n. a major division of geological time; an era is usually divided into two or more periods [syn: era]
Usage examples of "geological era".
It was obvious to Niall that this had been carved by water in some remote geological era.
Her brother could simply stand and wait through an entire geological era for an answer.
They failed to take into account the paralyzing effect of a geological era (?
Through this past geological era, the inclinations of orbits and spin axes have made Ishtar's northern hemisphere bear the brunt.