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Topic: Shield volcano

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	Wikipedia: Shield volcano
		A shield volcano is a volcano that, because of its domical shape, resembles a warrior's shield.
		Shield volcanoes are formed by lava of low viscosity that flows easily; consequently, the volcanic dome is built up over time by flow after flow of fluid basaltic lava that issues from vents or fissures on the surface of the volcano.
		On Earth, as most volcanoes are moving away from the source of their magma, the volcanoes grow less massive than would otherwise be the case.
	www.factbook.org /wikipedia/en/s/sh/shield_volcano.html (265 words)

	USGS Photo Glossary: Shield volcano
		View of the NNW flank of Mauna Loa Volcano from the south side of Mauna Kea Volcano, Hawai`i; both are shield volcanoes.
		Volcanoes with broad, gentle slopes and built by the eruption of fluid basalt lava are called shield volcanoes.
		Of the 1,511 volcanoes known to have erupted in the past 10,000 years, 164 are shield volcanoes.
	volcanoes.usgs.gov /Products/Pglossary/ShieldVolcano.html (324 words)

	Martian Volcanoes
		One of the reasons volcanoes of such magnitude were able to form on Mars is because the hot volcanic regions in the mantle remained fixed relative to the surface for hundreds of millions of years.
		It is possible that volcanoes of such magnitude were able to form on Mars because the hot volcanic regions in the mantle remained fixed relative to the surface for hundreds of millions of years.
		Both the plains and the volcano are cut by a graben, indicating tectonic activity subsequent to the emplacement of the plains.
	www.solarviews.com /eng/marsvolc.htm (2530 words)

	Shield volcano - Wikipedia, the free encyclopedia
		Mauna Kea, a shield volcano, on the Island of Hawai‘i with a light dusting of snow.
		Shield volcanoes in the Hawaiian Islands erupt magma as hot as 1,200 °C (2,200 °F), compared with 850 °C (1,560 °F) for most continental volcanoes, which are usually composed of acidic lava.
		On Earth, because of plate tectonics, hotspot volcanoes eventually move away from the source of their magma and the volcanoes are individually less massive than might otherwise be the case.
	en.wikipedia.org /wiki/Shield_volcano (385 words)

	Geo112 Volcanos lecture
		Shield volcanos gained their name from the fact that their profile against the horizon looks like a shield laying on the ground.
		Shield volcanos are the largest volcanic features on earth - the largest shield volcano, Mauna Loa in the Hawaiin Islands, has a volume 300 times greater than that of the largest stratovolcano, Mount Fuji in Japan.
		Shield volcanos are created through the eruption of basaltic magmas, which flow easily and thus are capable of flowing over the landscape many miles from the central fissures or vents.
	www.geology.wisc.edu /courses/g112/volcano.html (1977 words)

	Vol_Volcanoes
		Shield volcanoes form when low viscosity lavas are produced from a vent during mild eruptions.
		Cinder cone (or tephra) volcanoes are the smallest and simplest type of volcano (rarely exceed ~ 400 m in height).
		Cinder cones are readily eroded and often occur on the slopes of larger shield volcanoes or stratovolcanoes.
	www.mhhe.com /earthsci/geology/mcconnell/volcanoes/vol.htm (930 words)

	types of volcanoes1
		So when most people think of a volcano, they usually conjure up the Hollywood version: a huge, menacing conical mountain that explodes and spews out masses of lava which falls on rampaging dinosaurs, screaming cave people, or fleeing mobs of betogaed Romans--depending on their favorite volcano disaster movie.
		A third easily recognized volcano may be familiar to you from news reports from Hawaii: the "shield" volcano.
		Mauna Loa, a shield volcano on the "big" island of Hawaii, is the largest single mountain in the world, rising over 30,000 feet above the ocean floor and reaching almost 100 miles across at its base.
	www.cotf.edu /ete/modules/volcanoes/vtypesvolcan1.html (384 words)

	Shield Volcanoes
		Shield volcanoes may be produced by hot spots which lay far away from the edges of tectonic plates.
		Shields also occur along the mid-oceanic ridge, where sea-floor spreading is in progress and along subduction related volcanic arcs.
		The eruptions of shield volcanoes are characterized by low-explosivity lava-fountaining that forms cinder cones and spatter cones at the vent.
	library.thinkquest.org /17457/volcanoes/types.shield.php (114 words)

	Field Trip to Mars - Kids - Types of Volcanoes
		Volcanoes are grouped into cinder cones, composite volcanoes, shield volcanoes and lava domes.
		Shield volcanoes are volcanoes shaped like a bowl or shield in the middle with long gentle slopes made by basaltic lava flows.
		The volcanoes that formed the basalt of the Columbia Plateau were shield volcanoes as well as Kilauea in Hawaii (left) and Olympus Mons on Mars.
	www.kidscosmos.org /kid-stuff/kids-volcanoes-types.html (813 words)

	volcano (Site not responding. Last check: 2007-11-05)
		Shields of this size are made up of a number of separate volcanoes; for instance Kilauea and Hualalai are mere flank volcanoes on Mauna Loa.
		Studies of the geologic history of a volcano are generally necessary to make an assessment of the types of hazards posed by the volcano and the frequency at which these types of hazards have occurred in the past.
		Still, if people living around volcanoes are aware of some of the precursor phenomena that occur, they may be able to communicate their findings of anomalous events to scientists who can begin monitoring on a regular basis and help prevent a pending disaster.
	earthsci.org /processes/geopro/volc/volc.html (8257 words)

	Shield volcanoes. Photos and brief explanation (Site not responding. Last check: 2007-11-05)
		Shield volcanoes are volcanoes that mainly erupt fluid (usually basaltic) lava flows that are able to travel over long distances and thus construct over time broad, gentle slopes.
		The near horizontal lava flows of the Skaros volcano are remnants of an old shield volcano on Santorini, constructed between approx.
		Rootless lava shields such as the one in the middle ground of the l photo (W of Kilauea's currently active vent Pu'u O'o on the E rift-zone of Kilauea volcano, Hawaii) are not independent volcanoes as such, but they resemble miniature shield volcanoes.
	www.decadevolcano.net /photos/keywords/shield_volcano.htm (297 words)

	lecture 5
		Shield volcanoes gained their name from the fact that their profile against the horizon looks like a shield laying on the ground.
		Shield volcanoes are the largest volcanic features on earth - the largest shield volcano, Mauna Loa in the Hawaiin Islands, has a volume 300 times greater than that of the largest stratovolcano, Mount Fuji in Japan.
		Shield volcanoes are created through the eruption of basaltic magmas, which flow easily and thus are capable of flowing over the landscape many miles from the central fissures or vents.
	www.geology.wisc.edu /courses/g112/lecture5.html (1313 words)

	Maui Air-Volcano Air Tours - (808) 877-5500 The Best way to see the Active Volcanoes on the Big Island of Hawaii ...
		The primary volcanoes on each of the islands are known as shield volcanoes, which are gently sloping mountains produced from a large number of generally very fluid lava flows.
		The age trend of the volcanoes is thought to be due to the way in which the islands are built on the moving sea floor of the North Pacific Ocean.
		The volcano is mantled with young and old lava flows and is actively venting hydrothermal fluids at it's summit and south rift zone.
	www.volcanoairtours.com /index.html (3631 words)

	Volcano Books
		A composite volcano is constructed from alternating layers of pyroclastics and rock solidified from lava flows.
		The Belknap volcano in Oregon is an example of a shield volcano.
		Loihi is the youngest of the Hawaiian volcanoes.
	www.vibrationdata.com /VolcanoBooks.htm (948 words)

	shield volcano
		The biggest single mountain in the world is a shield volcano that was slowly built up from the floor of the Pacific Ocean over hundreds of thousands of years - Mauna Loa.
		A shield volcano like Mauna Loa owes its shape to the way the lava erupts from a vent in the earths crust that begins as a fissure, or crack.
		Shield volcanoes are not the only type of volcano that forms on the ocean floor, nor are all shield volcanoes formed only in the sea.
	www.extremescience.com /shield-volcanoes.htm (511 words)

	What is a Volcano? - PDC (Site not responding. Last check: 2007-11-05)
		Large volcanoes, such as stratovolcanoes and shields, erupt thousands of times throughout their lifetimes, which can last hundreds of thousands to a few million years.
		Shield volcanoes are made of thousands of thin basalt lava flows.
		Eruptions at shield volcanoes are only explosive if water somehow gets into the vent, otherwise they are characterized by low-explosive fountaining that forms cinder cones and spatter cones at the vent.
	www.pdc.org /iweb/volcano_def.jsp (1276 words)

	Volcano
		There are three basic kinds of continental volcanoes: the cinder cone volcano, the shield volcano, and the composite volcano (which is also known as a stratovolcano).
		A cinder cone volcano is a steep cone-shaped hill.
		A shield volcano, unlike the cinder cone, is created from and gets bigger because of lava flows during non-explosive eruptions.
	www.cuca.k12.ca.us /rcms/smith/volcano/contvol.htm (357 words)

	[No title]
		A volcano is a mound, hill or mountain constructed by solid fragments, lava flows, and or dome-like extrusions deposited around a vent from which the material is extruded.
		The vent is a conduit that extends from the earth's upper mantle or lithosphere to the surface.
		Shield volcanoes are large volcanoes with broad summit areas and low-sloping sides (shield shape) because the extruded products are mainly low viscosity basaltic lava flows.
	volcanology.geol.ucsb.edu /volcano.htm (1836 words)

	Vic Camp - shield volcanoes
		Shield volcanoes are broad, low-profile features with basal diameters that vary from a few kilometers to over 100 kilometers (e.g., the
		This gives shield volcanoes a flank morphology that is convex in an upward direction.
		These shield types appear to be generated by ring-fracture eruptions, which delineate the sides of the caldera and mark the site of caldera collapse.
	www.geology.sdsu.edu /how_volcanoes_work/shieldvolc_page.html (291 words)

	Volcano World: Information source about volcano & geological
		A volcano is a geological landform (usually a mountain) where magma (rock of the Earth's interior made molten or liquid by high temperature along with a reduction in pressure and/or the introduction of water or other volatiles) erupts through the surface of the planet.
		Although there are numerous volcanoes (some very active) on the solar system's rocky planets and moons, on Earth at least, this phenomenon tends to occur near the boundaries of the continental plates.
		Volcano : EnchantedLearning.com - volcano is a place on the Earth's surface (or any other planet's or moon's surface) where molten rock, gases and pyroclastic debris erupt through the earth's crust...
	www.mysterieszone.com /volcano.htm (2086 words)

	Volcano - Wikipedia, the free encyclopedia
		Volcanoes are generally found where two to three tectonic plates diverge or converge.
		In 1989 the Voyager 2 spacecraft observed cryovolcanos (ice volcanoes) on Triton, a moon of Neptune, and in 2005 the Cassini-Huygens probe photographed fountains of frozen particles erupting from Enceladus, a moon of Saturn.
		Volcano is thought to derive from Vulcano, a volcanic island in the Aeolian Islands of Italy whose name in turn originates from Vulcan, the name of a god of fire in Roman mythology.
	en.wikipedia.org /wiki/Volcano (3899 words)

	Home
		Shield volcanoes are long flat structures that almost resemble a shield laying flat on the ground.
		Mauna Kea (in Hawaii) is a shield volcano, and when measured from the sea floor, is the largest mountain on earth.
		The shield volcano generally maintains the same slope from the base to the summit.
	www.geol.umd.edu /~jmerck/galsite/research/projects/kase/volcano.html (1991 words)

	Volcanoes: On the edge of an eruption
		The largest of all volcanoes on Earth, these dome-shaped mountains derive their name from their similarity to an ancient warrior's shield lying face up on the ground.
		Lastly, an extinct volcano is one that has not erupted during the last several thousand years.
		Considering that some volcanoes erupt so infrequently - at least in terms of human time - it's difficult to know when a volcano should be classified as completely extinct or even dormant.
	www.exn.ca /volcanoes/types.cfm (483 words)

	Volcano(2)
		There are four basic forms of volcanoes, shield volcanoes, cinder cones, and strato volcanoes.
		Shield volcanoes, like Kilauea, tend to bulge before an eruption, and are shaped like an upturned warrior's shield.
		Strato volcanoes are made by thick, sluggish, viscous, andecitic lava, and rhyolithic lava.
	members.tripod.com /Midju/6.htm (507 words)

	WTP: Mars: Shield Volcano
		Olympus Mons is the largest volcano on Mars.
		This shield volcano, similar to volcanoes in Hawaii, measures 624 km (374 mi) in diameter by 25 km (16 mi) high.
		The radial features on the slopes of the volcano were formed by overflowing lava and debris.
	pds.jpl.nasa.gov /planets/captions/mars/olympus.htm (93 words)

	Medina On-Line: Volcanoes (Site not responding. Last check: 2007-11-05)
		A Dormant volcano is one that has erupted in historical time (there is a record somewhere of it erupting) but has not erupted recently.
		At the peak or summit of the volcano is a wide crater which is made of several smaller craters.
		Since so much shield volcano research has been done in Hawaii, many of the terms used in volcanology are derived from the native language.
	www.3villagecsd.k12.ny.us /Murphy/medina/volcano.html (586 words)

	Types of Volcanos 1
		One of the pernicious oversimplifications in elementary geology (even at college level) is that volcanos come in only three varieties: shield volcanos, cinder cones, and composite volcanos.
		Semantically, this could be right if a volcano is defined as a conical hill or mountain formed by eruption of molten lava.
		This small shield volcano is part of the San Filipe volcanic field.
	www.lpi.usra.edu /science/treiman/greatdesert/workshop/volcanos1 (466 words)

	Overview of the Geology of Kauai (Site not responding. Last check: 2007-11-05)
		The only volcano that is in the pre-shield alkalic stage (and the only reason we think that this stage exists) is Loihi, southeast of the Big Island, which is a shield that hasn't broken the surface yet.
		Therefore, all the rock types on the island are thought to have come from one single shield volcano (one of the things I hope to convince you of is that there has to be more than one shield on the island, but we'll save that for a little later.
		The way that these two (or more) shields grew together is difficult to figure out, and lots of evidence from the island, and from the seafloor surrounding it suggest that giant landslides may have removed large sections of the shields in catastrophic collapses.
	earth.geology.yale.edu /~reiners/tour/intro.html (976 words)

	Volcanoes
		Volcanoes can be divided into three basic shapes: cinder cone, shield, and composite.
		In composite volcanoes, the eruptions alternate between quiet and explosive.
		Volcano world has volcanologist interviews where you can learn how they became interested in studying volcanoes as well as their experiences with volcanoes.
	www.usoe.k12.ut.us /curr/science/sciber00/8th/earth/sciber/surface2.htm (381 words)

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