Volcanoes

Many volcanoes dot the surface of the Earth, including volcanoes hidden under the sea. Regardless of the location of the volcano, molten rock or magma flows up from deep cracks in the mantle of the Earth. The magma rises 40-60 miles below the surface. The lava is rising due to its combination of low density compared to surrounding rock. Sea affect the flow of lava from its temperature and change their movement.

Many volcanoes dot the surface of the Earth, including volcanoes hidden under the sea.  Regardless of the location of the volcano, molten rock or magma flows up from deep cracks in the mantle of the Earth.  The magma rises 40-60 miles below the surface.  The lava is rising due to its combination of low density compared to surrounding rock.  Sea affect the flow of lava from its temperature and change their movement.

A.
volcanic soil
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The lava from a volcano on the surface by lava tubes.  A lava tube is a flow of magma to the upper layer has hardened and cooled.  The fresh air outside surface of the lava cooled immediately after the eruption of the volcano, but still has a body of magma flowing beneath the surface of the shell.  When lava flows into the ocean, which cools in small fragments of stone.  Fragments sink to the ocean, creating a new layer of rock that have been added in the form of a function, as a continent or an island.
Pillow lava
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Earth’s oceans cover a large area of ​​space from the surface.  Many active volcanoes and cracks in the ocean.  Pillow lavas are formed when magma occurs in the cold depths of the ocean.  The outer surface of the lava hardens immediately, with hot lava found in the hull.  The cushions extend the pressure of the hot lava pushing against the hull.  A new outbreak of lava can penetrate a layer of pillow lavas on the surface, creating a cushion form new and larger.
flowchart of lava
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Sheet lava flows occur when the flow of magma at a faster pace because of the eruption activity.  The outer surface is hardened magma movement of magma under the rivers and the ocean floor.  The magma continues, filling the low-lying magma ponds for the duration of the outbreak.
lobate lava flows
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lobate flows occur in mid-ocean ridges are spreading rapidly.  The lava flows similar to a smooth surface, the ocean waves.  Flow rate is artificially high due to hardening of the surface of the lava from the cold waters of the sea.
Isle of Creation
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Sea and the relationship between the lava flows can build islands.  Thousands of outbreaks occur in deep cracks.  As the lava and cools, it creates more layers stack of rock.  Over time, layers of cooled magma rock construction, gradually spread over the surface of the sea, creating an island.  The island, or islands, such as the canal on the island of Hawaii, is more than the flow of magma in the first crack at the bottom of the ocean.

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One Response to “Volcanoes”
  1. CHIPMUNK Says...

    On June 14, 2011 at 7:09 am

    nice facts of this aritcle


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