# A ubiquitous ~62-Myr periodic fluctuation superimposed on general trends in fossil biodiversity. I. Documentation

@inproceedings{Melott2011AU,
title={A ubiquitous ~62-Myr periodic fluctuation superimposed on general trends in fossil biodiversity. I. Documentation},
author={Adrian L. Melott and Richard K. Bambach},
booktitle={Paleobiology},
year={2011}
}
• Published in Paleobiology 24 May 2010
• Environmental Science, Geography
Abstract We use Fourier analysis and related techniques to investigate the question of periodicities in fossil biodiversity. These techniques are able to identify cycles superimposed on the long-term trends of the Phanerozoic. We review prior results and analyze data previously reduced and published. Joint time-series analysis of various reductions of the Sepkoski Data, Paleobiology Database, and Fossil Record 2 indicate the same periodicity in biodiversity of marine animals at 62 Myr. We have…

### An ubiquitous ~62 Myr periodic fluctuation superimposed on general trends in fossil biodiversity

• Environmental Science, Geography
• 2010
A 62 Myr periodicity is superimposed on other longer-term trends in fossil biodiversity and a significant excess of 19 previously identified Phanerozoic mass extinctions occur on the declining phase of the 62 Myr cycle.

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