👉 Cainozoic is a geologic period that lasted from approximately 340 to 250 million years ago. This time frame marks the transition from the Paleozoic era, which was characterized by the emergence of the first large animals, to the Mesozoic era, which saw the emergence of dinosaurs and the rise of mammals. During this period, the Earth's surface underwent a significant change in composition, with the formation of various sedimentary rocks that formed the basis of our
