Across
- 1. earthquakes and volcanoes help explain the locations of this
- 3. neither S-waves nor P-waves are found in this zone
- 4. this type of volcano has a broad base and gently sloping sides
- 8. a chain of __________ forms when an oceanic plate subducts
- 9. shield volcanoes produce this type of lava
- 10. the deepest earthquakes occur at this boundary type
- 13. Mt. Saint Helens is this type of volcano
- 14. this is the cause of most major earthquakes at their faults
- 15. two plates slide past eachother
Down
- 1. blocks, bombs and ash are all examples of _________ materials.
- 2. one station can determine the _______ to an earthquake
- 5. a _______ of geologic activity is NOT found at plate boundaries
- 6. as silica content increases magma flows _______ easily.
- 7. Mt.Saint Helens and Rainier are found here
- 8. at a subduction zone a _________ is likely to form on the overriding plate
- 11. Iceland is one of the few places a mid ocean ridge is ________ sea level.
- 12. measures earthquake magnitude
