Volcanoes Definition–noun, plural -noes, -nos. | 1. | a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals. | | 2. | 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. | |
From Dictionary
Related topics from BritannicaHawaii Volcanoes National Park
national park encompassing a volcanic area along the southeastern shore of Hawaii Island, U.S., southwest of Hilo. Established in 1961 and formerly a part of Hawaii National Park, it occupies an area ...
Indonesia
There are over 100 active volcanoes in Indonesia and hundreds more that are considered extinct. They run in a crescent-shaped line along the outer margin of the country, through Sumatra and Java as ...
volcano
Rift volcanoes form when magma rises into the gap between diverging plates. They thus occur at or near actual plate boundaries. Measurements in Iceland suggest that the separation of plates is a ...
volcano
Structures of this type are large, dome-shaped mountains built of lava flows. Their name derives from their similarity in shape to a warrior's shield lying face up. Shield volcanoes are usually ...
volcano
As an oceanic plate is subducted beneath a continental plate, seafloor sediments rich in water and carbon dioxide are carried beneath the overriding plate. These compounds may act as fluxes, reducing ...
volcano
These structures occur in various forms, but many are cone-shaped seamounts. Some ancient island volcanoes were eroded flat or covered with a coral cap at sea level before they sank below the sea ...
volcano
Topographic maps reveal the locations of large earthquakes and indicate the boundaries of the 12 major tectonic plates. For example, the Pacific Plate is bounded by the earthquake zones of New ...
mountain
A chain of volcanoes extends from mainland Alaska down the Alaska Peninsula along the Aleutian Islands and then southwestward down the peninsula of Kamchatka in northeastern Siberia and along the ...
volcano
Such structures are mixed landforms. In most cases, they occur because of changes either in eruptive habit or in location of the principal vent area. A stratovolcano may form a large explosion crater ...
volcano
Geothermal energy is plentiful, but geothermal power is not. Temperatures increase below the Earth's surface at a rate of about 30 C per km in the first 10 km (roughly 90 F per mile in the first 6 ...
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Related topics from Ask NewsVolcanoes May Be Original Womb of Life
Volcanoes May Be Original Womb of Life
Volcanoes may have provided sparks of first life
Volcanoes May Have Provided Sparks Of First Life
Did Volcanoes Spark Life on Earth?
Volcanoes forged surface of Mercury
Canada.com - Found Oct. 14, 2008
Images provided by Messenger from its Jan. 14 fly-by provide strong evidence that volcanoes played a critical role in forming Mercury's...
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Hawaii Homes and Volcanoes for sale
MyContentBuilder - Found Oct. 11, 2008
One of their highlights of the trip was visiting the Kilauea Volcanoes at the National Park, a 377 square mile park on Hawaii's Big Island, a...
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Natural Fireworks Continue at National Parks Volcanoes
Beaver County Times - Found Oct. 22, 2008
... protect a wide variety of volcanic landscapes, ranging from the largest volcano in the world at Hawaii Volcanoes National Park, to the smaller...
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Volcanoes turn up the heat and become harder to predict
Business Weekly UK - Found Oct. 7, 2008
New research conducted by a team of British and American scientists into volcanoes has found that they function in a far more complex way than
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Volcanoes May Have Provided Sparks and Chemistry for First Life
YubaNet - Found Oct. 18, 2008
Since the young Earth was still hot from its formation, volcanoes were probably quite common then.
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Related topics from Technorati |
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