Re: Great size and oxygen content of the atmosphere

[JohnE37179@aol.com]

>During a Historical Geology class the professor stated during the 
>Cretaceous, cocoliths (calcium carbonate critters) were so numerous that 

>the oxygen to carbon dioxide ratios became inbalanced, producing a 
higher 
>than normal oxygen levels.

Wouldn't his indicate the opposite? Greater sedementation of carbonates would
indicate great soluble carbon dioxide in sea water - therefore higher
concetrations in the atmosphere.  Just a passing thought.