An ∼60-Million-Year Periodicity Is Common to Marine 87Sr/86Sr, Fossil Biodiversity, and Large-Scale Sedimentation: What Does the Periodicity Reflect?

  title={An ∼60-Million-Year Periodicity Is Common to Marine 87Sr/86Sr, Fossil Biodiversity, and Large-Scale Sedimentation: What Does the Periodicity Reflect?},
  author={Adrian L. Melott and Richard K. Bambach and Kenni D. Petersen and John M. McArthur},
  journal={The Journal of Geology},
  pages={217 - 226}
We find that the marine 87Sr/86Sr record shows a significant periodicity of m.yr. The 87Sr/86Sr record is out of phase with a 62 (±3)-m.yr. periodicity previously reported in the record of marine animal diversity. These periodicities are close to 58 (±4)-m.yr. cycles found for the number of gap-bounded sedimentary carbonate packages of North America. We propose that these periodicities reflect the operation of a periodic “pulse of the earth” in large-scale earth processes. These may be linked… 

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