Chapter 9 Volcanic Processes PRELAB STUDY SESSION In preparation to this exercise, briefly answer the following questions. Refer to your textbook for the information you need. In addition to these questions, your lab instructor might give you more questions to answer.
A. List and sketch the various type of volcanoes. Sketch them to scale with respect to each other.
B. What materials can a volcano erupt? It is not just lava. List volcanic products by composition and by type (tephra, size, volcanic gases, etc.).
C. Name some possible volcanic hazards.
D. The differences in volcanic behavior are due to the combination of many elements such as magma chemistry, volatiles in the magma, type of volcanic structure, and tectonic settings.
How can we study what volcanoes are doing? How can we deduce out what a volcano will do? Prior to the 1980 eruption, MSH had a conical, well-defined shape. During the 1980 eruption the upper 400 m of the summit was removed by slope failure, leaving a 2 × 3.5 km horseshoe-shaped crater now partially filled by a lava dome. Go to the Cascade Volcano Observatory website to see images of MSH before and after the eruption:
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