The Paleogene Period (IPA: /ˈpeɪli.ədʒiːn, -li.oʊ-, ˈpæli-/ PAY-lee-ə-jeen, -⁠lee-oh-, PAL-ee-; also spelled Palaeogene or Palæogene) is a geologic period...

The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary (K–T) extinction, was a sudden mass extinction of three-quarters...

The Cretaceous–Paleogene (K–Pg) boundary, formerly known as the Cretaceous–Tertiary (K–T) boundary, is a geological signature, usually a thin band of...

surrounding areas. The date of the impact coincides with the Cretaceous–Paleogene boundary (commonly known as the K–Pg or K–T boundary). It is now widely...

Cretaceous—Paleogene (or K-Pg) extinction event by many researchers. Non-avian dinosaur fossils are found only below the Cretaceous–Paleogene boundary and...

period and system that spans 20.45 million years from the end of the Paleogene Period 23.03 million years ago (Mya) to the beginning of the present Quaternary...

dinosaurs, being one of the largest reptiles to evolve after the Cretaceous-Paleogene Extinction event. Its vertebrae are very robust and wide, with a pentagonal...

the Mesozoic and Paleozoic. The Cenozoic started with the Cretaceous–Paleogene extinction event, when many species, including the non-avian dinosaurs...

The Mid-Tertiary ignimbrite flare-up, was a dramatic period of volcanic eruptions in mid-Cenozoic time, approximately 25–40 million years ago, centered...

The Mammal Paleogene zones or MP zones are a system of biostratigraphic zones in the stratigraphic record used to correlate mammal-bearing fossil localities...