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Earthquake Genesis
The earthquake threat that hangs over Los Angeles came into being around 20 million years ago with a series of massive tectonic movements.
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Prehistoric Los Angeles:   Earthquake Genesis
The earthquake threat that hangs over Los Angeles came into being around 20 million years ago with a series of massive tectonic movements.
Aired: 3/14/11
Views: 274390
Network:  Discovery
 
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