Ancient atmospheric CO2 pressures inferred from natural goethites

Details Ancient atmospheric CO2 pressures inferred from natural goethites Ancient atmospheric CO2 pressures inferred from natural goethites

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.355..342y&link_type=abstract

Nature (ISSN 0028-0836), vol. 355, Jan. 23, 1992, p. 342-344.

Biology

34

Atmospheric Composition, Carbon Dioxide Concentration, Geochronology, Paleobiology, Carbon Isotopes, Iron Compounds, Oxygen Isotopes, Radioactive Age Determination

Scientific paper

Data from goethites from an ironstone in the Upper Ordovician Neda Formation are presented which suggest that 440 Myr ago atmospheric P(CO2) was about 16 times higher than today. However, this enhanced level of atmospheric CO2 does not seem to have been accompanied by unusually warm temperatures in the tropics, and in fact may have been contemporaneous with high-latitude continental glaciation on Gondwanaland.

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