Cretaceous - Wikipedia
The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- …
Cretaceous Period | Definition, Climate, Dinosaurs, & Map ...
Nov 4, 2025 · 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 …
The Cretaceous Period: What was Earth like before dinosaurs ...
When was the Cretaceous Period? The Cretaceous is a geological period that began 145 million years ago and ended 66 million years ago. It is the last period in the Mesozoic Era. It comes …
Cretaceous Period—145.0 to 66.0 MYA - U.S. National Park ...
Apr 27, 2023 · In 1882 a Belgian geologist, Omalius d’Halloy, proposed the term “Cretaceous” for strata encircling the Paris Basin in France. The term derives from the Latin word for chalk …
Cretaceous Period Facts and Information | National Geographic
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 …
The Cretaceous Period - University of California Museum of ...
The Cretaceous is defined as the period between 145.5 and 65.5 million years ago,* the last period of the Mesozoic Era, following the Jurassic and ending with the extinction of the …
Cretaceous period: Animals, plants and extinction event
Jul 26, 2022 · The Cretaceous period lasted approximately 79 million years, and ended with a major extinction event about 66 million years ago.