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To: Lazarus_Long who wrote (13404)5/25/2002 1:26:06 AM
From: average joe  Respond to of 21057
 
Some think that kimberlite melts tend to get active every 60 million years or so, Tunguska could have been the first of a new era. They also tend to come up in a cluster pattern. Pulses of kimberlite tend to occur in the same places and the Tunguska area is close to the Yakutia kimberlite fields of Siberia. A big kimberlite would cause mass extinction and level trees for thousands of miles around.


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