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The World Before Plate Tectonics
The World Before Plate Tectonics
The World before Plate Tectonics
https://www.youtube.com/watch?v=DI6SemRT2iY&t=216s
1. What is the “Boring Billion”? What was its time span? What were the conditions like
then?
2. What happened to most of the Archean rocks?
3. How hot was the mantle in the Archean? What did it do to the Archean crust?
4. What supercontinent formed about 1.8 b.y. ago?
5. What were the key gases in the ocean by about 1.8 b.y. ago? What kinds of life
dominated in the Proterozoic oceans?
6. What was plate tectonics like about 700 m.y. ago? What happened to Rodinia after this
time?
7. How does the breakup of a supercontinent change the conditions for life?
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