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Nature 450, 807-808 (6 December 2007) | doi:10.1038/450807a; Published online 5 December 2007
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Palaeoclimate: Slush find
Alan J. Kaufman1
Abstract
A coupled model of palaeoclimate and carbon cycling turns up the heat on the idea that Earth once became a giant snowball. It supports instead a milder 'slushball Earth' history — but piquant questions remain.
Sediments laid down in the oceans during the late Neoproterozoic era, between about 850 million and 542 million years ago, tell a dramatic story. They contain wildly varying abundances of the carbon isotope 12C, which is typically incorporated into organic matter during photosynthesis.
- Alan J. Kaufman is in the Geology Department, University of Maryland, USA, and is currently on sabbatical at the Geologisch–Paläontologisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstra
e 24, 48149 Münster, Germany.
Email: kaufman@geol.umd.edu
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