Answer: The three main types of igneous rocks are intrusive igneous rocks (e.g., granite), extrusive igneous rocks (e.g., basalt), and pyroclastic rocks (e.g., obsidian).
List three examples of extrusive igneous rocks. Answer: Basalt, Rhyolite, Obsidian (or Pumice, Scoria). chapter 3 section 3.2 igneous rocks worksheet answers