There is a period of time that ends at the beginning of the Neogene Period Mya called Paleogene.
The Neogene ( [ pronˈniːəˌdʒiːn ] ) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya ) to the beginning of the present Quaternary Period Mya . The Paleogene ( [ pronˈpæliːədʒiːn ] or [ ˈpeɪliːədʒiːn ] also spelled Palaeogene or Palæogene ; informally Lower Tertiary ) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago ( Mya ) to the beginning of the Neogene Period Mya . A geologic period is one of several subdivisions of geologic time enabling cross-referencing of rocks and geologic events from place to place .