The Mesozoic Chronology Dataset

tardis The Mesozoic Era, spanning from approximately 252 to 66 million years ago, is chronologically divided into three distinct geologic periods: the Triassic, Jurassic, and Cretaceous. This "Age of Reptiles" began in the wake of the Permian-Triassic extinction event—the most severe mass extinction in Earth's history—which cleared the evolutionary stage for the rise of dinosaurs and early mammals. Over its 186-million-year span, the era witnessed profound paleogeographic shifts, moving from the initial breakup of the supercontinent Pangea to the gradual formation of the modern continents. gallifrey