Boltysh crater Boltysh crater The Boltysh Crater (Bovtyshka Crater) is an impact crater in the Kirovohrad Oblast of Ukraine, near the village of Bovtyshka. The crater is in diameter and its age of 65.17 ± 0.64 million years, based on argon dating techniques, is within error of that of Chicxulub Crater in Mexico, and the Cretaceous–Paleogene boundary (K–Pg boundary). The Chicxulub impact is believed to have caused the mass extinction at the end of the Cretaceous period, which included the extinction of the dinosaurs. The Boltysh impact likely occurred several thousand years before Chicxulub, suggesting the extinction event may have been driven
Liverpool crater event to form the rim. Flat-lying and non-deformed sandstone that must have been deposited after the impact event is exposed within the crater's center. Because the crater is quite well preserved, it can be argued that it was buried by younger sedimentary rock soon after the impact event; this younger rock has now been mostly eroded away except in the crater center. The crater-filling sandstone was originally thought to be of Cretaceous age, leading to the Cretaceous age listed for the crater in older literature sources. But more recent studies suggest that the infilling rock is more likely to be