Figure 2
From: Generation of a galactic chronology with impact ages and spiral arm tangents
Change in Kuiper test statistic with modulo divisor (period, Myr). Note: The significance around 80 Myr occurs only for the largest impacts with a small sample size (n = 8). Three of the impacts have ages less than the modulo divisor (34.86, 36.63 and 66.038 Ma), i.e. their modulo ages are the same as their absolute ages. The average of their absolute ages (45.8 Ma) is equal to the average modulo ages of the other five largest impacts with a modulo divisor of either 164.28 Myr or 164.28 divided by 2 = 82.14 Myr.
