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As the lava or magma rises up to the surface, it cools. Thus, causing the hot lavaor magma to cool and start to harden. As it starts to harden it leaves a trail from bottom to top of the ocean or sea of which it is in. When it is at the top of the surface it forms a big mound or pile of lava or magma. As this mound cools and the lava or magma keeps building up, the trail settles to the bottom of the sea or ocean. When it finally sinks to the bottom, and you can see it, it has formed an island.
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∙ 14y ago
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∙ 8y agoUnless the water is very shallow, the lava will quickly form a hard crust that temporarily stops the lava from moving. The lava then breaks out, crusts over again and the cycle repeats. This process forms deposits of what is called pillow lava. Over many years the rock can pile up to reach the surface of the water and form a new island.
Wiki User
∙ 11y agoA fringing reef (forms around an island in the tropics) forms leading to a barrier reef, to the last stage an Atoll (the island eventually disappears beneath the surface, but not the coral remains at the surface as an atoll)
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∙ 14y agoIt releases nutrients into the water and the lava cools. It can Also cause a tsunami. A tsunami is a giant wave that washes away entire cities. >:o
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∙ 13y agoIt will erupt and the lava will cool and become an igneous rock.
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∙ 13y agoThe Tectonic Plates rumble and can cause Tsunamis and Earthquakes. But then again, it also depends on big the volcano was, and how big of a explosion it made. :P
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∙ 11y agowhat happen if a volcano erupts under the sea
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∙ 11y agoit creates an island usually. :)
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How can volcanoes errupt under water?
The tectonic plates shifting is what causes an underwater volcano to erupt. Plate shifting is also the cause of tsunamis and earthquakes.
Are all volcanoes destructive?
Volcanoes are only destructive to people and property when they erupt. Volcanoes can lie dormant for decades before they erupt. The Hawaiian Islands were all formed from eruptions of volcanoes in the ocean.
Can a volcano erupt under water?
The tectonic plates move under the earth causing an eruption. This is the same basis for both under water and above water volcanoes. These volcanoes are officially called submarine volcanoes. They account for 75% of all magma produced by volcanoes. AND BOOOOOM
How many under water volcanoes erupt a year?
AnswerRight now, Kiluea has erupted non-stop for at least 30 years.
Are volcanoes that always erupt explosively located on water or land?
land
How can volcanoes errupt under water?
The tectonic plates shifting is what causes an underwater volcano to erupt. Plate shifting is also the cause of tsunamis and earthquakes.
Why do some volcanoes erupt in under water?
because they were formed under the sea so when they erupt the can form tsunamis
Can volcanoes erupt under water?
Yes. If this did not happen we would not have volcanic islands.
Are all volcanoes destructive?
Volcanoes are only destructive to people and property when they erupt. Volcanoes can lie dormant for decades before they erupt. The Hawaiian Islands were all formed from eruptions of volcanoes in the ocean.
Can a volcano erupt under water?
The tectonic plates move under the earth causing an eruption. This is the same basis for both under water and above water volcanoes. These volcanoes are officially called submarine volcanoes. They account for 75% of all magma produced by volcanoes. AND BOOOOOM
How many under water volcanoes erupt a year?
AnswerRight now, Kiluea has erupted non-stop for at least 30 years.
How long has ocean pollution been around?
As long as there has been an ocean. Some pollution happens without the assistance of mankind. That includes volcanoes that erupt underwater, and oil deposits that leak out of the ground under or near water.
How do underwater volcanoes erupted?
they erupt just like they do above water
Are volcanoes that always erupt explosively located on water or land?
land
Are geysers volcanoes?
No, geysers send up fountain like jets of water and steam. Volcanoes erupt lava.
Under water volcano?
One of the most active areas for volcanoes found under the sea is known as Pacific Rim of Fire. This area has many volcanoes that could have a devastating effect if they erupt on areas including the Philippines.
What happens in sea-floor spreading?
under water volcanoes move the oceanic plates and spread them
