How does lava erupt under water?

Answer 1

When lava hits water it is cooled quickly, which makes it look very dark and have a glass like appearance. It is the same with most extrusive igneous rocks, meaning rock that is made from molten rock material (lava or magma) that cools on the surface of Earth, rather than underneath Earth.

Answer 2

It depends on how big the body of water is and how much lava touches it. For example, in the Hawaiian islands, on Big Island, the volcano Mauna Kea regulary erupts non-explosively, with rivers of pahoehoe lava flowing into the ocean. Both forces do not win, with the lava cooling rapidly in the chilly ocean water, and water evaporating instantly into steam. If the body of water is small, and there's a lot of lava, then the body of water will probably entirely be evaporated before cooling all the rock. But if the lava is only a little bit and a lot of water, then some water will evaporate but probably all the lava will cool.

Answer 3

The processes that generate magma operate regardless of what is over the crust. as the earth's interior is extremely hot. Since oceanic crust is thinner than continental crust, it is actually easier for magma generated in the upper mantle to erupt as lava.

Answer 4

If the lava flows quickly enough to heat surface water and deeper water to over 213° F, steam will be produced. If this happens consistently over time, regular steam plumes will form, such as those often seen at East Kupapa`u and Kamoamoa below Kilauea in Hawaii. If the lava flows slower and allows subsurface water to cool it, then steam does not typically form.

If something happens that causes the surface area of the lava entering the water to expand, such as a collapsing bench or multiple fractures, explosions can occur. Some of these can be quite violent and dangerous.

It is important to recognize that volcanic steam can contain glass particles that can cut unprotected skin, and is often very acidic and obviously of high temperature which can cause serious burns.

Answer 5

Igneus rock is formed.

Answer 6

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