The isotopic constitution of carbon in ancient rocks as an indicator of its biogenic or nonbiogenic origin

Details The isotopic constitution of carbon in ancient rocks as an indicator of its biogenic or nonbiogenic origin The isotopic constitution of carbon in ancient rocks as an indicator of its biogenic or nonbiogenic origin

Mar 1954

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1954gecoa...5..142r&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 5, Issue 3, pp.142-152

Mathematics

Logic

3

Scientific paper

The geologic and isotopic evidence serving to indicate the biogenic or nonbiogenic origin of carbon in rocks is discussed. A lower limit of the 12 C/ 13 C ratio of biogenic carbon is placed at 90·5. It is concluded that, in the absence of contradicting geologic evidence, carbon in shales, slates, and schists is biogenic if its isotopic constitution falls into the biogenic range.

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