Danian

The Danian is the oldest age or lowermost stage of the Paleocene epoch or series, the Paleogene period or system and the Cenozoic era or erathem. The beginning of the Danian age (and the end of the precessing Maastrichtian age) is at the Cretaceous–Paleogene extinction event 65.5±0.3 Ma. The age ended 61.7±0.2 Ma, being followed by the Selandian age.