Chapter 4! Igneous Rocks
Magma Deferentiation
Igneous Rocks. Igneous rocks Form from “magma” (molten rock) “Lava” is magma that reaches the surface and looses gas (mostly water and CO 2 ) Magma that.
Intrusive igneous rocks form when magma cools within existing rocks in Earth’s crust. Extrusive igneous rocks form when magma cools on Earth’s surface,
