to the high viscosity of their lava. Famous examples of composite volcanoes include Mount Fuji in Japan and Mount St. Helens in the United States. Example sentence: The picturesque Mount Fuji is an iconic composite volcano, attracting hikers and tourists from around the world. 3. Cinder Cone VolcanoA cinder cone volcano is a small, steep-sided volcanic cone built from the accumulation of loose cinders and other pyroclastic material expelled during explosive eruptions. These volcanoes often have a bowl-shaped crater at the summit and are generally found on the flanks of larger volcanoes. Parícutin in Mexico is a well-known cinder cone volcano. Example sentence: The cinder cone volcano of Parícutin unexpectedly formed in a cornfield, fascinating scientists and locals alike. 4. Lava DomeA lava dome is a rounded bulge of highly viscous lava that forms at the vent of a volcano. When magma is too thick to flow easily, it may accumulate and solidify near the vent, creating a dome-shaped feature. Lava domes are often associated with explosive volcanic eruptions and can grow over time. The Mount St. Helens eruption in 1980 produced a prominent lava dome. Example sentence: The lava dome created after the eruption of Mount St. Helens continues to grow as new magma rises to the surface. 5. Fissure VolcanoA fissure volcano, also known as a fissure vent or volcanic fissure, is a linear volcanic vent through which lava erupts, often without a central crater. These eruptions commonly occur along tectonic plate boundaries and can have massive lava flows extending over vast distances. The Eldfell volcano on Heimaey Island, Iceland, resulted from a fissure eruption. Example sentence: The Eldfell fissure volcano in Iceland erupted violently, causing the evacuation of the entire island's population. Related Products: | ||||
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