The document provides evidence for plate tectonics, including Wegener's early ideas about fitting continents together which lacked an explanation for the mechanism of movement, followed by new evidence such as seafloor spreading detected through ocean drilling and patterns in earthquakes and hot spots that support the theory of plates moving due to processes like mantle convection, ridge push and slab pull.

1. Evidence for Plate Tectonics The Old Stuff and The New Stuff

2. Wegener’s Evidence The Old Stuff It was MY idea!

3. Puzzle Fit Continents

4. Mesosaurus Fossils

5. Mountain Range Evidence

7. Problem with Wegener’s Stuff No Mechanism Oh . . . Phooey!

8. New Evidence for Plate Tectonics The New Stuff

10. Seafloor Spreading 5 2 1 4 3

11. Mantle Convection Convergent Divergent Ridge Push Upward Arm Slab Pull Downward

13. Earthquake Data

14. Hot Spots To get a chain of volcanoes, the plates MUST be moving! I knew it!

15. Ocean Drilling

16. Do you believe in Plate Tectonics?

17. Where are we going from here?