The Cretaceous (IPA: / k r ɪ ˈ t eɪ ʃ ə s / krih-TAY-shəss) [2] is a geological period that lasted from about 143.1 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 77 million years, it is the ninth and longest geological period of the entire Phanerozoic.

2025年1月29日 · Cretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era. It began 145 million years ago and ended 66 million years ago and featured the extinction of the dinosaurs at the end of the period.

The Cretaceous Period lasted for nearly 80 million years. Discover what the climate was like in this geological period, where the continents were and what animals and plants lived on them. Find out how an asteroid ended the age of dinosaurs.

2025年1月26日 · Cretaceous Period - Mesozoic, Paleogene, Cenozoic: The rocks that were either deposited or formed during the Cretaceous Period make up the Cretaceous System. The Cretaceous System is divided into two rock series, Lower and Upper, which correspond to units of time known as the Early Cretaceous Epoch (145 million to 100.5 million years ago) and ...

2022年7月26日 · The Cretaceous period lasted approximately 79 million years, and ended with a major extinction event about 66 million years ago.

2023年4月27日 · The main contender for the Cretaceous mass extinction event is a huge asteroid striking Earth about 66 million years ago. Eleven other impact structures are known from the Cretaceous, but none rival the terminal event of the Cretaceous.

During this period, oceans formed as land shifted and broke out of one big supercontinent into smaller ones. Continents were on the move in the Cretaceous, busy remodeling the shape and tone of...

2025年1月29日 · Cretaceous Period - Dinosaurs, Plants, Marine Life: Although the fossil record is irregular in quality and quantity for the Early Cretaceous, it is obvious that dinosaurs continued their lengthy dominance of the land.

2014年4月15日 · It is the last period of the Mesozoic Era, and, spanning 79 million years, the longest period of the Phanerozoic Eon. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels and creating numerous shallow inland seas.

2018年11月13日 · The Cretaceous Period facts for kids and adults. Welcome to the ultimate guide to the Cretaceous Period! The Cretaceous Period was the third and final period of the Mesozoic Era. During the Cretaceous Period dinosaurs continued to rule on land, while giant marine reptiles dominated the oceans.