HW#6: Plate Tectonics
Instructions: Answer the questions below using one to five sentences.
13. What is the age of the oldest sediments recovered using deep-ocean drilling? How do the ages of these sediments compare to the ages of the oldest continental rocks?
14. How do sedimentary cores from the ocean floor support the concept of seafloor spreading?
15. Describe how Fred Vine and D. H. Matthews related the seafloor-spreading hypothesis to magnetic reversals.
16. What do transform faults that connect spreading centers indicate about plate motion?
17. Define slab pull and ridge push. Which of these forces contributes more to plate motion?
18. What geologic processes are associated with the upward and downward circulation in the mantle?