Cerro Chirripo in Costa Rica. Is it a volcano or a volcanic uplift?
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Hi,\n\nChirripo is not a volcano. The Talamanca Mountainrange where Chirripo lies was formed in the inferior Pleiocene due to the pressure excerted by the Cocos Plate.\n\nC
138240
WTF? It wasn't a yes or no question.\n\nYellowstone has a recurrance interval of 600,000 years.  That the average time between eruptions.  It's been 640,000 years since the last eruption.  However, don't get too excited, the standard deviation is HUGE.  On geologic time(10,000 yrs) there's a decent chance of eruption.  On human time (the next 60 years) there's about zero.
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volcanos\ntectonic plates movements
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Geologists classify volcanoes in following ways:\n\nCinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. Most cinder cones have a bowl-shaped crater at the summit and rarely rise more than a thousand feet or so above their surroundings. Cinder cones are numerous in western North America as well as throughout other volcanic terrains of the world.\n\nSome of the Earth's grandest mountains are composite volcanoes--sometimes called stratovolcanoes. They are typically steep-sided, symmetrical cones of large dimension built of alternating layers of lava flows, volcanic ash, cinders, blocks, and bombs and may rise as much as 8,000 feet above their bases. Some of the most conspicuous and beautiful mountains in the world are composite volcanoes, including Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mount Shasta in California, Mount Hood in Oregon, and Mount St. Helens and Mount Rainier in Washington.\n\nShield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield. They are built up slowly by the accretion of thousands of highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as thin, gently dipping sheets. Lavas also commonly erupt from vents along fractures (rift zones) that develop on the flanks of the cone. Some of the largest volcanoes in the world are shield volcanoes. In northern California and Oregon, many shield volcanoes have diameters of 3 or 4 miles and heights of 1,500 to 2,000 feet. The Hawaiian Islands are composed of linear chains of these volcanoes including Kilauea and Mauna Loa on the island of Hawaii-- two of the world's most active volcanoes.\n\nVolcanic or lava domes are formed by relatively small, bulbous masses of lava too viscous to flow any great distance; consequently, on extrusion, the lava piles over and around its vent. A dome grows largely by expansion from within. As it grows its outer surface cools and hardens, then shatters, spilling loose fragments down its sides. Some domes form craggy knobs or spines over the volcanic vent, whereas others form short, steep-sided lava flows known as "coulees." Volcanic domes commonly occur within the craters or on the flanks of large composite volcanoes. The nearly circular Novarupta Dome that formed during the 1912 eruption of Katmai Volcano, Alaska, measures 800 feet across and 200 feet high.
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1st answerer is good on location.  Difference between the types are due to the composition of the lava and where they occur.\n\nShield volcanoes, such as those found in Hawaii, have magma that is very low in silica, high in basalt (often referred to as "basaltic" volcanoes).  This means that the lava flows easily, instead of exploding.  That is why there is not a steep slope to the volcano and the biggest threat is just to remain out of the lavas way.\n\nStrato-volcanoes (Mt. St Helens) are found in subduction zones and produce a lava that is described as Andesitic (named after the Andes Mountains in South America).  This lava is high in Silica, which makes it much more viscous, and therefore, more explosive.  This explosiviness defines the shape of the cone, with much steeper sides.  With these types of volcanoes you have the explosive lava threat, but you are also threatened by pyro-clastic flows, and lahars.\n\nCinder cones are the same, compositionally as strato-volcanoes, but are not always located in a subduction zone, and are usually quite alot smaller.
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this site should help you\nhttp://www.space.com/scienceastronomy/planetearth/volcano_monitor_010807-1.html
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Most of Central America and the Caribbean Basin rests on the relatively motionless Caribbean Plate. The Pacific Ocean floor, however, is being carried northeast by the underlying motion of the Cocos Plate. Ocean floor material is relatively dense; when it strikes the lighter granite rocks of Central America, the ocean floor is forced down under the land mass, creating the deep Middle America Trench that lies off the coast of El Salvador. The subduction of the Cocos Plate accounts for the frequency of earthquakes near the coast. As the rocks constituting the ocean floor are forced down, they melt, and the molten material pours up through weaknesses in the surface rock, producing volcanoes and geysers.\n\nNorth of El Salvador, Mexico and most of Guatemala are riding on the westward-moving North American Plate that butts against the northern edge of the stationary Caribbean Plate in southern Guatemala. The grinding action of these two plates creates a fault, similar to the San Andreas in California, that runs the length of the valley of the Rio Motagua in Guatemala. Motion along this fault is the source of earthquakes in northernmost El Salvador,\nThe southern range of mountains is actually a discontinuous chain of more than twenty volcanoes, clustered into five groups. The westernmost group, near the Guatemalan border, contains Izalco and Santa Ana, which at 2,365 meters is the highest point in El Salvador. Between the cones lie alluvial basins and rolling hills eroded from ash deposits. The volcanic soil is rich, and much of El Salvador's coffee is planted on these slopes.
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Well, yeah, there is a relationship.  Most of our recent volcanoes occur near the boundaries of plates.  At mid-ocean ridges hot magma is welling up and cooling to make the plates on either side larger.  Iceland, with its many volcanoes, is on the Mid-Atlantic Ridge.  Where oceanic plates are pushed under other plates (subducted), they are forced deeper into earth where it's hotter, and the subducted plate tends to melt.  The lighter parts of the melt try to work their way toward the surface (because they're less dense, and, hence buoyant), and cause volcanoes such as those of the Pacific's Ring of Fire--Indonesian volcanoes, Japanese volcanoes such as Mount Fuji, Alaska's volcanoes, the Cascade Range in Washington State, and so on.\n\nSome volcanoes are associated with "hot spots", where a plume of magma flows toward the surface, but is not associated with a plate boundary.  The Hawaiian Islands are an example of such a hot spot.  Plate tectonics also affect things here.  The plate moves over the hot spot, continually making new islands.  The newest one hasn't reached the surface yet.  Hawai'i is the newest one that's above the surface, and as you move north and west along the Hawai'ian Archipelago, the islands are progressively older and, because they've had more time to be eroded, smaller.  Northwest of the archipelago are the Emperor Seamounts, islands that were eroded until they no longer reach the ocean's surface.
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Here ya go : \nhttp://volcano.und.nodak.edu/vwdocs/volc_images/img_fuji.html
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Composite cone volcanoes are often found near convergent plate boundaries. And at all fault lines there are earthquakes so yes, there is.
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Composite volcanoes typically form along subduction zones (ocean - continent plate boundaries).  They tend to have higher viscosity magma (andesite and dacite) which allows for more gas pressure to develop.  This produces more explosive eruptions.\n\nSome examples of subduction zones are the western coast of the USA and South America.  The Cascades and the Andes were and are currently being formed by subduction related processes.
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Mt. St. Helens is a subduction volcano.\n\nVolcanism in subduction is caused by volitals, like H2O, CO2. These are carried down by the oceanic plate, mainly in the form of weak minerals. These minerals break down with pressure and temperature into stronger minerals that don't contain water and carbon dioxide. The leftover gases and liquids travel into the mantle (the mantle wedge) and hydrate the mantle, causing melting. The melt rises and then... volcano!
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There are explosions in and on the surface of the sun, but as for volcanoes like here on earth no there are none. Since the surface of the sun is molten (which means not solid) there are no mountains on the sun.
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the core of the planet is said to be liquid under pressure, hence volcanoes.  the earth isn't hit with enough meteors etc to much influence the mass of the planet, but as the sea-floor dictates, can change in size.  an example is the two of the main plates, I believe in the area of the pacific rim.  these two plates are moving apart, at times exposing the hot core which pushes its mass into the cracks and cementing the 'spread' of the two plates. \nif the other plates of the planet move likewise, then yes, the world could increase in volume, and give rise to a bigger earth, in lieu of magma escaping from our depths, or by areas of the earth becoming less in depth to the core, like an icecube in a glass of water. \nsci fi of years gone by have mentioned the core in relation to volcanoes.  the implication was that the volcano activity was putting extreme pressure on our core, which if not filled by natural forces, would create a partly filled container under pressure.  the natural result was thought at the time was that the earth would explode or implode.
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See the link below for damage related to this Volcano:\n\nhttp://www.volcano.si.edu/world/volcano.cfm?vnum=0202-12=&volpage=erupt&VErupt=Y&VSources=Y&VRep=Y&VWeekly=Y
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The short answer is plate tectonics. Volcanoes can be divided into three major groups, those that are connected to a spreading center, like the mid-ocean ridges, those connected to a subduction zone, like Mt.St. Helens, or much of the Indonesian archipelago, and intraplate volcanism like Yellowstone. \n\nWhere the lithosphere (or crust) overlies an area within the asthenosphere (the layer of the earth under the crust) there are currents rising that cause volcanoes to form. These areas are called spreading centers. At the edges of the oceanic plates the plates often are forced under continental or even other oceanic plates. Where these plates are being forced downward, called subduction, there are volcanoes formed by melting magma rising from the descending plate. Most of the volcanoes around the edges of the Pacific Ocean are of this type, and are the reason it is called the "ring of fire".\n\nThe other group of volcanoes are related to what are called hot spots. These are places under the crust where the asthenosphere is especially hot. Yellowstone, and the Hawaiian Islands are examples of this. The hot spot under Hawaii is stationary, and as the Pacific plate has moved across it, it has produced a long chain of volcanic islands. \n\nYou can explore what makes volcanoes work at the following website sponsored by NASA:\nhttp://www.geology.sdsu.edu/how_volcanoes_work/Home.html
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Curiously, I could not find a comprehensive listing.  This site might be helpful, however, or at least give you a start.\n\nhttp://dir.yahoo.com/Science/Earth_Sciences/Geology_and_Geophysics/Volcanology/Volcanoes