North America was separated from Europe by the Tethys Ocean, and South America was just beginning its slow northward journey toward Central America. The Cretaceous World: A Greenhouse Planet Geologically, 100 million years ago places us squarely in the middle of the Cretaceous Period, an era that began roughly 145 million years ago and ended 66 million years ago.
Fossil Clues Reveal 100 Mya: Decoding Earth's Ancient Landscapes
The supercontinent Pangaea had long since broken apart, but the major landmasses were still in a state of dramatic rearrangement. This period, known as the Cretaceous, was not a mere prelude to the age of humans but a dynamic and flourishing chapter in Earth’s 4.
In the north, the Atlantic Ocean was a narrow seaway, but it was widening rapidly. The Shifting Continents: A Map in Flux The physical arrangement of the world’s continents was dramatically different.
Fossil Clues Reveal How Continents and Climates Shaped the Cretaceous World
This botanical revolution provided new niches and food sources, fueling further evolutionary innovation. Continental Drift and Its Consequences The movement of these continents reshaped ocean currents and global climate patterns, creating unique environments.
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