Eric Walker added Mesozoic - Wikipedia to Mesozoic

Eric Walker added Cretaceous–Paleogene boundary and Upper Cretaceous and a number of links to Cretaceous, and added Cretaceous to Geologic time scale (GTS) and Mesozoic

Eric Walker added End-Triassic extinction and Permian-Triassic mass extinction and Triassic - Wikipedia to Triassic, and added Triassic to Mesozoic

Eric Walker added Cretaceous and Triassic and Mesozoic - Wikipedia to Mesozoic, and added Mesozoic to Phanerozoic

Eric Walker added Paleozoic era, Cenozoic and Mesozoic and Phanerozoic - Wikipedia and Cenozoic - Wikipedia to Phanerozoic, and added Phanerozoic to Geologic time scale (GTS)