Contrast shield volcanoes and cinder-cone volcanoes.?
597381
Geologists generally group volcanoes into four main kinds--cinder cones, composite volcanoes, shield volcanoes, and lava domes. \n\nIn regard to your question, Cinder 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\nShield volcanoes 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. The floor of the ocean is more than 15,000 feet deep at the bases of the islands. As Mauna Loa, the largest of the shield volcanoes (and also the world's largest active volcano), projects 13,677 feet above sea level, its top is over 28,000 feet above the deep ocean floor.
316501
Disadvantages: destruction during eruptions,  magma flowing and ash clouds destoys everything on its way, earthquakes are frequent near active volcanoes.\n\nAdvantages: Volcanoes during eruptions throw out materials containing lots of minerals that turn into very fertile soils. After an eruption the land turns to be excellent for agriculture for many years. For example Greek and Roman civilizations settled on the fertile volcanic soils in the Mediterranean-Aegean region.
660018
Different kinds of volcanos.. Shield, cone etc.\nJust the way the lavva flows out and the ash spits up./
731661
Well, a shield volcano is the shortest volcano, but it's not the one with the shortest diameter. Stratovolcanoes are.
769464
Shield volcanoes are composed of basaltic, low viscosity lavas. which have low height/area aspect ratio (think about Hawaii).\nComposite volcanoes have a high height/are aspect ratio and are formed formed by andesitic to dacitic lavas, and pyroclasts. They are also called strato-volcanoes.\nThe domes, are dome shaped eruptions, lavas or volcanoes formed by dacitic to rhyolitic lavas, with some pyroclasts in the rims. They can also form cake like shapes or even very impressive protruding spine-shaped extrusion of very viscous magma.
917316
Cinder Cones build up when tephra erupts from a vent and falls back to earth around the vent.  The accumulated tephra, which are cinders, forms a cone-shaped mountain.  Paricutin, in western Mexico is well known for its cinder cone.  It began in 1943, when a crack opened in the ground of a cornfield.  When the eruptions ended in 1952, the top of the cone had grown to 1,345 feet (410 meters) above its abase.
765041
The two properties of the magma that determine the kind of volcano are:\n\n1)Viscosity\n2)Composition\n\nThe viscosity of the magma is a function of the temperature, the degree of crystallization, degree of polymerization and the composition of the melt.\n\nThe composition of the melt is related to the amount of silica it contains and the amount of volatiles dissolved.\n\n\nThis two property are usually coupled (they act together).\nSilica rich magmas are usually colder that mafic ones, contain more volatiles, and hence they have a higher viscosity compared to mafic magmas, so they form strato volcanoes as opposed to shield volcanoes.
127229
Super Volcanoes are planet killers!!! Yellowstone is the first one that comes to my mind.\n\nHere's what wikipedia says:\n\n"A supervolcano refers to a volcano that produces the largest and most voluminous kinds of eruption on Earth. The actual explosivity of these eruptions varies, but the sheer volume of extruded magma is enough to radically alter the landscape and severely impact global climate for years, with a cataclysmic effect on life.\n\nThe term was originally coined by the producers of the BBC popular science program, Horizon, in 2000 to refer to these types of eruption. That investigation brought the subject more into the public eye, leading to further studies of the possible effects. At first, supervolcano was not a technical term used in volcanology, but more recently, in 2003 and 2004, the term has been used in articles. Though there is no well-defined minimum size for a "supervolcano", there are at least two types of volcanic eruption that have been identified as supervolcanoes: massive eruptions and large igneous provinces."
950107
Ah... something called a caldera forms.\n\nhttp://vulcan.wr.usgs.gov/Glossary/Caldera/description_caldera.html\nhttp://en.wikipedia.org/wiki/Caldera\nhttp://www.agu.org/pubs/crossref/2003/2003GL018380.shtml\nhttp://hvo.wr.usgs.gov/volcanowatch/1996/96_04_26.html\nhttp://www.yellowstonenationalpark.com/calderas.htm\nhttp://www.mvo.ms/glossary.htm\n\nGosh, if these don't help... I don't know what will.
890167
volcanoes and earthquakes (faults)
821602
The first site below has a good simple explanation of earthquakes and volcanoes.  The second site focuses on recent earthquakes and volcanoes around the world.\nMy favorite video on Volcanoes is from the Eyewitness video series... great photography  and fast moving.  You might be able to find it in a video rental store or the library.  I'm not sure what you needed to know about this subject, so here is a variety.  Hope one of them helps.
815221
andesitic lava is blocky
368152
this site should help you\nhttp://www.space.com/scienceastronomy/planetearth/volcano_monitor_010807-1.html
649919
Here is one:\n\nhttp://etap.org/newsletter/volcano/shield.jpg\n\nBut just type ¨shield volcano¨  in google images (I just did) and you can choose between hundreds.
150920
It's a pretty impressive stratovolcano also called Fuji-san. It towers almost 11,500 feet above the surrounding area. The most recent eruption was in 1707 on the southeast side of the cone. That eruption blew out about 0.8 cubic kilometers of volcanic ash. By comparison Mt.St.Helens in 1980 ejected 1.25 cubic km of ash. There have been 16 eruptions recorded since 781 AD. \n\nIt appears from looking at the Global Volcanism Program that there has been no earthquake activity in the volcano since 2001. It seems quiet, but is a young volcano still. \n\nHere is a great collection of Mt Fuji photos:\nhttp://live-fuji.jp/fuji/beste.htm\nHere is a live web cam link of Mt Fuji:\nhttp://live-fuji.jp/fuji/livee.htm
832341
Check out all the links I listed, you should enjoy...\n\nA volcano is an opening (or rupture) in the Earth's surface or crust, which allows hot, usually molten rock, ash, and gases to escape from deep below the surface. Volcanic activity involving the extrusion of rock tends to form mountains or features like mountains over a period of time.\n\nVolcanoes are generally found where two to three tectonic plates pull apart or are coming together. A mid-oceanic ridge, like the Mid-Atlantic Ridge, has examples of volcanoes caused by "divergent tectonic plates" pulling apart; the Pacific Ring of Fire has examples of volcanoes caused by "convergent tectonic plates" coming together. By contrast, volcanoes are usually not created where two tectonic plates slide past one another (like the San Andreas fault). Volcanoes can also form where there is stretching of the Earth's crust and where the crust grows thin (called "non-hotspot intraplate volcanism"), such as in the African Rift Valley or the European Rhine Graben with its Eifel volcanoes).\n\nFinally, volcanoes can be caused by "mantle plumes," so-called "hotspots;" these hotspots can occur far from plate boundaries, such as the Hawaiian Islands. Interestingly, hotspot volcanoes are also found elsewhere in the solar system, especially on rocky planets and moons.
333517
cinder cones\ncomposite cones\nshield