Igneous Rocks (a bit more detail)
*Formed from lava or magma (Both are molten or liquid rock)
*Magma= underground
*Lava = above ground
*2 basic types of igneous rock
*Intrusive/Plutonic– form when magma cools
•Large crystals (coarse-grained)
*Extrusive/Volcanic– form when lava cools
•Small crystals (fine-grained)
*Think: Why are the crystal sizes different?
Basalt, Granite Biotite Hornblende, Rhyolite, Gabbro, and Diorite