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![](v3_space.gif) |
![](v3_space.gif) |
![](v3_space.gif) |
![](v3_space.gif) |
![](v3_space.gif) |
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The lithospheric plates are
riding on top of a layer of hot,
ductile, easily
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deformed material called the asthenosphere, or “weak layer”.
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Heat moves by conduction
above 100 km and by convection below 100 km.
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Temperature at the center of
the earth is believed to close to 5000ºC.
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