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Re: Dino Demise by Angiosperms



Furthermore (in North America at least) the gymnosperms increase sharply at
the K/T-boundary (first the fern spike and then conifers replace
angiosperms as dominant trees). 

Tommy Tyrberg


>In a message dated 12/18/00 12:00:29 PM Eastern Standard Time, 
>dagmardragonlady@hotmail.com writes:
>> I ran across an interesting theory on how dinos bit the dust.  It had to
do 
>>  with the rise of Angiosperms, and the decline of Gymnosperms, the then
major 
>>  food supply for many Cretaceous dinosaurs.
>Not to be rude, but I have to say I think this is very unlikely, for two
main 
>reasons:  first, dinosaurs and angiosperms coexisted quite well for tens of 
>millions of years (at least 60 million); second, there remain to this day 
>vast ecosystems dominated, at least as far as the large tree niche is 
>concerned, by gymnosperms.--Nick Pharris