1. Plate Tectonics
July 29, 2019

5. Pangaea
Wegener and the theory of Continental drift – that the continents were once together in a “supercontinent” called Pangaea
Evidence:
Fossil correlation
Glacial evidence in lower latitudes and tropical deposits in higher latitude regions
Controversial theory not accepted by most scientists
Wegener could not come up with a way to explain how the continents moved

7. Layers of the Earth
The Earth’s plates are made up of a layer that includes the upper mantle and the crust. This layer is called the lithosphere.

8. The Earth’s Plates
The Earth’s lithosphere is made of 7 major plates and several smaller ones

9. Plate Boundaries Divergent Convergent Transform Two plate move apart
Two plates move together
Transform
Two plates slide past each other

10. Divergent Boundary
Seafloor spreading and rifting – Ex: Iceland and Africa

11. Convergent Boundary The “Ring of Fire” around the Pacific plate
Subduction: Oceanic plate sinks under continental plate
Himalayas and Mt Everest
Indian plate is colliding with the Eurasian plate

12. Transform Boundary
San Andreas fault – the western part of central and southern California is moving north relative to the rest of California
Video

13. Hotspots
Hawaii – the Pacific plate is moving across a fixed zone of hot magma

15. Questions WRITE OUT ALL QUESTIONS AND ANSWERS : Pg 253 #1-4