This chapter explores volcanism. The textbook already addressed how igneous rocks form and this chapter helps us see how rocks formed from magma cool below volcanoes and rocks formed from lava create ...This chapter explores volcanism. The textbook already addressed how igneous rocks form and this chapter helps us see how rocks formed from magma cool below volcanoes and rocks formed from lava create the volcano or volcanic feature. As part of this the relationships volcanoes have with plate tectonics, magma compositions, eruption style/violence, types of volcanic features, and volcanic hazards are explored.