A 3,800-million-year isotopic record of life from carbon in sedimentary rocks

Details A 3,800-million-year isotopic record of life from carbon in sedimentary rocks A 3,800-million-year isotopic record of life from carbon in sedimentary rocks

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.333..313s&link_type=abstract

Nature, Volume 333, Issue 6171, pp. 313-318 (1988).

Mathematics

Logic

77

Scientific paper

An increased ratio of 12C to 13C, an indicator of the principal carbon-fixing reaction of photosynthesis, is found in sedimentary organic matter dating back to almost four thousand million years ago-a sign of prolific microbial life not long after the Earth's formation. Partial biological control of the terrestrial carbon cycle must have been established very early and was in full operation when the oldest sediments were formed.

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