1. Slow Motion on Planet Earth Chapter 1 Section 2

2. Tectonic Plates
Pieces of Earth’s Crust
12+ major plates

3. Pangaea
“Super-Continent”
~250 million years ago

4. Theory of Plate Tectonics
Earth’s plates move slowly in different directions
Divergent
Move away
Convergent
Move into
Transverse
Move along

5. How Fast Do Plates Move??? Slow plates… Fast plates…
1-2 mm’s per year
Fast plates…
5-6 cm’s per year
About as fast as your finger nails grow 

6. San Andreas Fault, CA L.A. is on the Pacific Plate
Moving NNW at 3 cm’s per year
San Francisco is on the N. American Plate
Moving SSE at 2 cm’s per year
Now…
544 km apart
In 10 million years
Side by side