Isotopes, Ice Ages, and Terminal Proterozoic Earth History

Details Isotopes, Ice Ages, and Terminal Proterozoic Earth History Isotopes, Ice Ages, and Terminal Proterozoic Earth History

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pnas...94.6600k&link_type=abstract

Proceedings of the National Academy of Sciences of the United States of America, Volume 94, Issue 13, pp. 6600-6605

Physics

38

Scientific paper

Detailed correlations of ancient glacial deposits, based on temporal records of carbon and strontium isotopes in seawater, indicate four (and perhaps five) discrete ice ages in the terminal Proterozoic Eon. The close and repeated stratigraphic relationship between C-isotopic excursions and glaciogenic rocks suggests that unusually high rates of organic carbon burial facilitated glaciation by reducing atmospheric greenhouse capacity. The emerging framework of time and environmental change contributes to the improved resolution of stratigraphic and evolutionary pattern in the early fossil record of animals.

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