what is volcano?

Question

how is it done

is it in asia

Answer 1

Volcano, mountain or hill formed by the accumulation of materials erupted through one or more openings (called volcanic vents) in the earth's surface. The term volcano can also refer to the vents themselves. Most volcanoes have steep sides, but some can be gently sloping mountains or even flat tablelands, plateaus, or plains. The volcanoes above sea level are the best known, but the vast majority of the world's volcanoes lie beneath the sea, formed along the global oceanic ridge systems that crisscross the deep ocean floor (see Plate Tectonics). According to the Smithsonian Institution, 1511 above-sea volcanoes have been active during the past 10,000 years, 539 of them erupting one or more times during written history. On average, 50 to 60 above-sea volcanoes worldwide are active in any given year; about half of these are continuations of eruptions from previous years, and the rest are new.

All volcanoes are formed by the accumulation of magma (molten rock that forms below the earth's surface). Magma can erupt through one or more volcanic vents, which can be a single opening, a cluster of openings, or a long crack, called a fissure vent. It forms deep within the earth, generally within the upper part of the mantle (one of the layers of the earth’s crust), or less commonly, within the base of the earth's crust. High temperatures and pressures are needed to form magma. The solid mantle or crustal rock must be melted under conditions typically reached at depths of 80 to 100 km (50 to 60 mi) below the earth’s surface.

Once tiny droplets of magma are formed, they begin to rise because the magma is less dense than the solid rock surrounding it. The processes that cause the magma to rise are poorly understood, but it generally moves upward toward lower pressure regions, squeezing into spaces between minerals within the solid rock. As the individual magma droplets rise, they join to form ever-larger blobs and move toward the surface. The larger the rising blob of magma, the easier it moves. Rising magma does not reach the surface in a steady manner but tends to accumulate in one or more underground storage regions, called magma reservoirs, before it erupts onto the surface. With each eruption, whether explosive or nonexplosive, the material erupted adds another layer to the growing volcano. After many eruptions, the volcanic materials pile up around the vent or vents. These piles form a topographic feature, such as a hill, mountain, plateau, or crater, that we recognize as a volcano. Most of the earth's volcanoes are formed beneath the oceans, and their locations have been documented in recent decades by mapping of the ocean floor.
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Answer 2

A volcano is a geological landform (usually a mountain) where magma (rock of the earth's interior made molten or liquid by high pressure and temperature) erupts through the surface of the planet. Although there are numerous volcanoes (some very active) on the solar system's rocky planets and moons, on Earth at least, this phenomenon tends to occur near the boundaries of the continental plates. However, important exceptions exist in hotspot volcanoes.

Answer 3

A volcano is a geological landform (usually a mountain) where magma (rock of the earth's interior made molten or liquid by high pressure and temperature) erupts through the surface of the planet. Although there are numerous volcanoes (some very active) on the solar system's rocky planets and moons, on Earth at least, this phenomenon tends to occur near the boundaries of the continental plates. However, important exceptions exist in hotspot volcanoes

Answer 4

A volcano is a geological landform usually generated by the eruption through a vent in a planet's surface of magma, molten rock welling up from the planet's interior. Volcanoes of various types are found on other planets and their moons as well as on earth. Roughly defined, a volcano consists of a magma chamber, pipes and vents. The magma chamber is where magma from deep within the planet pools, while pipes are channels that lead to surface vents, openings in the volcano's surface through which lava is ejected during an eruption.

Answer 5

A volcano is a geological landform usually generated by the eruption through a vent in a planet's surface of magma, molten rock welling up from the planet's interior. Volcanoes of various types are found on other planets and their moons as well as on earth. Roughly defined, a volcano consists of a magma chamber, pipes and vents. The magma chamber is where magma from deep within the planet pools, while pipes are channels that lead to surface vents, openings in the volcano's surface through which lava is ejected during an eruption.

Answer 6

Most volcanoes are formed where two tectonic plates are colliding. One plate slides under the other, this is called subduction. The material in the subducted plate is lighter in density and get heated in the mantle of the earth. It expands turns into liquid and gasses and rises up through weaknesses in the crust forming a volcano. There are also some volcanoes like Hawaii that are not formed by the collision of tectonic plates. They
are a hot spot in the earth's mantle that may have been caused by the collision of a comet or asteroid millions of years ago that pierced the mantle allowing magma to flow up.

Answer 7

i'm no longer optimistic about Penrith, yet i understand for certain that there are volcanoes in Australia. all of them have stopped functioning million of years in the past besides the undeniable fact that. i have traveled through the state of victoria and performance seen some. In Koroit, a small city close to the finished ocean street, there is tremendous extinct volcano, that's now a nature reserve. in the Camperdown section, volcanoes is also got here upon. The close by Mt Leura is easily climbed and has good perspectives from it really is top. playstation - Oops, so it style of feels i turned right into somewhat it incorrect about the "million" component. besides, they're easily previous and are interesting to visit..

Answer 8

It is a landform. When plates collide they can push up and form a volcano. When Magma builds up it can spew out the top or through "vents" in the side. Try watching the History Channel or Discovery or even Travel channels.

Answer 9

What are you talking about? The natural lanform..or some type of drink?? How is a volcano done?! I have no idea

Answer 10

A mountain that errupts when it isnt dormant.

Good question, not quite sure what causes it to erupt though. I always thought it was triggered by an earthquake or some sort of ground movement.