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Topic: Volcanic cone

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	Global Volcanism Program \| Volcanic Activity Reports \| SI / USGS Weekly Volcanic Activity Report
		Pyroclastic cones are located along the NW and southern coasts, and fumarolic activity occurs from two uneroded scoria cones at the summit.
		Long-term small-to-moderate ash eruptions beginning in that year were later accompanied by lava-dome growth and pyroclastic flows that forced evacuation of the southern half of the island and ultimately destroyed the capital city of Plymouth, causing major social and economic disruption.
		The upper slopes of the stratovolcano, composed primarily of Pleistocene andesitic lava flows, steepen to nearly 45 degrees.
	www.volcano.si.edu /reports/usgs (3341 words)

	Volcanic and Geologic Terms
		Hot Spot: A volcanic center, 60 to 120 miles (100 to 200 km) across and persistent for at least a few tens of million of years, that is thought to be the surface expression of a persistent rising plume of hot mantle material.
		Volcanic Cone: A mound of loose material that was ejected ballistically.
		Volcanic Neck: A massive pillar of rock more resistant to erosion than the lavas and pyroclastic rocks of a volcanic cone.
	volcano.und.nodak.edu /vwdocs/glossary.html (0 words)

	Far Domes Near Cones
		Cones are difficult features to observe, due to their small size, and in many amateur images they appear as unresolvable features.
		Volcanic cones are constructed by the accumulation of pyroclastic materials.
		Lunar cones come in many shapes and sizes, but the most common shape is a circular, slightly dome shaped structure with a high slope and a central crater or fissure.
	www.amlunsoc.org /far_domes_near_cones.htm (0 words)

	ConeNeb.htm (Site not responding. Last check: )
		Cone Nebula, 2500 light-years from Earth as seen by the Hubble Telescope.
		This enormous pillar of gas and dust is about 2.5 light-years high.
		The origin of these pillars is still debated, but their size compared to volcanic explosion columns is enormous.
	www.doubledeckerpress.com /coneneb.htm (72 words)

	volcanic cone - definition of volcanic cone by the Online Dictionary from Datasegment.com (Site not responding. Last check: )
		Volcanic foci, the subterranean centers of volcanic action; the points beneath volcanoes where the causes producing volcanic phenomena are most active.
		Volcanic mud, fetid, sulphurous mud discharged by a volcano.
		Volcanic rocks, rocks which have been produced from the discharges of volcanic matter, as the various kinds of basalt, trachyte, scoria, obsidian, etc., whether compact, scoriaceous, or vitreous.
	onlinedictionary.datasegment.com /word/volcanic+cone (167 words)

	ScienceDaily: Volcanic cone
		Volcanic cones are of different types, depending upon the nature and size of the fragments ejected during the eruption.
		Volcanic cone -- Volcanic cones are among the simplest volcano formations.
		Volcanic ash -- Volcanic ash consists of very fine rock and mineral particles less than 2 mm in diameter that are ejected from a volcanic vent.
	www.sciencedaily.com /encyclopedia/Volcanic_cone (1578 words)

	Volcanism Studies Related to the Probabilistic Volcanic Hazard at Yucca Mountain for the Period 1986-1996
		The volcanic section to the west of Mt. Perkins consists of a basal section of basalt overlain by a thick section of andesite and subordinate dacite, in turn overlain by a thick section of dacite and rhyolite flows and domes.
		Except for a well-developed lava lake at its summit and numerous rootless lava flows, the cone is composed of pyroclasts of scoria, agglutinated scoria, ash, and bombs.
		Red Cone proper is a highly eroded block and scoria cone built primarily of blocks of lava that are locally welded together and minor amounts of scoria, bombs, and ash.
	www.state.nv.us /nucwaste/yucca/volcan01.htm (8178 words)

	Auckland volcanoes
		Knowledge of the type and effects of volcanic activity are based on studies of volcanic deposits in the Auckland area and on analogues of similar eruptions from similar types of volcanoes elsewhere in the world.
		Although volcanic earthquakes rarely exceed an intensity of 8 on the Modified Mercalli Scale (this scale is based on the felt intensity of an earthquake and is different from the Richter scale based on the amount of energy released), they would be destructive if an eruption occurred in or near a built up area.
		Maar: A volcanic cone with gently inclined outer slopes and a broad crater with steep inner slopes.
	www.gns.cri.nz /what/earthact/volcanoes/nzvolcanoes/aucklandprint.htm (6164 words)

	Volcanic cone - Definition, explanation
		Spatter cones are typical of volcanoes with highly fluid magma, such as those found in the Hawaiian Islands.
		An ash cone is comprised of particles of silt to sand size.
		A cinder cone is a volcanic cone built almost entirely of loose volcanic fragments called cinders (pumice, pyroclastics, or tephra).
	www.calsky.com /lexikon/en/txt/v/vo/volcanic_cone.php (445 words)

	Alaska Volcano Observatory - Glossary (Site not responding. Last check: )
		Volcanic debris avalanches commonly form by some type of structural collapse of the volcano, usually the steep front of the cooled lava dome, or other parts of the upper edifice.
		littoral cone - A cone of lava fragments built on the surface of a lava flow pouring into a body of water, usually the sea, is called a littoral cone ("littoral" refers to a shoreline).
		Volcanic eruptions can also cause tsunamis if unconsolidated volcanic sediment flows rapidly or falls into the water as in a catastrophic slope failure from a steep-sided volcanic cone or edifice, or if explosive eruptions occur at or near sea level.
	www.avo.alaska.edu /downloads/glossary.php (4287 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: )
		Volcanic cones are among the simplest volcano formations in the world.
		An ash cone is composed of particles of silt to sand size.
		ParÃcutin, the Mexican cinder cone which was born in a cornfield in February 20 1943, and Sunset Crater in Northern Arizona in the US Southwest are classic examples of cinder cones.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Volcanic_cone (450 words)

	How Old is "Cinder Cone"?—Solving a Mystery in Lassen Volcanic Park, California \| USGS Fact Sheet
		Cinder Cone is a 700-foot-high cone of loose scoria.
		The eruptions and volcanic history of Cinder Cone have been an ongoing controversy for more than a century, in part because of the starkly beautiful contrast between the very new looking, unvegetated cone and lava flows and the surrounding mature forest.
		The earlier erupted group of volcanic deposits at Cinder Cone, which are relatively titanium-poor, consist of the older scoria cone, the Old Bench flow, the two Painted Dunes flows, and the lower part of the widespread ash layer.
	pubs.usgs.gov /fs/2000/fs023-00 (0 words)

	Eruptions of Vesuvio1631-1799
		On 3 Oct 1685, volcanic cloud, ash and scoriae on the cone.
		On 25 Oct 1751, at 0400, fracture on the SE flank of the cone toward Bosco.
		On 17 Jun, increase of ash emission and collapse of the cone.
	vulcan.fis.uniroma3.it /vesuvio/VESUVIO_1631-1944.html (2966 words)

	Travel the Volcanic Legacy Byway All American Road in Oregon and California
		The Volcanic Legacy Scenic Byway traverses the southern section of the great Cascade range, a chain of active volcanoes that stretch from the Canadian border to northern California.
		At 4317 meters above seal level, Mount Shasta is the tallest volcano on the Byway...one of the largest composite cones (or stratovolcanos) in the world, so-called because the volcano actually consists of the remains of at least four different cones, two of which were destroyed by erosion or explosion.
		Shastina, the northernmost peak of Mount Shasta, is a large subsidiary cone that rises to 3,758 meters on the west flank of the compound volcano.
	www.volcaniclegacybyway.org /volcan.html (895 words)

	ScienceMaster - JumpStart - Volcanic Landslides
		Landslides are common on volcanoes because their massive cones (1) typically rise hundreds to thousands of meters above the surrounding terrain; and (2) are often weakened by the very process that created them--the rise and eruption of molten rock.
		Magma that remains within the cone releases volcanic gases that partially dissolve in groundwater, resulting in a hot acidic hydrothermal system that weakens rock by altering rock minerals to clay.
		By removing a large part of a volcano's cone, a landslide may abruptly decrease pressure on the shallow magmatic and hydrothermal systems, which can generate explosions ranging from a small steam explosion to large steam- and magma-driven directed blasts.
	www.sciencemaster.com /jump/earth/slides.php (662 words)

	volcanic cone definition - Dictionary - MSN Encarta
		volcanic cone definition - Dictionary - MSN Encarta
		Search for "volcanic cone" in all of MSN Encarta
		cone around crater: a cone-shaped mass of material that has built up around the crater of a volcano
	encarta.msn.com /dictionary_1861734515/volcanic_cone.html (72 words)

	Volcanic Terminology - PDC
		Hot Spot: A volcanic center, 60 to 120 miles (100 to 200 km) across and persistent for at least a few tens of million of years, that is thought to be the surface expression of a persistent rising plume of hot mantle material.
		Renewed volcanism stage: Refers to a stage in the evolution of a typical Hawaiian volcano during which, after a long period of quiescence, lava and tephra erupt intermittently.
		Volcanic neck: A massive pillar of rock more resistant to erosion than the lavas and pyroclastic rocks of a volcanic cone.
	www.pdc.org /iweb/volcano_terms.jsp (3801 words)

	Volcanic and Geologic Terms (Vanuatu Tourism)
		Dacite: Volcanic rock (or lava) that characteristically is light in color and contains 62% to 69% silica and moderate a mounts of sodium and potassium.
		Renewed Volcanism State: Refers to a state in the evolution of a typical Hawaiian volcano during which --after a long period of quiescence--lava and tephra erupt intermittently.
		Volcanic Cone: A mound of loose material that was ejected ballistically.
	www.vanuatu.net.vu /tourism/intro/volcanoe/volcanic-and-geologic-terms.shtml (4532 words)

	volcanic eruption animations
		Although the general impression is that volcanoes "blow up," the forces in explosive volcanic eruptions are generally too small to literally blast large pieces of the existing volcanic cone upward.
		The rest of the upper part of the cone collapsed as the mass of lava in the heart of the mountain was blasted away.
		Before the 1883 eruption, Krakatoa was a majestic cone at least 7000 feet high on an island 3 by 5 miles in size; after the eruption, only a shallow lagoon surrounded by a ring of small islands remained.
	www.cet.edu /ete/modules/volcanoes/veruptanimation1.html (1153 words)

	VOLCANIC CONE FACTS AND INFORMATION
		They are built by fragments (called ''ejecta'') thrown up (ejected) from a volcanic vent, piling up around the vent in the shape of a cone with a central crater.
		Spatter cones are typical of volcanoes with highly fluid magma, such as those found in the Hawaiian Islands.
		Paricutín, the Mexican cinder cone which was born in a cornfield in 1943, and Sunset Crater in northern Arizona in the US Southwest are classic examples of cinder cones.
	www.bellabuds.com /volcanic_cone (426 words)

	KERINCI (Site not responding. Last check: )
		Morphology of volcanic cones are recognized in Rakata and Anak Krakatau island.
		The old volcanic cone do not show a perfect cone because the upper part of the cone is disappeared by the eruption leaving a big crater rim and the highest peak is 155.66 m above sea level.
		The Krakatau volcanic complex is situated approximately 140 km from the Java trench in the southwest, whereas the Benioff zone is approximately at a depth of 120 km beneath it (Zen, 1983).
	www.vsi.esdm.go.id /volcanoes/krakatau/geology.html (3195 words)

	volcanic eruption animations
		Although the general impression is that volcanoes "blow up," the forces in explosive volcanic eruptions are generally too small to literally blast large pieces of the existing volcanic cone upward.
		The rest of the upper part of the cone collapsed as the mass of lava in the heart of the mountain was blasted away.
		Before the 1883 eruption, Krakatoa was a majestic cone at least 7000 feet high on an island 3 by 5 miles in size; after the eruption, only a shallow lagoon surrounded by a ring of small islands remained.
	www.cotf.edu /ete/modules/volcanoes/veruptanimation1.html (1153 words)

	Welcome to the lesson "Volcanic Cones and Eruptions"
		The three cone shapes are ___________ cones, _____________ cones, and _________________ cones or stratovolcanoes.
		Shield cones form from hot, runny lava that is erupted from the volcano through its summit and the many side vents and fissures throughout the volcano's flanks (Sides).
		Because of this the cones that are produced by this type of eruption is a very steep sided cone called a _________ cone.
	www.comevisit.com /mrjennings/VolConesErpWS.htm (1509 words)

	Volcanic Cone
		Volcanic ash is a harsh abrasive type of ash that is made up of small rock, mineral, and volcanic glass fragments.
		A volcanic bomb is a chunk of viscous lava that is ejected from a volcano.
		Volcanic dust is a solidified lava that is tiny particles.
	www.basicfiles.com /Volcanic_Cone.htm (527 words)

	Volcano #1 (Site not responding. Last check: )
		A type of volcanic cone that formed when quiet flows form a gentle slope is called a ___ cone.
		A type of volcanic cone that forms when eruptions alternate between quiet flow and violent eruptions is called a ___ cone.
		A type of volcanic cone that forms when violent eruptions form a steep sided cone is called a ____ cone.
	www.lisbon.k12.oh.us /DAHS/mccullough/0506/Geology/volcano/Volcano.htm (527 words)

	Volcanic cone (Site not responding. Last check: )
		They are built by fragments erupted from a vent, piling up around the vent in the shape of a cone with a central crater.
		The interaction between the magma, expanding steam, and volcanic gases results in the ejection of mostly small particles called ash.
		An example of a tuff cone is Diamond Head at Waikīkī in Hawai'i.
	www.usapedia.com /v/volcanic-cone.html (292 words)

	Volcanic and Geologic Terms \| Taken From Volcano World
		Accidental: Pyroclastic rocks that are formed from fragments of nonvolcanicrocks or from volcanic rocks not related to the erupting volcano.
		Accretionary lava ball: A rounded mass, ranging in diameter from a few centimeters to several meters, [carried] on the surface of a lava flow such as aa, or on cinder-cone slopes, [and formed] by the molding of viscous lava around a core of already solidified lava.
		Dacite: Volcanic rock (or lava) that characteristically is light in color and contains 62 to 69 percent silica and moderate a mounts of sodium and potassium.
	www.ferndale.wednet.edu /nb/facts/maps/baker/glossary.htm (4320 words)

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