Computer Science
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.302..518w&link_type=abstract
Nature (ISSN 0028-0836), vol. 302, April 7, 1983, p. 518-520.
Computer Science
21
Carbon Dioxide Tension, Marine Chemistry, Planetary Evolution, Precambrian Period, Sea Water, Barium, Calcium Carbonates, Hydrogen Ions, Silicon Dioxide, Sulfates
Scientific paper
The potential impact of high carbon dioxide partial pressure on ocean chemistry is examined in order to investigate what constraints are imposed by the known record of chemical sedimentation through time. The evidence consists of the persistence of calcium carbonate and sulfate precipitation throughout almost the entire sedimentary rock record. A uniformitarian point of view that assumes no very great change in the conditions for the deposition of these chemical sediments. The methods of Holland (1972) are used to set limits on the composition of the water from which precipitation occurred. No inconsistencies between the sedimentary rock record and presumed higher partial pressure of carbon dioxide early in earth history, provided that high partial pressure was accompanied by a generally lower pH for seawater, higher concentrations of calcium and biocarbonate ions, and lower concentrations of carbonate and sulfate ions.
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