Eozoic

The Laurentian rocks were at first spoken of as representing "Azoic" time; but in 1846 Dawson found a formation deep in their midst which was believed to b e the fossil relic of a very low form of life, and after that it became customary to speak of the system as "Eozoic."

A History of Science: in Five Volumes. Volume III: Modern development of the physical sciences 1904

Eozoic, to the very dawn of life, we find a series of organic forms becoming simpler and simpler, until we again reach the simplest term in the lowest conceivable forms of life.

Documenting the American South: The Southern Experience in 19-th Century America 1903

What no merits of his could give, the land which he had chosen gave, Mesopotamia pretty soon proving herself a treasury of mineral riches: here is bdellium and the onyx - stone; and where the streaming Pison, dawdling, draws his twine of waters over that happy valley of Havilah, there is gold -- hoard stored from before the Eozoic, as misers bury for their heirs, in mine and friable quarry, rollick rain: "and the gold of _that_ land is good".

The Lord of the Sea 1906