65000000 B.C. to 3000000 B.C.

Lavos Timeline

-An Ice Age sets in due to the impact of Lavos. 
-Reptites die from the Ice Age; humans retreat underground, while some use
and cultivate elemental magic to create Zeal.
-Plots of ground are raised to form Zeal; the Sun Palace is built to house the 
Sun Stone. Elemental weapons are sealed in a blue pyramid.
-Humans that are not innate magic users as evolved by Lavos are able to use
magic through the Sun Stone and/or other elemental powers.

Keystone T-1

-An Ice Age sets in due to the impact of Lavos. 
-Reptites die from the Ice Age; humans retreat underground, while some use
and cultivate elemental magic to create Zeal.
-Plots of ground are raised to form Zeal; the Sun Palace is built to house the 
Sun Stone. Elemental weapons are sealed in a blue pyramid.
-Humans that are not innate magic users as evolved by Lavos are able to use
magic through the Sun Stone and/or other elemental powers.

Keystone T-2

-An Ice Age sets in due to the impact of Lavos. 
-Reptites die from the Ice Age; humans retreat underground, while some use
and cultivate elemental magic to create Zeal.
-Plots of ground are raised to form Zeal; the Sun Palace is built to house the 
Sun Stone. Elemental weapons are sealed in a blue pyramid.
-Humans that are not innate magic users as evolved by Lavos are able to use
magic through the Sun Stone and/or other elemental powers.

From: Chronology