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Re: DINOSAUR digest 1201

"James R. Cunningham" <jrccea@bellsouth.net> wrote:

>>>the oxygen content of the somewhat more dense
atmosphere was about 25%, which is about 25% higher than now, that it
was already falling toward the present level, and had been doing so
for some time.>>>

I understand the oxygen content of the atmosphere at present to be 
about 21%.  

If the O2 content of the Cretaceous were 25% (and amber studies are 
highly questionable in this regard), it is still no 25% higher than 
what we have now; it is about 4% higher.  

I think.

John C. McLoughlin
Taos, New Mexico