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 77.1 million years, it is the ninth and longest geological period of the entire Phanerozoic.The name is derived from the Latin creta, 'chalk', which is ...

2025年3月4日 · The Cretaceous environment Paleogeography. The position of Earth’s landmasses changed significantly during the Cretaceous Period—not unexpected, given its long duration.At the onset of the period there existed two supercontinents, Gondwana in the south and Laurasia in the north. South America, Africa (including the adjoining pieces of what are now the Arabian Peninsula and the Middle East ...

Tyrannosaurus Rex Tyrannosaurus rex arose during the Cretaceous period about 85 million years ago, and thrived as a top land predator until the dinosaurs went extinct 20 million years later. This ...

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.

Cretaceous翻译：白垩纪的;来自白垩的（白垩纪为距今约1.44亿年至0.65亿年前的地质时期，有花植物首次出现）。了解更多。

Durante o Cretáceo, os dinossauros alcançam seu ápice na escala evolutiva (mais da metade das espécies conhecidas viveram neste período), mas ao fim do período ocorreu a extinção em massa desses grandes répteis e de diversas espécies de animais da Terra (cerca de 60% deles foram extintos). Alguns peixes, que foram arrastados pela …

2023年4月27日 · During the Cretaceous, accelerated plate collision caused mountains to build along the western margin of North America. As these mountains were rising, the Gulf of Mexico basin subsided, and seawater began to spread northward into the expanding western interior.

Online exhibits: Geologic time scale: Mesozoic Era. The Cretaceous Period. The Cretaceous is usually noted for being the last portion of the "Age of Dinosaurs", but that does not mean that new kinds of dinosaurs did not appear then.

2022年7月26日 · The Cretaceous period was the last and longest segment of the Mesozoic era. It lasted approximately 79 million years, from the minor extinction event that closed the Jurassic period about 145 ...

Cretaceous翻译：白堊紀的；來自白堊紀的（白堊紀為距今約1.44億年至6500萬年前的地質時期，有花植物首次出現）。了解更多。