Episodic nature of the Cenozoic marine record

Michael R. Rampino, Richard B. Stothers

Research output: Contribution to journalArticle


Various suggestions of a geological periodicity of 2–7 m.y. have been made in the literature. If such periods exist, they fall between the earth' orbital (Milankovitch) periods and the solar system's galactic (Oort) periods and have no known internal or external source. To study the period range 1–10 m.y., four types of Cenozoic marine data were subjected to formal time series analysis. No significant periodicities were found, and only a mean interval between global marine episodes (∼5 ± 2 m.y.) could be defined. Possible causes of the variability are discussed.

Original languageEnglish (US)
Pages (from-to)255-258
Number of pages4
Issue number3
StatePublished - Jun 1987


ASJC Scopus subject areas

  • Oceanography
  • Palaeontology

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