What kind of rocks are igneous rocks?

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Igneous rocks are those that have solidified from molten rock, such as pumice, granite, basalt, obsidian, rhyolite.
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How many kinds of igneous rocks are there?

There are two classifications of igneous rocks: extrusive, those formed on the surface, and intrusive, those formed underground. The most common igneous rock is basalt, follow
In Geology

What is an example of a kind of igneous rock?

Any rock that erupted on (lava) or within the Earth or crystallizedfrom molten rock (magma). Such rock would fall into two categories:Intrusive (crystallized within the Earth)