Re: Milankovich Cycles

[N.MacLeod@xxxxxxxxx (N. MacLeod)]

I did not say, and would never claim, that birds were the direct
descendents of Maastrchtian dinosaurs.  However, there is a closer
relationship between birds and T. rex than there is between T. rex and
Triceratops horribilis, both of which are Maastrichtian dinosaurs.


Norm MacLeod




>Norm MacLeod wrote
>>Of course clade membership per se has no bearing whatsoever on extinction
>>suseptibility (though that membership usually carries with it a large
>>amount of morphological, ecological, behavioral, etc. information that does
>>bear in the question of extinction suseptibility).  Nevertheless,
>>statements such as "the dinosaurs went extinct at the K-T boundary" imply
>>that neither the dinosaurs nor any of their direct descendents are to be
>>found in Tertiary sediments.  This is simply false.
>
>Birds are not direct descendants of Maastrichtian dinosaurs.



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Norman MacLeod
Senior Scientific Officer
N.MacLeod@nhm.ac.uk (Internet)
N.MacLeod@uk.ac.nhm (Janet)

Address: Dept. of Palaeontology, The Natural History Museum,
         Cromwell Road, London, SW7 5BD

Office Phone: 071-938-9006
Dept. FAX:  071-938-9277
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