2. Most of the Pacific Ocean is on what plate? 3. At which of the above boundaries is seafloor created?
4. At which of the above boundaries is seafloor destroyed?
5. Which of the above boundaries can produce earthquakes?
6. Which of the above boundaries can produce volcanoes?
7. What is the name of the small crustal plate off the Oregon coast
that is subducting under the North American plate?
8. Identify each type of Convergent Boundary and provide an exam-
ple.
9. Why is it that the Pacific Ocean floor is no older than about 200
million years and yet the continents are much older?
10. The continental margins of the East and West Coast of the United
States are very different. Describe the differences. Are there tectonic
differences?