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Unusual layers in sediment cores may be a sign of an ancient tsunami
19 posted on
05/04/2009 1:47:41 PM PDT by
SunkenCiv
(https://secure.freerepublic.com/donate/____________________ Profile updated Monday, January 12, 2009)
Some researchers suspect a space impactor may have been involved
21 posted on
05/04/2009 2:10:55 PM PDT by
SunkenCiv
(https://secure.freerepublic.com/donate/____________________ Profile updated Monday, January 12, 2009)
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