A new approach to the calculation of the cratering rate of the Earth over the last 125+/-20Myr

Details A new approach to the calculation of the cratering rate of the Earth over the last 125+/-20Myr A new approach to the calculation of the cratering rate of the Earth over the last 125+/-20Myr

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.317..429h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 317, Issue 2, pp. 429-437.

Astronomy and Astrophysics

Astronomy

15

Earth

Scientific paper

The recent cratering record of the surface of the Earth is re-examined using a new technique that concentrates on estimating the mean areas occupied by individual craters, together with the gradients of linear plots of crater numbers versus crater ages. This analysis indicates that the lower limit of the rate at which craters have been produced over the last 125+/-20Myr is, for example, (12.0+/-0.7)×10-15km-2yr-1 for D>=2.4km craters, (9.5+/-0.6)×10-15km-2yr-1 for D>=5.0km craters, (6.5+/-0.5)×10-15km-2yr-1 for D>=12km craters, and (3.0+/-0.3)×10-15km-2yr-1 for D>=22km craters. These figures indicate that previous researchers have considerably overestimated the rate at which small (2.4

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