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basalt

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Lewis Streich

Lvl 13
2y ago
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Wiki User

7y ago

Technically, magma that reaches the surface is called lava. When lava cools, it forms what is known as extrusive igneous rock. Examples of extrusive igneous rock include basalt, obsidian, pumice, rhyolite, and scoria.

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13y ago

That would depend upon the type of material that is being cooled. Composition generally dictates the rock type. Lavas are extrusive and generally fall into three categories. More naming differentiation can be given within each group.

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Wiki User

7y ago

Any igneous rock that forms on the surface is considered extrusive. The most common igneous rock to form from lava is basalt.

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7y ago

An igneous rock formed from magma is intrusive.

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12y ago

Extrusive igneous rock

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13y ago

extrusive igneous rock

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Wiki User

15y ago

Basalt.

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Q: What is a igneous rock formed from magma?
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