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Any rock created by the cooling of magma or molten material is classified as an igneous rock. These rocks can either be cooled in the earth or on the earths surface. Rocks cooled inside the earth are called intrusive igneous rocks, and have large crystals. Rocks cooled on the earth's surface are called extrusive igneous rocks. These rocks, due to faster cooling times, have very very tiny crystals.

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What rock form from molten?

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Once molten rock has erupted and solidified, it is called lava.


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The igneous rock is formed when a rock that is solidified from molten or partly molten matierial.


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Both lava and pyroclastic material are classified as rocks. Lava is molten rock and pyroclastic material is various debris. There is Basaltic lava, Andesitic lava, Dacite lava, and Rhyolitic lava.


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