Stothers 2006

Stothers, R.B., 2006: The period dichotomy in terrestrial impact crater ages. M. Not. Royal Astron. Soc., 365, 178-180, doi:10.1111/j.1365-2966.2005.09720.x.

Impact cratering on the Earth during the past 250 Myr has occurred with either of two apparent periodicities, ~30 or ~35 Myr, depending on the set of impact crater ages that is adopted. When the craters are segregated by size and the possible age errors are explicitly taken into account in the analysis, only the longer periodicity survives, and does so only in the case of the largest craters (diameters ≥ 35 km). Smaller craters exhibit no robust periodicity. Despite their relative abundance, the inclusion of data points for the small craters merely degrades, without shifting or destroying, the periodic signal of the largest craters when all of the craters are analysed together. The possible consequences for quasi-periodic Galactic perturbations of the Oort comet cloud are briefly discussed.

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Stothers, R.B.: The period dichotomy in terrestrial impact crater ages, M. Not. Royal Astron. Soc., 365, 178-180, doi:10.1111/j.1365-2966.2005.09720.x, 2006.

Stothers, R.B. (2006), The period dichotomy in terrestrial impact crater ages, M. Not. Royal Astron. Soc., 365, 178-180, doi:10.1111/j.1365-2966.2005.09720.x.

Stothers, R.B., 2006: The period dichotomy in terrestrial impact crater ages. M. Not. Royal Astron. Soc., 365, 178-180, doi:10.1111/j.1365-2966.2005.09720.x.

Stothers, R.B. 2006, M. Not. Royal Astron. Soc., 365, 178, doi:10.1111/j.1365-2966.2005.09720.x.

Stothers RB. The period dichotomy in terrestrial impact crater ages, M Not Royal Astron Soc 2006;365:178-180. doi:10.1111/j.1365-2966.2005.09720.x.

R.B. Stothers, M. Not. Royal Astron. Soc. 365, 178-180, doi:10.1111/j.1365-2966.2005.09720.x (2006).