The dinosaurs went extinct 66 million years ago — and two billion years is thirty times as long as that.

The Cambrian explosion, the event in which complex animal life diversified dramatically in the fossil record, happened approximately 540 million years ago — and two billion years is nearly four times as long as that.

The common ancestor of modern humans and chimpanzees lived approximately 6 to 7 million years ago — two billion years is roughly three hundred times that duration.

When the sediments that would become the Roraima Supergroup were being deposited, the continents were in completely different positions than they occupy today.