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volcanic ash [väl′kan·ik ′ash]

(geology)

Fine pyroclastic material; particle diameter is less than 4 millimeters.

Volcanic Ash

an incorrect but widespread name for a product of the natural pulverization of magma; it consists of a mixture of dust and sand, with a particle size less than 2 mm. Admixtures of foreign rocks are characteristic. It occurs as a result of the atomization of liquid or solid lavas of various compositions.

Depending on the size of the particles, the force of the eruption, and the wind, volcanic ash can settle at significant distances from the place of the eruption. Thus, for example, during the explosion of Bezymiannyi Volcano (on Kamchatka) in 1956, ash floated as far as Great Britain, and during the explosion of Krakatoa (Indonesia) in 1883, the smallest volcanic dust particles floated almost twice around the world.

Volcanic ash is used to make light concretes, glass for containers, cement, thermal-insulation material, and filtration material. It is also used as a medium for growing plants.

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No references found	Mar 29, 2009 Alaska Airlines Alaska Airlines resumed flights in and out of Alaska this afternoon following the clearing of ash clouds from Mount Redoubt. Airline News - North America by Airguide Online Latest eruption at Alaska's Mount Redoubt spews ash ANCHORAGE, Alaska -- Alaska's Mount Redoubt has erupted again, spewing an ash cloud 50,000 feet up into the air. IN BRIEF by The Santa Fe New Mexican (Santa Fe, NM) Although no injuries have been reported, ash clouds have forced a string of flight cancellations and prompted concern in nearby towns. Alaska volcano in fresh explosion by AFP / AFP American Edition	Aselloidea Asellota Asellus Aquaticus Asen Asen Khristov Kiselinchev Asenath Asenkova, Varvara Asenkova, Varvara Nikolaevna Asenovgrad Asepsis aseptic aseptic meningitis Aser asetigerous asexual asexual reproduction ASF Asgard Asgeir Asgeirsson Ásgeir Ásgeirsson Asgeirsson, Asgeir Ásgeirsson, Ásgeir Asger Hamerik Ash Ash Can school Ash cloud ash collector ash cone ash content ash conveyor ash dump ash fall ash field ash flow ash furnace ash fusibility Ash Hollow State Historical Park ash house Ash Meadows National Wildlife Refuge ash pan ash pit ash pit door ash plain Ash Removal ash rock ash shower ash viscosity Ash Wednesday Ash'ari, Abu al-Hasan al- Ash'ariyyah Ash, Roy L.	ASGU ASGV ASGVO ASGW ASGWC ash ash ash ash ash Ash (botany) Ash (botany) Ash (letter) Ash (letter) Ash (Tree) Ash (Tree) Ash (volcanic) Ash (volcanic) Ash And Misty Love Ash and Misty Romance Novel ash bin ash bin ash blond ash blonde ash cake Ash Can Ash Can School Ash Can School Ash Cash Ash Catchem Ash cloud ash collector Ash cone Ash cone ash content ash conveyor Ash Creek Boer Goats ash dump Ash fall Ash fall ash field Ash flow Ash Fork Public Library Ash Free Dry Mass ash furnace ash fusibility Ash gourd ash gray ash grey Ash Hollow Cave Ash Hollow State Historical Park Ash Hollow, Nebraska ash house Ash Ketchum ash leaf lesion Ash Made Our Eyes Ash Maple

Mar 29, 2009 Alaska Airlines Alaska Airlines resumed flights in and out of Alaska this afternoon following the clearing of ash clouds from Mount Redoubt.

Airline News - North America by Airguide Online

Latest eruption at Alaska's Mount Redoubt spews ash ANCHORAGE, Alaska -- Alaska's Mount Redoubt has erupted again, spewing an ash cloud 50,000 feet up into the air.

IN BRIEF by The Santa Fe New Mexican (Santa Fe, NM)

Although no injuries have been reported, ash clouds have forced a string of flight cancellations and prompted concern in nearby towns.

Alaska volcano in fresh explosion by AFP / AFP American Edition

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Volcanic Ash (redirected from Ash cloud)

Volcanic Ash
(redirected from Ash cloud)