GEO STUFF
Storyboard Text
- Oh No! What's happening, Jeff?!
- The plates are diverging!!! Please fix it Prof. Brave!!
- Let me help you out.
- Please do, It's moving fast!!!
- There we go, now please explain what you mean't by 'plates'?
- Never heard of him. What was his job?
- OK, it all started with Alfred Wegener and his observations.
- He was a meteorologist but was a very open-minded person.
- OK, and how did he contribute to figuiring out why earthquakes happen?
- He first saw that some of the continents looked liked they could fit perfectly together.
- He theorized that the continents could have once been all connected and spread out over millions of years. He called this 'supercontinent' Pangaea.
- The looked further an fond ourt that fossils and plants that were similar were found oceans apart.
- What!? Why did they decline his ideas?
- But when he proposed is ideas, the geography community laughed at him and didn't give him any support.
- But when Harry Hess was doing some scouting for the navy during WWII and he found the mechanism that could explain Wegener's theory.
- Because there was no way to explain how the continents could move. Only was after 30 years from his death was that his theories were proved.
- What was the mechanism?
- So it all worked out in the end didn't t?
- Hess called it 'seafloor spreading' and it happens because of heat coming from the core and pushing it up. These are called convection currents.
- So it did.
- This also brought new theories and figured out; convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other.
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