1. The Eras of Geologic Time
... de Buffon, reasoned that the Earth cooled from an originally molten body and that this would have required at least 75,000 years. Buffon had to recant, but development of the principle of uniformitarianism in the late 1700s and early 1800s provided geologists with new grounds for arguing that the Earth is far older than anyone had imagined. Similarly, in 1859, Charles ... separating the Americas from Europe and Africa. Reptiles dominated the Mesozoic era. They derived into large land dwelling dinosaurs of the Jurassic and Cretaceous periods. This period is where flying reptiles and bird...
- Word Count: 1841
- Approx Pages: 7
- Grade Level: Undergraduate