ahh i found it from ffwiki

The First Umbral Era of Wind. Marked the end of the divine era and the beginning of men's age.
The Second Umbral Era of Lightning.
The Third Umbral Era of Fire.
The Fourth Umbral Era of Earth - Destroyed the Allagan civilization.
The Fifth Umbral Era of Ice.
The Sixth Umbral Era of Water - Severe flooding caused the submersion and damage of many parts of Eorzea.