DO PERIODICITIES IN EXTINCTION—WITH POSSIBLE ASTRONOMICAL CONNECTIONS—SURVIVE A REVISION OF THE GEOLOGICAL TIMESCALE?

A major revision of the geological timescale was published in 2012. We re-examine our past finding of a 27 Myr periodicity in marine extinction rates by re-assigning dates to the extinction data used previously. We find that the spectral power in this period is somewhat increased, and persists at a...

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Bibliographic Details
Published in:The Astrophysical journal 2013-08, Vol.773 (1), p.1-5
Main Authors: Melott, Adrian L, Bambach, Richard K
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Bandwidth
DUSTS
Extinction
GEOLOGIC SURVEYS
Geology
HYPOTHESIS
Marine
PERIODICITY
REVIEWS
Spectra
Time series
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Summary:A major revision of the geological timescale was published in 2012. We re-examine our past finding of a 27 Myr periodicity in marine extinction rates by re-assigning dates to the extinction data used previously. We find that the spectral power in this period is somewhat increased, and persists at a narrow bandwidth, which supports our previous contention that the Nemesis hypothesis is untenable as an explanation for the periodicity that was first noted by Raup & Sepkoski in the 1980s. We enumerate a number of problems in a recent study comparing extinction rates with time series models.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/773/1/6