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 b. Hawaii's Kilauea c. Mount St. Helens d. East African Rift e. Yellowstone f. Vesuvius g. Deccan Plateau 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
The following image shows the Buddhist monastery Taung Kalat, located in central Myanmar (Burma). The monastery sits high on a sheersided rock made mainly of magmas that solidified in the conduit of an ancient volcano. The volcano has since been worn away. a. Based on this information, what volcanic structure do you think is show in the photo? b. Would this volcanic structure most likely have been associated with a composite volcano or a cinder cone? Explain how you arrived at your answer.
Problem 7
Imagine that 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 9
Explain why an eruption of Mount Rainier would be considerably more destructive than the similar eruption of Mount St. Helens that occurred in 1980 .
Problem 11
Each of the following descriptions indicates how an intrusive feature appears when exposed at Earth's surface by erosion. Name the feature. a. A dome-shaped mountainous structure flanked by upturned layers of sedimentary rocks b. A vertical wall-like feature a few meters wide and hundreds of meters long c. A huge expanse of granitic rock forming a mountainous terrain tens of kilometers wide d. A relatively thin layer of basalt sandwiched between layers of sedimentary rocks exposed on the side of a canyon
