What are the 4 types of igneous rocks

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There are mainly two types of igneous rock:
Intrusive/ plutonic Rocks. These are formed when the hot molten rock (magma) cools down slowly beneath the earth's crust and solidifies into rocks. ...
Extrusive/ volcanic Rocks. ...
Andesite. ...
Basalt. ...
Diorite. ...
Fire opal. ...
Gabbro. ...
Granite.

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Updated: 2019/10/18

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