Elevated Eocene Atmospheric CO2 and Its Subsequent Decline
Closing paragraph: Estimates of early Eocene atmospheric CO2 from Green River sodium carbonates are in the same range as those predicted by geochemical models (7). By È20 Ma, all available data (8) suggest ECO2^atm was at or near modern concentrations.
Credits: 29 SEPTEMBER 2006 VOL 313 SCIENCE
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