Earth

1
Earths Structure Makeup Plate Tectonics

• Created by Gavyn, Paige Whitney

2
Structure of the Inner Earth

• The Earth is made up of 6 main layers.
• Lithosphere, Asthenosphere, Mantle, Crust, molten
  Outer Core, and solid Inner Core.

3
Who Discovered?

• Sir Harold Jefferys introduced idea of exploring
  Earths interior structure by way of seismic
  waves created by explosions near the surface of
  Earth.

4
P and S waves
Primary wave
Shear Wave
5
A map of the Plates
6
Continental Drift

• Defined as gradual movement of the continents
  across the Earths surface through geological
  time.
• Theory most sourced to Alfred Wegener.

Alfred Wegener
7
Pangaea

• Pangaea was a super continent that existed 200 ma
  ago.
• It began breaking up 175 ma ago.