Ammon – The Cretaceous and Jurassic periods are two periods of geological time and Earth’s history. But they differ in several aspects, including the time in which they lasted and the events and circumstances during which they occurred. Here is a comparison between the Cretaceous and Jurassic periods:
Cretaceous period:
1. Time: The Cretaceous period lasted from about 145 million years ago until about 66 million years ago.
2. Chronological divisions: The Cretaceous period is divided into three sub-periods: the Sunonian, the Albian, and the Turonian.
3. Wildlife: In the Cretaceous period, dinosaurs flourished and became diverse and gigantic, including famous dinosaurs such as Tyrannosaurus and Triceratops. This period was one of the peak periods of dinosaur rule.
4. Environment: The Cretaceous period witnessed the formation of many mountain ranges, lakes, and volcanic environments.
Jurassic period:
1. Time: The Jurassic Period lasted from about 201 million years ago until about 145 million years ago.
2. Chronological divisions: The Jurassic period is divided into three sub-periods: the Hylian, the Twaron, and the Cimmerocian.
3. Wildlife: In this era, dinosaurs flourished and the variety and diversity of dinosaurs became large, with famous species such as Brachisaurus and Dilophosaurus.
4. Environment: The Jurassic saw the expansion of the seas and the lowering of sea levels in some areas, leading to the formation of new landmasses and environmental diversity.
In short, the Jurassic and Cretaceous are two distinct periods in Earth’s history in which dinosaurs and other environmental organisms flourished, but they differ in the time, environment, and events they witnessed.
