Mathematics – Logic
Scientific paper
Nov 1959
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1959gecoa..17..201t&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 17, Issue 3-4, pp.201-208
Mathematics
Logic
5
Scientific paper
The uranium concentrations in marine calcareous material of a biological origin varied between 0.0X and 0.X p.p.m. with the exception of corals which had concentrations of several p.p.m. The aragonitic oolites and aragonite precipitated from sea-water had values similar to those of the corals. A geochronology based on the growth of ionium (thorium-230) from uranium is applicable not only to corals, as previous investigators have pointed out, but also to oolites. Several examples of "oolite ages" are given. The uranium content of ferromanganese minerals from pelagic deposits is of the order of from 4 to 5 p.p.m.
Goldberg David E.
Tatsumoto Mitsunobu
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