What is Cretaceous:
As Cretaceous or Cretaceous it is called the third and last geological period of the Mesozoic Era, whose end is marked by the mass extinction of the dinosaurs.
It spanned from 144 million years ago to approximately 65 million years ago. Its approximate duration was 79 million years. In this sense, it is the longest of geological periods.
It is after the Jurassic and before the Paleocene, the latter belonging to the Cenozoic era, in which we currently live. As such, the Cretaceous period is subdivided into Lower Cretaceous and Upper Cretaceous.
See also Jurassic.
Geologically, during this period / Pangea / Pangea ended up dividing to form the current continents, although their positions were not the same as they are today. Gondwana fragmented, forming the continental masses of Africa, Australia, Antarctica, South America, India, and Madagascar. The same happened with Laurasia, from which North America and Eurasia fell off.
All these movements in the tectonic plates gave rise to the great mountain ranges of today, such as the Andes or the Himalayas, as well as the formation of the Atlantic Ocean from the separation of the continents.
In the plant kingdom, the first flowering plants appeared, while in the animal kingdom, dinosaurs continued to dominate the terrestrial landscape.
The climate, on the other hand, was warm, without traces of glaciation at the poles, from which it follows that the sea level has been higher compared to today.
The end of this period is marked by the fall of a meteorite on Earth, which produced a mass extinction event in which the dinosaurs would disappear, giving way to the successful development of mammals in the following period.