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Topic: Extinct volcano

	Volcano - LoveToKnow 1911
		VOLCANO, an opening in the earth's crust, through which heated matter is brought, permanently or temporarily, from the interior of the earth to the surface, where it usually forms a hill, more or less conical in shape, and generally with a hollow or crater at the top.
		The volcanoes of central France are regarded as extinct, inasmuch as no authentic historical record of any eruption is known, but there are not wanting signs that in some parts of this volcanic region the subterranean forces may yet be slumbering rather than dead.
		Most of the lavas from the volcanoes of South America consist of hypersthene-andesite, and it is notable that the fragmental ejectamenta from the eruptions of St Vincent and Martinique in 1902 and from Krakatoa in 1883 were evidently derived from a magma of this Pacific type.
	www.1911encyclopedia.org /Volcano (17787 words)

	Volcanoes of Canada - Volcanic eruptions
		Volcanoes are referred to as 'active', 'dormant', or 'extinct'.
		A volcano that is actually erupting is said to be 'active' or 'in eruption'.
		However, it is important to remember that an erupting volcano may exhibit more than one type of behaviour, and it is not uncommon for both passive and explosive phases to occur in a single eruptive cycle.
	gsc.nrcan.gc.ca /volcanoes/erupt_e.php (653 words)

	volcano
		For example, many of Earth's volcanoes have erupted dozens of times in the past few thousand years but are not currently showing signs of activity.
		Scientists usually consider a volcano active if it is currently erupting or showing signs of unrest, such as unusual earthquake activity or significant new gas emissions.
		Extinct volcanoes are those that scientists consider unlikely to erupt again.
	www.daviddarling.info /encyclopedia/V/volcano.html (387 words)

	Geology of Hawaii
		The chain is remarkable for its length and the number of volcanoes that comprise it, the bend that separates the older Emperor Seamount Chain from the younger Hawaiian Ridge, and the age of the volcanoes, which is systematically younger towards the southeast.
		Kohala Volcano is extinct; it consists of shield lavas, including the oldest lavas from the island of Hawaii, dated at about 460,000 years old, and postshield-stage lavas as young as 60,000 years old.
		Ni'ihau, an extinct volcano with shield- (4.9 million years old), postshield- (4.9 million years old), and rejuvented- (2.5 million to 400,000 years old) stage lavas, has no exposed summit caldera complex; it was apparently removed during a large landslide towards the east.
	users.bendnet.com /bjensen/volcano/eastpacific/hawaii-hawaii.html (3549 words)

	Volcanic Hazards and Prediction
		During the 1883 eruption of Krakatau volcano, in the straits of Sunda between Java and Sumatra, several tsunami were generated by pyroclastic flows entering the sea and by collapse accompanying caldera formation.
		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.
	www.tulane.edu /~sanelson/geol204/volhaz&pred.htm (2781 words)

	volcano
		These extinct volcanoes may owe their shape partly to erosion, although they probably never had very pronounced craters but had lava welling right to the brim before solidification.
		Extinct Volcano - An extinct volcano is a volcano that has not shown any historic activity, is usually deeply eroded, and shows no signs of recent activity.
		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.
	earthsci.org /processes/geopro/volc/volc.html (8257 words)

	Volcanoes (Site not responding. Last check: )
		The danger to life posed by active volcanoes is not limited to the eruption of molten rock or showers of ash and cinders.
		Volcanoes along the Andes in South America and the Cascade Range in North America are examples of volcanoes that formed on continental crust overlying subduction zones.
		Several volcanoes in the chain are still quite active, and new underwater volcanoes are forming to the southeast of Hawaii as the Pacific Plate continues to move over the hot spot.
	www.pacificislandtravel.com /nature_gallery/volcanoes.html (1842 words)

	Volcanoes Online: Glossary
		Complex Volcano: A volcano that consists of a complex of two or more vents, or a volcano that has an associated dome, either in its crater or on its flanks.
		Extinct Volcano:A volcano which is not currently erupting and which isn't likely to do so in the future.
		Plug:Lava solidified in the conduit of an extinct volcano.
	library.thinkquest.org /17457/glossary/glossary.html (1253 words)

	Volcanic and Geologic Terms
		Compound Volcano: A volcano that consists of a complex of two or more vents, or a volcano that has an associated volcanic dome, either in its crater or on its flanks.
		Extinct Volcano: A volcano that is not presently erupting and is not likely to do so for a very long time in the future.
		Volcano: A vent in the surface of the Earth through which magma and associated gases and ash erupt; also, the form or structure (usually conical) that is produced by the ejected material.
	volcano.und.nodak.edu /vwdocs/glossary.html (4560 words)

	volcanoes
		We could say a volcano is a liquid rock plumbing system which extends from several 10's of kilometers depth to the earth's surface, and includes the near vent deposits of eruptions.
		Extinct: A volcano not known to have erupted within modern history is classified as an extinct volcano.
		Volcanologists consider truly extinct volcanoes to be those that have been worn away almost to the level of their magma chamber.
	biblia.com /disasters/volcanoes.htm (977 words)

	Natural Disasters - Volcano
		The word Volcano comes from the word "Vulcan" which is the god of fire in Roman mythology.
		Volcano's don't necessarily have to be on earth.
		Lava from volcano's is acidic and therefore is a contribution towards acid rain.
	www.projectshum.org /NaturalDisasters/volcano.html (265 words)

	Activity
		Active volcanoes are watched very closely so people and animals in the area can be moved to a safe place.
		A dormant or sleeping volcano is a volcano that has been quiet for a long time, but still has signs it may erupt again.
		A volcano becomes dormant when the vent is blocked by hardened lava, called a plug, or if the magma seeps back under the earth’s crust.
	volcano.und.nodak.edu /vwdocs/kids/volcano_project/activity.html (289 words)

	Extinct volcano - Wikipedia, the free encyclopedia
		An Extinct volcano is a volcano which is not currently erupting and which is not considered likely to erupt in the future.
		It is difficult to distinguish an extinct volcano from a dormant volcano because a volcano is usually considered to be extinct if there are no written records of its activity.
		Nevertheless volcanoes may remain dormant for a long period of time and it is not uncommon for a so-called 'extinct' volcano to erupt again.
	en.wikipedia.org /wiki/Extinct_volcano (108 words)

	Florida extinct species and How would you classify an extinct volcano if it erupts again and Bears becoming extinct in ...
		Extinct ocean plant species districts usually extinct and endangered species smaller towns, usually with populations of less than Extinct wildlife,000, From the 1930s extinct dinosaurs, many extinct amimald and extinct animal auroch districts were extinct fish found, and so many exploring the extinct animals districts often extinct amimald some recently extinct animals areas as well.
		In many endangered or extinct animals law jurisdictions, the animals extinct in the wild law definition has been replaced by a documentation of life extinct and victoria and australia definition, but without is perth named after an extinct volcano changing the extinct or endangered species concept.
		Nonetheless, it was dodos moas extinct birds, especially in Ontario, to what caused the dodo bird to become extinct counties with extinct fl widow population into extinct mammoth electoral districts, which thus became known as "ridings" in stop polar bears from extinct documents.
	extinct.thesignfoundation.org (2197 words)

	Volcano Mt. Shasta's Surrounding Spiritual Euphoria -- I
		Astronauts and cosmonauts have often mentioned how their understandings of life on the earth were changed from the views of the space ships circling the earth.
		An impressive double-peaked extinct volcano, it dominates the landscape (a vast panorama of tumbled mountains and valleys) for a hundred miles.
		For many of the "new agers" and "spiritual seekers and teachers" who live or pilgrimage to Mt. Shasta in the late twentieth century, it is rather harsh, uninspiring, and sometimes even offensive, to call it a mere snow-covered, extinct volcano with lenticular cloud formations.
	www.geocities.com /americanreflections/Volcano_Mt_Shastas_Surrounding_Spiritual_Euphoria-1.html (1498 words)

	Volcano \| World of Earth Science Summary
		Volcanoes are vents or fissures in Earth's crust through which lava, gases, and pyroclastic debris are released.
		Based on the timing of their last eruption, volcanoes are classified as active (having erupted during historic time), dormant (having no recent eruptions, but with the potential to erupt again), or extinct (having no historic eruptions and showing no evidence of future eruptions).
		Shield volcanoes, with their gentle slopes and curved profile, are the largest of all volcanoes.
	www.bookrags.com /research/volcano-woes-02 (910 words)

	The Volcano Tour, page 10 (Site not responding. Last check: )
		Crater Lake in Oregon is an extinct volcano.
		An extinct volcano is one that scientists do not think is likely to erupt again.
		It is hard to determine whether a volcano is extinct or not.
	www.greenville.k12.oh.us /volcano/tour10.html (54 words)

	Maui Nui, the Bigger Island
		Not all volcanoes go through the postshield or rejuvenated stages, and preshield stage lavas are presumably buried beneath later lavas on all the volcanoes except Loihi Seamount, which has not yet progressed past the preshield stage.
		West Maui Volcano is an extinct volcano whose evolution includes shield (1.6 to 2.0 million years old), postshield (1.5-1.2 million years old), and rejuvenated stages.
		East Moloka'i is an extinct volcano with lavas erupted during the shield (1.5 million years old) postshield (1.5-1.35 million years old), and rejuvenated stages (570,000 to 350,000 years old).
	hvo.wr.usgs.gov /volcanowatch/1995/95_09_22.html (922 words)

	Capulin Volcano National Monument (U.S. National Park Service)
		A 2-mile paved road to the top of the volcano and paved trails into the crater and around its rim provide access to explore the volcano.
		Although long extinct, Capulin Volcano offers visitors excellent opportunities for observing and understanding volcanic formation and 10 million years of geologic history in Northern New Mexico.
		Capulin Volcano is approximately 4 miles in circumference at the base with a crater diameter of 1450 feet and an elevation of 8182 feet at the highest point.
	www.nps.gov /cavo (195 words)

	Volcano
		Active volcanoes are in the process of erupting or show signs of eruption in the very near future.
		Dormant volcanoes are "sleeping." This means they are not erupting at this time, but they have erupted in recorded history.
		A volcano will usually register some small earthquakes as the magma pushes its way up through cracks and vents in rocks as it makes its way to the surface of the volcano.
	www.cuca.k12.ca.us /rcms/smith/volcano/predict.htm (476 words)

	VOLCANOES
		A volcano that has not erupted in 1000 years is extinct.
		The vents of many older volcanoes become so plugged with hardened lava that the vent may be permanently relocated and a new cone built on the flanks of the old one.
		erosion weakens the volcano and causes it to collapse.
	www.uwgb.edu /dutchs/Exams/EarthSC102Exams/102Volcano.HTM (1236 words)

	Extinct Volcano - John Seach
		An extinct volcano is one which is no longer active and hasn't erupted in historical times.
		Fourpeaked volcano in Alaska erupted in 2004 for the first time in 10,000 years.
		Geological records show volcanoes in Hawaii may be dormant for one million years before reactivating.
	www.volcanolive.com /extinct.html (56 words)

	volcano (Site not responding. Last check: )
		Magma erupting from a volcano is called lava.
		A volcano is active if it erupts lava, releases gas or shows seismic activity.
		It is dormant if it hasn't erupted for a long time but could again one day.
	t3.preservice.org /T0402019/volcano.html (189 words)

	Volcano
		Interestingly, hotspot volcanoes are also found elsewhere in the solar system, especially on rocky planets and moons.
		Lassen Peak in California is an example of a volcano formed from felsic lava and is actually a large lava dome.
		A popular way of classifying magmatic volcanoes goes by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant, and those that have not erupted in historical times called extinct.
	schools-wikipedia.org /wp/v/Volcano.htm (3019 words)

	extinct - definition of extinct from YourDictionary.com
		nearly: The Bosnian church, essentially Catholic in doctrine, was nearly extinct by the 15th century.
		volcano: El Valle Situated in the crater of an extinct volcano, El Valle is famous for its Sunday Indian craft market.
		cone: There is an extinct lava cone with a walkway to the summit.
	www.yourdictionary.com /extinct (354 words)

	volcano - definition of volcano from YourDictionary.com
		extinct: El Valle Situated in the crater of an extinct volcano, El Valle is famous for its Sunday Indian craft market.
		island: The Spaceship was hidden in the crater of an extinct volcano on a remote island.
		island: As one island volcano becomes extinct, another develops over the hotspot, and the cycle is repeated.
	www.yourdictionary.com /volcano (451 words)

	ABC News: Extinct Hawaii Volcano Hosts Concert (Site not responding. Last check: )
		HONOLULU Mar 29, 2006 (AP)— Hawaii's most famous dormant volcano is in for a loud awakening.
		The rugged volcano is popular among tourists and residents who enter the crater through a car tunnel and hike to a lookout for a panoramic view of Honolulu's skyline and the surrounding Pacific.
		The state is instructing organizers to brief the audience on the cultural and historic significance of the 300,000-year-old volcano, which is home to native Hawaiian plants and sacred temples.
	abcnews.go.com /Entertainment/wireStory?id=1782759 (378 words)

	Newberry National Volcanic Monument - Trivia - Newberry Volcano
		Newberry Volcano is a large shield-shaped composite volcano approximately 25 miles in diameter and covers 500 square miles.
		The average elevation of the base of Newberry Volcano is 4,400 feet.
		At the summit of Newberry Volcano is Newberry Crater which is about 4 miles in diameter and covers about 17 square miles.
	www.fs.fed.us /r6/centraloregon/newberrynvm/trivia-newberry.shtml (540 words)

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