Isotopes, Ice Ages, and Terminal Proterozoic Earth History
Kaufman, Alan J.
Narbonne, Guy M.
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CitationKaufman, Alan J., Andrew H. Knoll, and Guy M. Narbonne. 1997. Isotopes, ice ages, and terminal Proterozoic earth history. Proceedings of the National Academy of Sciences of the United States of America 94, no. 13: 6600-6605.
AbstractDetailed correlations of ancient glacial deposits, based on temporal records of carbon acid 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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