The main reason behind this baking hot climate was because of the high levels of carbon dioxide that was present in the air, which was at least 1000 parts per million (ppm) compared to 393 ppm today.

After a temperature spike in the mid-Cretaceous, the climate began to cool, and the tenor changed. New Dinosaurs Though dinosaurs ruled throughout the Cretaceous, the dominant groups shifted and ...

The Cretaceous period happened from 145.5 to 65.5 million years ago. This was when more coastlines appeared. Seasons also became more evident as the planet’s climate became cooler.

The Cretaceous period lasted approximately 79 million years, and ended with a major extinction event about 66 million years ago. Skip to main content. ... Cretaceous period climate.

Scientists have reconstructed the climatic development of the Arctic Ocean during the Cretaceous period, 145 to 66 million years ago. At that time the poles were devoid of ice and average ...

For years, scientists have thought that a continental ice sheet formed during the Late Cretaceous Period more than 90 million years ago when the climate was much warmer than it is today. Now ...

Based on reconstructions of Arctic climate variability in the greenhouse world of the Late Cretaceous, Southampton scientists have concluded that man-made global warming probably would not greatly ...

An ancient lava field covering about one-fourth of India has been tied to the mass extinction some 66 million years ago, but new research suggests its effects on the climate were far weaker than ...