kreetakaudenpaleogeenisen

Kreetakaudenpaleogeenisen refers to the geological period encompassing the late Cretaceous and the Paleogene epochs. This extensive timeframe spans roughly from 100.5 million to 23.03 million years ago, covering a significant portion of the Mesozoic and Cenozoic eras. The Cretaceous period is known for the dominance of dinosaurs, the emergence of flowering plants, and the breakup of the supercontinent Pangaea. It concluded with the K-Pg extinction event, famously marked by the impact of an asteroid, which led to the demise of most non-avian dinosaurs and many other species.

The Paleogene period began in the aftermath of this mass extinction. It witnessed the rapid diversification and rise of mammals, birds, and teleost fish, filling ecological niches left vacant by the extinct reptiles. Major geological events during the Paleogene included the continued fragmentation of continents, the formation of mountain ranges like the Alps and the Himalayas due to tectonic plate collisions, and significant climatic shifts. The Paleogene is further divided into the Paleocene, Eocene, and Oligocene epochs, each characterized by distinct faunal and floral developments and environmental conditions, setting the stage for the Neogene period that followed. Understanding this combined period is crucial for comprehending the evolutionary trajectory of life on Earth and the planet's geological history.