J/A+A/321/L33 J/A+A/321/L33 Terrestrial impact cratering rate L Jetsu Astron. Astrophys. 321, L33 ??? ??? 1997 1997A&A...321L..33J Earth comets: general Earth methods: statistical solar neighborhood The most significant periodicities in the terrestrial impact crater record are due to the "human-signal": the bias of assigning integer values for the crater ages. This bias seems to have eluded the proponents and opponents of real periodicity in the occurrence of these events, as well as the theorists searching for an extraterrestrial explanation for such periodicity. The "human-signal" should be seriously considered by scientists in astronomy, geology and paleontology when searching for a connection between terrestrial major comet or asteroid impacts and mass extinctions of species.

Seq Sequential number --- Name Crater name --- Country Country --- t Age of the impact crater Myr e_t rms uncertainty on age Myr et1/et2 (e_t1/e_t2) for combined events Myr Diam Diameter km D1/D2 (D1/D2) for combined events km Loc Location for combined events --- C1 Y: in the C1 sample --- C2 Y: in the C2 sample --- C3 Y: in the C3 sample --- C4 Y: in the C4 sample --- C5 Y: in the C5 sample --- C6 Y: in the C6 sample --- table1.texLaTeX version of table1 Patricia Bauer CDS 1997May23Lauri J. Jetsu <jetsu@norsg1.nordita.dk> J_A+A_321_L33.xml