Unlike nearby continents, Zealandia didn’t stay afloat. During the Paleogene period, its crust thinned and cooled. That shift triggered its gradual sinking. Today, only New Zealand and New ...

Learn about the time period that took place 65 to 23 million years ago. 3 min read At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs, pterosaurs, and giant marine ...

the Palaeogene Period and the Cenozoic Era began. In the Palaeogene, the continents drifted even closer to their present-day positions, and during the following Neogene Period the world was cooler and ...

The continent formed millions of years ago ... a region formed by tectonic activity during the Paleogene period, roughly between 61-33 million years ago. During this time, Earth's crust began ...