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Topic: Volcanic bomb

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	Volcanic bomb - Wikipedia, the free encyclopedia
		A volcanic bomb is a globule of molten rock (tephra) larger than 2.5 inches (64 mm) in diameter, formed when a volcano ejects viscous fragments of lava during an eruption.
		Lava bombs can be thrown many kilometres from an erupting vent, and often acquire aerodynamic shapes during their flight.
		Volcanic bombs are a significant volcanic hazard, and can cause severe injuries and death to people in an eruption zone.
	en.wikipedia.org /wiki/Volcanic_bomb (197 words)

	Bomb - Biocrawler (Site not responding. Last check: 2007-10-08)
		Although a bomb may be delivered by being thrown or may be concealed in a car or truck or by the roadside, the usual method of delivering bombs to their target is by dropping them from a bomber airplane.
		Bombing may be directed at military targets such as ships or armament factories or at civilian targets such as office buildings or cities.
		Bombing of particular targets such as ships, tanks is called tactical bombing; bombing of areas such as military bases or cities is called strategic bombing.
	www.biocrawler.com /encyclopedia/Bomb (718 words)

	Bomb article - Bomb water bombs volcanic bombs Bomb explosive material clock remote - What-Means.com (Site not responding. Last check: 2007-10-08)
		The explosion of the bomb has to be triggered, usually by a clock, a remote control, or some kind of sensor, usually pressure (altitude), radar, or contact.
		Bombs are first and foremost weapons; the term "bomb" is not usually applied to explosive devices used for civilian purposes (such as construction or mining).
		By contrast, terrorist bombs are usually custom-made, developed to any number of designs, use a wide range of explosives of varying levels of power and chemical stability, and are used in many different ways.
	www.what-means.com /encyclopedia/Bomb (349 words)

	Amateur Geologist Geological Glossary - V
		Elements that are soluble in magma at elevated pressure and temperature that exsolve as gas from magmas during ascent and eruption at the earth's surface.
		A mixture of volcanic ash and gases that moves downhill as a density current in the atmosphere.
		Volcanic necks (also called plug) are usually more resistant to erosion than the material making up the surrounding cone and may remain standing as a solitary pinnacle when the rest of the original structure has eroded away.
	www.amateurgeologist.com /content/glossary/glossary_v.html (868 words)

	Amateur Geologist Structured Geological Glossary: Igneous Rocks
		Light-colored, frothy volcanic rock, usually of dacite or rhyolite composition, formed by the expansion of gas in erupting lava and so filled with vesicle that it resembles a sponge and is very light.
		Volcanic rock (or lava) that characteristically is light in color and contains 62 to 69 percent silica and moderate amounts of sodium and potassium.
		Volcanic rock (or magma) that is generally dark in color, contains 45 to 54 percent silica, and is rich in iron and magnesium.
	www.amateurgeologist.com /content/glossary/rock/igneous.html (4089 words)

	Craters of the Moon NM & Preserve: Illustrated Glosssary of Volcanic Terms (Site not responding. Last check: 2007-10-08)
		The shape of a bomb is determined by the viscosity of the magma, velocity and length of flight, the rate at which the lava cooled, the rate of expansion of gases, and the type of deformation that occurred upon impact.
		Also known as a volcanic sink, is a circular-shaped depression with steep to vertical walls that formed by collapse of the ground that results from the removal of support such as from the withdrawal of the underlying magma.
		Volcanic bombs with a twisted shape; spindle bombs form from blobs of fluid lava that often take on a smooth stoss side (front side), a rougher lee side (backside) marked by ribs and fluting caused by frictional resistance to air, and have prominent, usually twisted, projections on either side that form as ribbon bombs separate.
	www.nps.gov /crmo/glossary (1385 words)

	Bomb - Voyager, the free encyclopedia (Site not responding. Last check: 2007-10-08)
		Some bombs are equipped with a parachute, such as the World War Two "parafrag" (an 11kg {25pd} fragmentation bomb), the Vietnam-era daisy cutters, and the bomblets of some modern cluster bombs.
		In the case of suicide bombing the bomb is often carried by the attacker on his or her body.
		The explosion of the bomb has to be triggered by a detonator (fuse/fuze), usually by a clock, a remote control, or some kind of sensor, usually pressure (altitude), radar, or contact.
	www.voyager.in /Bomb (979 words)

	bomb - definition by dict.die.net
		Bomb ketch, Bomb vessel (Naut.), a small ketch or vessel, very strongly built, on which mortars are mounted to be used in naval bombardments; -- called also mortar vessel.
		Bomb lance, a lance or harpoon with an explosive head, used in whale fishing.
		Volcanic bomb, a mass of lava of a spherical or pear shape.
	dict.die.net /bomb (338 words)

	Craters of the Moon NM: General Management Plan (Site not responding. Last check: 2007-10-08)
		In central eruptions, volcanic materials are emitted from a central vent or pipe and ordinarily form a volcanic cone; in fissure eruptions, lava or pyroclastic materials emanate from a relatively narrow fissure, generally building lava plains and plateaus.
		The soft lava bomb tumbles and spins as it flies, acquiring a characteristic twisted tear shape.
		volcanic rift zone: A concentration of volcanic landforms and structures along a linear zone of cracks in the earth's crust.
	www.nps.gov /crmo/gmpac.htm (580 words)

	Volcanic Bombs (Site not responding. Last check: 2007-10-08)
		The photographs that follow are of volcanic bombs that have a somewhat streamlined shape and were generally ejected during the final stages of the volcanic eruption.
		Commonly the core of core bombs is an older fragment of the volcano, e.g., a piece of basalt.
		Often, the bomb and the ears are part of a much larger ribbon bomb in which the delicate ribbons separate as the fluid mass flies through the air or break off on impact.
	www.gc.maricopa.edu /earthsci/imagearchive/bombs.htm (917 words)

	Geoscience - The Earth - Shaping the Earth - Volcanism and volcanic rocks
		The pyroclastic material erupted from an explosive volcanic eruption may be ejected as fragments, resulting in scoria cones or ash fall deposits, or charge outwards in ash flow deposits.
		The finer materials of explosive volcanic eruptions are ejected into the air, eventually falling to the ground to form a layer of ash.
		Blocks are angular fragments of solid rock whereas bombs are fragments flung from volcanic vents as pasty blobs of magma that were streamlined as they solidified during their flight.
	www.amonline.net.au /geoscience/earth/volcanism.htm (2940 words)

	Volcano Dictionary: V - EnchantedLearning.com
		Volcanic ash is a harsh abrasive type of ash (unlike ash from a wood fire) that is made up of small rock, mineral, and volcanic glass fragments (these fragments are less than 0.1 inch (2 mm) in diameter).
		A volcanic bomb is a chunk of viscous lava (over 64 mm) that is ejected (thrown) from a volcano.
		Volcanic dust is a solidified lava that is tiny particles.
	www.enchantedlearning.com /subjects/volcano/glossary/indexv.shtml (463 words)

	Volcanic Features of Victoria (Site not responding. Last check: 2007-10-08)
		The volcanic plains of the Western District of Victoria (Australia) are Recent in age and illustrate a variety of well preserved terrestrial volcanic landforms.
		Volcanic bomb sag in tuffs at the Lake Purdiguluc maar
		The volcanic plains of the western Victoria have numerous conical hills that comprise scoria cones.
	members.iinet.net.au /~boxer/WesternDistrict.htm (706 words)

	Views of the National Parks
		Volcanic smog, called "vog" for short, is a hazardous mix of carbon dioxide, sulfur dioxide and other volcanic gases that can collect downwind of a volcano and cause a persistent air pollution problem.
		This saturation is caused by heavy rainfall on volcanic deposits, sudden melting of snow and ice near volcanic vents from radiant heat on the flank of a volcano or from pyroclastic flows, or from water released in the breakout of glaciers and crater lakes.
		The effects of volcanic emissions on atmosphere and climate changes are measured and monitored by instruments on satellites.
	www2.nature.nps.gov /views/KCs/Volcanism/HTML/ET_02_Erupt.htm (1950 words)

	Global Volcanism Program \| Yasur \| Activity Reports
		The only bomb observed to be thrown over the crater rim was sampled while still hot, and has a composition similar to that of bombs ejected in 1934 and 1975.
		The mass discharge rate of volcanic gases was not measured but our visual comparison of plume size with other volcanoes suggests that the Yasur discharge rate was between 400 and 800 tons/day SO This output and gas composition are typical of other volcanoes around the Pacific rim.
		Yasur's vent A in the midst of a dense emission of bombs and ash.
	www.volcano.si.edu /world/volcano.cfm?vnum=0507-10=&VErupt=Y&VSources=Y&VRep=Y&VWeekly=Y&volpage=var (10553 words)

	VOLCANIC HAZARDS (Site not responding. Last check: 2007-10-08)
		The volcanic hazard map of Gede volcano is based on the main hazardous eruptive products when the eruption occurred, namely lava flow, pyroclastic flow or nuee ardente, lapilli, incandescent bomb, coarse to fine sand, ash and rain lahar.
		Others hazardous volcanic eruption products are volcanic bomb, lapilli, coarse to fine sand and volcanic ash that can reach about 5 km from the eruption center.
		Another volcanic hazard is volcanic bomb, lapilli, pyroclastic fall, and volcanic ash that reach about 5 km from the eruption center.
	www.vsi.esdm.go.id /volcanoes/gede/hazards.html (531 words)

	Geoscience - The Earth - Shaping the Earth - Classification of igneous rocks
		Bomb: a volcanic projectile with an average diameter greater than 64 mm and whose shape or surface indicates that it was partially or completely molten during its formation and transport through the air.
		Kimberlite: a volcanic or subvolcanic rock composed largely of serpentinised olivine, with variable amounts of phlogopite mica, orthopyroxene, clinopyroxene, carbonate and chromite.
		Lamproite: a volcanic or subvolcanic rocks that are rich in potassium and magnesium, composed of unusual rare minerals such as K-Ti-richterite, priderite, wadeite, jeppeite, Fe-orthoclase and leucite.
	www.amonline.net.au /geoscience/earth/igneousclass.htm (1419 words)

	card 7 EXTRUSIVE IGNEOUS ROCKS (Site not responding. Last check: 2007-10-08)
		Extrusive (volcanic) igneous rocks form when molten rock erupts from Earth's interior through a volcano or fissure and cools rapidly at the surface.
		Such rapid cooling of lava, molten rock at the surface, generally does not allow mineral crystals to grow large enough to be seen with the unaided eye, so extrusive rocks are usually fine-grained (also called aphanitic) in their texture.
		All airborne volcanic fragments, referred to as pyroclasts, eventually fall to the surface where they weld together due to their high temperature, or simply compact together to form rock.
	seis.natsci.csulb.edu /basicgeo/EXTRUSIVE/EXTRUSIVE.html (502 words)

	Chapter Voider <i>to</i> Voltaplast of V by Webster's Dictionary (1913 Edition)
		Of or pertaining to a volcano or volcanoes; as, volcanic heat.
		The act of volcanizing, or the state of being volcanized; the process of undergoing volcanic heat, and being affected by it.
		To subject to, or cause to undergo, volcanic heat, and to be affected by its action.
	www.bibliomania.com /2/3/257/1213/24466/3.html (406 words)

	::Hacettepe Üniversitesi Jeoloji Mühendisliği Bölümü:: (Site not responding. Last check: 2007-10-08)
		volcanic earthquakes - Earthquakes caused by movements of magma or explosions of gases during volcanic activity.
		volcanic eruption - Explosive or quiet emission of lava, pyroclastics, or volcanic gases at earth's surface, usually from volcano but rarely from fissures.
		May be caused by uplift due to volcanism or to compression.
	www.jeomuh.hacettepe.edu.tr /jeoweb/sozluk/v-w.htm (548 words)

	Geology Dictionary - Volcanic Ash, Bomb, Neck - GEOLOGY.COM
		Sand-sized particles of igneous rock that form when a spray of liquid magma is blown from a volcanic vent by escaping gas.
		A projectile of hot magma or rock that is blown from the vent during a volcanic eruption.
		A steep-sided extrusion of very viscous lava that is squeezed from a volcanic vent without major eruption.
	geology.com /dictionary/glossary-v.shtml (505 words)

	Volcano
		A mountain, usually conical in shape, known to be volcanically dormant, or in activity, with magma of molten rock or gases erupting to the surface through an opening on the earth's crust.
		Volcanic cones are usually smaller features composed of loose ash and cinder, with occasional masses of stone which have been tossed violently into the air by the eruptive forces (and are thus called ejecta).
		Volcanic activity is often accompanied by earthquakes, hot springs, fumaroles, solfatare and geysers.
	www.websters-online-dictionary.com /definition/volcano (3441 words)

	FanFiction.Net : Dictionary & Thesaurus (Site not responding. Last check: 2007-10-08)
		in which icons of little fl-powder bombs or mushroom clouds are displayed, indicating that the system has died.
		Atari ST and Macintosh equivalents of a Unix "panic" or Amiga guru, icons of little fl-powder bombs or mushroom clouds are displayed">in which icons of little fl-powder bombs or mushroom clouds are displayed, Macintosh">indicating that the system has died.
		Logic bombs are triggered by an event whereas time bombs are triggered either after a set amount of time has elapsed">similar to the Amiga guru meditation number.
	www.fanfiction.net /dictionary.php?word=bomb (484 words)

	totalstone igneous
		this is an agglomerate, these are formed by fragments of glass, rock or crystals,directly generated from explosive volcanic action, it may contain fragments torn from the sides of the volcano, as lava is ejected and cools in flight, the glassy exterior cracks with the sudden release of gases.
		the basics of volcanic igneous rocks, these are found on earth and the moon, in abundance, dating back more than three billion years.
		rapid cooling has formed this rock into volcanic glass, with less than one per cent water, when it is fractured it leaves shell like rings, we call conchoidal.found in fl, green, or red.
	www.totalstone.8m.com /subign.html (612 words)

	USGS Photo Glossary: bomb
		These basaltic lava bombs were erupted by Mauna Kea Volcano, Hawai`i.
		Volcanic bombs are lava fragments that were ejected while viscous (partially molten) and larger than 64 mm in diameter.
		Volcanic bombs include breadcrust bombs, ribbon bombs, spindle bombs (with twisted ends), spheroidal bombs, and "cow-dung" bombs.
	volcanoes.usgs.gov /Products/Pglossary/bomb.html (78 words)

	Glossary
		A small hole formed in a volcanic rock by a gas bubble that became trapped as the lava solidified.
		Volcanic bombs range from a few millimeters to more than a meter in diameter.
		A curved chain of volcanic islands parallel to a deep-sea trench where oceanic lithosphere is subducted causing volcanism and the origin of volcanic islands.
	imnh.isu.edu /digitalatlas/glossary/letter.asp?letter=V (552 words)

	awu (Site not responding. Last check: 2007-10-08)
		Ejected rocks are volcanic rock fragments, in the form of volcanic bomb or volcanic blocks which are ejected during eruptions.
		Dry volcanic as falls are rain of loose air fall material of clay to sand sizes.
		This area is located near or around the volcanic hazard source comprises the summit area and its surrounding, 5 km is radius from the active crater, several valleys and rivers originating from the summit area.
	www.vsi.esdm.go.id /volcanoes/awu/hazards.html (1196 words)

	bomb
		Harvester Company of Chicago, the massacre of the strikers, and the judicial murder of the labor leaders, which followed upon the historic Haymarket bomb explosion.
		knowledge of men as well as of phrases, would not have asked for any explanation, knowing that a man's philosophy is, in its relation to a man's life, a good deal less important than the fuse is to a bomb.
		He would have known that a scheme of philosophy no more brings wisdom into a man's life than a telescope brings the moon nearer to the earth.
	www.cooldictionary.com /words/bomb.word (469 words)

	Comments for: Friday night topic: The death of Christmas - ja.zz
		Hawaiian volcanism is typically cited as resulting from a mantle plume, most investigators now conceding that excess 40Ar* in the lavas, including those from the active Loihi and Kilauea volcanoes, is indicative of the mantle source area from which the magmas came.
		This is not only true for recent and young volcanics, but for ancient volcanics such as the Middle Proterozoic Cardenas Basalt of eastern Grand Canyon.16 In the mantle, this 40Ar* predominantly represents primordial argon that is not derived from in situ radioactive decay of 40K and thus has no age significance.
		Also, when samples of volcanic rocks are analyzed for K-Ar and Ar-Ar "dating," the investigators can never really be sure therefore that whatever 40Ar* is in the rocks is from in situ radioactive decay of 40K since their formation, or whether some or all of it came from the mantle with the magmas.
	techreport.com /ja.zz?id=32623 (1173 words)

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