* Volcanic igneous rocks are formed when magma cools quickly at the Earth's surface. These rocks are typically fine-grained, with crystals that are too small to be visible to the naked eye. Some common examples of volcanic igneous rocks include basalt, andesite, and rhyolite.
What are the 2 types of igneouse rock?
* Plutonic igneous rocks are formed when magma cools slowly beneath the Earth's surface. These rocks are typically coarse-grained, with crystals that are visible to the naked eye. Some common examples of plutonic igneous rocks include granite, diorite, and gabbro.