Common Rock Types Colby Geology. Igneous Rocks Classification based on composition and texture. COMPOSITION Principally the rock-forming minerals.
Igneous Rocks Fire’s Within. Why Should We Study Rocks? It’s like a good history book – it tells us Earth’s long history.
CHAPTER 4 IGNEOUS ROCKS. Magma: The parent material of igneous rock Lava Extrusive – volcanic Intrusive – plutonic Nature of magma Melt Volatiles From.
Common Rock Types
