Problem 1
Match each of these volcanic regions with one of the three zones of volcanism (convergent plate boundaries, divergent plate boundaries, or intraplate volcanism): a. Crater Lake e. Yellowstone b. Hawaii's Kilauea f. Vesuvius c. Mount St. Helens g. Deccan Plateau d. East African Rift h. Mount Etna
Problem 3
Divergent boundaries, such as the Mid-Atlantic ridge, are characterized by outpourings of basaltic lava. Answer the following questions about divergent boundaries and their associated lavas: a. What is the source of these lavas? b. What causes the source rocks to melt? c. Describe a divergent boundary that would be associated with lava other than basalt. Why did you choose it, and what type of lava would you expect to erupt there?
Problem 4
Explain why volcanic activity occurs in places other than plate boundaries.
Problem 6
Assume you want to monitor a volcano that has erupted several times in the recent past but appears to be quiet now. How might you determine if magma were actually moving through the crust beneath the volcano? Suggest at least two phenomena you would observe or measure.
Problem 7
Imagine you are a geologist charged with the task of choosing three sites where state-of-the-art volcano monitoring systems will be deployed. The sites can be anywhere in the world, but the budget and number of experts you can employ to oversee the operations are limited. What criteria would you use to select these sites? List some potential choices and your reasons for considering them.
Problem 8
Explain why an eruption of Mount Rainier, similar to the one that occurred at Mount St. Helens in \(1980,\) would be considerably more destructive.
