65000000 B.C. to 3000000 B.C.
From Chrono Compendium
Lavos Timeline
-An Ice Age sets in due to the impact of Lavos. -Reptites die from the Ice Age; humans retreat underground.
Keystone T-1
-An Ice Age sets in due to the impact of Lavos. -Reptites die from the Ice Age; humans retreat underground.
Keystone T-2
-An Ice Age sets in due to the impact of Lavos. -Reptites die from the Ice Age; humans retreat underground.
From: Chronology