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It will form extrusive igneous rock. Beyond that they exact type will vary.

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What type of rock forms form magma erupts from an undersea volcano?

Extrusive igneous rocks


Where to go if a volcano erupts?

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What type of boundary is a shield volcano?

is the type of volcano that often erupts with a mix of stream,ash,rock and dust causing a pyroclastic folw


When a volcano erupts lava may flow onto the surface. What type of rock does the lava cooling form?

When lava cools on the surface, it forms igneous rock called basalt.


What makes a rock type of rock?

That depends on the chemistry of magma the volcano erupts - Basalt, andesite, rhyolite etc. but Generically the rock coming out of a volcano is called lava rock (pahoehoe or aa) but one can also get pumice or ignimbrites.


What is a shield of a volcanos?

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What type of rocks from when magma erupts from undersea volcano?

All three rock types could be formed in areas under the seas. Two types of rock are most likely to form on the seafloor, however. Sedimentary rock is formed on the seafloor where accumulations of sediments undergo lithification processes. Extrusive igneous rock can form on the seafloor when lava erupts on its surface.


What type of igneous rock forms form lava or magma that erupts onto the earths surface?

extrusive igneous rock


What type of rock does rock turn into when it erupts?

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What type of rock does a volcano form?

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In general how do volcanoes form?

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