Cenozoic Era

The Cenozoic Era is the current and most recent of the three major subdivisions of geological time. It began about 66 million years ago and continues to the present day. It is also known as the "Age of Mammals" because of the diversification and dominance of mammalian life forms during this era.

Study Guide

1. Overview: The Cenozoic Era is divided into three periods: the Paleogene, the Neogene, and the Quaternary. Each period is characterized by significant geological and biological events.
2. Geological Events: The Cenozoic Era is marked by the continued movement of the Earth's tectonic plates, leading to the formation of mountain ranges, volcanic activity, and the shaping of the Earth's current landforms.
3. Biological Evolution: The Cenozoic Era witnessed the diversification and evolution of mammals, birds, insects, and plants. Major evolutionary events include the rise of primates, the development of grasslands, and the emergence of modern flora and fauna.
4. Climate Change: The Cenozoic Era experienced significant climate fluctuations, including periods of global warming and cooling. These climatic changes had a profound impact on the evolution and distribution of life on Earth.
5. Impact Events: The Cenozoic Era was marked by several major impact events, including the Chicxulub impact that led to the extinction of the dinosaurs at the end of the Mesozoic Era.

Studying the Cenozoic Era provides valuable insights into the geological, biological, and environmental processes that have shaped the Earth's history and influenced the development of life as we know it today.