+**Extrusive rock** forms when molten [lava](/wiki/lava) erupts onto the Earth's surface and cools quickly. This rapid solidification often leads to fine-grained or glassy textures, as crystals have little time to grow. It is a fundamental type of [igneous rock](/wiki/igneous_rock), shaping landscapes after volcanic events.
+## See also
+- [Intrusive Rock](/wiki/intrusive_rock)
+- [Magma](/wiki/magma)
+- [Volcano](/wiki/volcano)
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