Asked by: crysp-ga
List Price: $2.00
18 Feb 2004 17:46 PST
Expires: 19 Mar 2004 17:46 PST
Question ID: 308167
Where are volcanoes found?
Answered By: knowledge_seeker-ga on 19 Feb 2004 05:31 PST
Hi crysp ? On earth, most continental volcanoes (those on continents) are found along fault-lines ? that is, where two of earth?s tektonic plates come together. GEOSPHERE ? PLATES http://www.hrw.com/science/si-science/physical/geology/geosphere/platelg.html As the plates collide, one pushes under the other (subduction) causing magma to be released. This forms the volcano. SUBDUCTION http://www.germantown.k12.il.us/gifs/subduc.gif The Pacific Plate's Ring of Fire is the most active and famous of these regions. VOLCANO MAP ? CONTINENTAL PLATES - RING OF FIRE http://www.volcanogallery.com/volcano_rofire.htm RING OF FIRE http://www.graphicmaps.com/aatlas/infopage/ringfire.htm Oceanic volcanoes (most of which are not mapped and described) occur in the deep trenches of the ocean where the plates are pulling apart and the magma seeps up through the crack. DIVERGING PLATES http://ase.tufts.edu/geology/sem/images/zd_diverging_plates.jpg Sometimes enough builds up that after many eons it crests the surface of the ocean. This is how Hawaii was formed. OCEANIC VOLCANOES http://vulcan.wr.usgs.gov/Imgs/Gif/PlateTectonics/Graphics/oceanic_environment.gif Here is a Smithsonian map of all of the active volcanoes of the world. You can click the map to take a closer look at a specific region. Then click the next map to read about the individual volcanoes. http://www.volcano.si.edu/gvp/world/location.cfm Smithsonian Volcanoes Homepage http://www.volcano.si.edu/gvp/ ====================================== MORE ABOUT VOLCANOES AND CONTINENTAL PLATES ====================================== EXPLORING THE ENVIRONMENT ? VOLCANOES http://www.cotf.edu/ete/modules/volcanoes/vlocation1.html ENCHANTED LEARNING - CONTINENTS http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Continents.shtml That should answer your question about where volcanoes are located. Thanks for asking! -K~ search terms ? volcanoes maps volcanoes ring of fire continental plates GOOGLE IMAGE SEARCH: geology plates
From: squid001-ga on 18 Feb 2004 22:22 PST
HEY CRYSP IM SQUID001 WELL VOLCANOS ARE MOSTLY FOUND IN COLD PLACES EG IN NEW ZEALAND MT RUAPEHU IS LOCATED IN THE SNOW AND THEY ARE ALSO ALL LOCATED IN A LINE WHICH IS ALL IN THE SOUTHEN HEMISPHER
Re: Bad Answer
From: katesmith-ga on 29 Mar 2004 16:23 PST
This is NOT correct: "Oceanic volcanoes (most of which are not mapped and described) occur in the deep trenches of the ocean where the plates are pulling apart and the magma seeps up through the crack." Trenches occur at subduction zones, not midoceanic rift zones. The two are not the same thing. You do not find oceanic volcanoes at "the deep trenches of the ocean" because this is NOT where "plates are pulling apart" but rather where they are coming together in subduction zones. The trenches form where one plate is subducting under another, and continental volcanoes form inland of these trenches. Rifting and subduction are NOT the same processes. This is also NOT correct: "Sometimes enough builds up that after many eons it crests the surface of the ocean. This is how Hawaii was formed." Hawaii is a hot spot volcano, NOT a subduction and trench coninental volcano (the Cascade Ranges), nor an oceanic rift zone volcano (Iceland). Hot spots are NOT where "enough builds up that after many eos it crests the surface of the ocean." Where you have midoceanic ridge systems, such as the middle of the Atlantic Ocean, you do get this happening. But ridges are NOT treches. It's not necessarily about eons, though! There's lots more to it than this. However, your is NOT a good answer because it is just plain wrong.
Cold Places and Volcanoes
From: katesmith-ga on 29 Mar 2004 18:03 PST
Volcanoes are also not mostly found in cold places--this has nothing to do with volcanoes. See the Galápagos and Hawaiin volcanoes for examples. The Ring of Fire probably has more volcanoes in hot or warm places than in cold places.
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