Definition of "geological time" []

• The time of the physical formation and development of the earth (especially prior to human history) (noun)

WordNet. Princeton University. 2010.

• "Well, presumably, whatever factors applied to the flatworms throughout geological time to this day, those same factors applied to the rest of the animal kingdom before the Cambrian."
• "Evolution and the vast span of geological time are recurrent themes in Wolseley’s work."