Constraints on early Cambrian carbon cycling from the duration of the Nemakit-Daldynian–Tommotian boundary δ13C shift, Morocco

  title={Constraints on early Cambrian carbon cycling from the duration of the Nemakit-Daldynian–Tommotian boundary $\delta$13C shift, Morocco},
  author={A. Maloof and J. Ramezani and S. Bowring and D. Fike and S. Porter and Mohamed Mazouad},
The Nemakit-Daldynian–Tommotian (ND-T) boundary marks the first appearance of metazoan reefs and calcite biomineralizers and is associated with the largest δ 13 C shift during the Phanerozoic Eon. Biological transitions in Earth history are often accompanied by excursions in the carbon isotopic composition (δ 13 C) of the ocean, where δ 13 C variability is interpreted to reflect changes in the global carbon cycle. The duration and thus rate of these δ 13 C anomalies are rarely known, making it… Expand

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