Re: Extinction scenarios

["Jerry D. Harris" <102354.2222@compuserve.com>]

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Message text written by INTERNET:TomHopp@aol.com

" Excellent point. In addition to horrendous seismic quaking at the
antipode,"


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        I don't think there would be a tremendous amount of seismic
activity at the antipode -- S-waves can't travel through liquid, such as
the outer core, and thus aren't transmitted _at_all_, and P-waves are
refracted through the differing densities of various layers in the mantle
and outer and inner cores, leaving few to propigate directly to the
antipode.  

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                     Jerry D. Harris
                 Fossil Preparation Lab
          New Mexico Museum of Natural History
                   1801 Mountain Rd NW
               Albuquerque  NM  87104-1375
                 Phone:  (505) 899-2809
                  Fax:  (505) 841-2866
               102354.2222@compuserve.com