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Showing 2013 · astro-ph.EPShow all
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astro-ph.EP2013★ 8 cited
Cosmogenic nuclide enhancement via deposition from long-period comets as a test of the Younger Dryas impact hypothesis
Andrew C. Overholt, Adrian L. Melott
We explore the idea that detectable excursions in 26Al may arise from direct deposition by any bolide, and excursions in 14C and 10Be abundances in the atmosphere may result from l…
astro-ph.EP2013★ 24 cited
Do Periodicities in Extinction -- with Possible Astronomical Connections -- Survive a Revision of the Geological Timescale?
Adrian L. Melott, Richard K. Bambach
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 e…