4: Volcanism
- Page ID
- 33104
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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.
- 4.1: Plate Tectonic Settings of Volcanism
- The relationships between plate tectonics and volcanism, including the various mechanisms for the formation of magma and the evolution of that magma prior to the volcanic eruptions.
- 4.2: Magma Composition and Eruption Style
- A review of the range of magma compositions at different types of volcanoes, how magma evolves within magma chambers, and the relationships between magma composition, viscosity, and gas content and eruption style.
- 4.3: Types of Volcanism
- A summary of the various types of volcanoes that form in different volcanic settings, their typical sizes and shapes and their eruption characteristics. Examples of each type are also described.
- 4.4: Volcanic Hazards
- A review of the common types of hazards associated with different types of volcanic eruptions, and the direct and indirect effects that these can have on human populations, infrastructure and the environment.