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volcano
[ vol-key-noh ]
noun
- a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals.
- a mountain or hill, usually having a cuplike crater at the summit, formed around such a vent from the ash and lava expelled through it.
volcano
/ vɒlˈkeɪnəʊ /
noun
- an opening in the earth's crust from which molten lava, rock fragments, ashes, dust, and gases are ejected from below the earth's surface
- a mountain formed from volcanic material ejected from a vent in a central crater
volcano
/ vŏl-kā′nō /
- An opening in the Earth's crust from which lava, ash, and hot gases flow or are ejected during an eruption.
- A usually cone-shaped mountain formed by the materials issuing from such an opening. Volcanoes are usually associated with plate boundaries but can also occur within the interior areas of a tectonic plate. Their shape is directly related to the type of magma that flows from them—the more viscous the magma, the steeper the sides of the volcano.
- ◆ A volcano composed of gently sloping sheets of basaltic lava from successive volcanic eruptions is called a shield volcano . The lava flows associated with shield volcanos, such as Mauna Loa, on Hawaii, are very fluid.
- ◆ A volcano composed of steep, alternating layers of lava and pyroclastic materials, including ash, is called a stratovolcano . Stratovolcanos are associated with relatively viscous lava and with explosive eruptions. They are the most common form of large continental volcanos. Mount Vesuvius, Mount Fuji, and Mount St. Helens are stratovolcanos.
- Also called composite volcano
- See more at hot spot
volcano
- A cone-shaped mountain or hill created by molten material that rises from the interior of the Earth to the surface.
Notes
Word History and Origins
Word History and Origins
Origin of volcano1
Example Sentences
The owners of a New Zealand volcano that erupted in 2019, killing 22 people, have had their conviction over the disaster thrown out by the country's High Court.
The pea-sized chunks of black glass were found inside the skull of the victim, aged about 20, who died when the volcano erupted in 79 AD near modern-day Naples.
"It feels like something is settling down there. Everything we admire about Santorini today - the beauty, the character - has been shaped by the volcano and its seismic forces."
Santorini lies on the Hellenic Volcanic Arc - a chain of islands created by volcanoes.
Firefall reservations are designed to limit erosion and damage to the environment as visitors clamor to see El Capitan when it resembles an active volcano.
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