era ***
geological era

But as to the specific relationships between the geological eras, systems and series, there can be no logical protest.

But in its current geological era, the red planet is too cold and has too little atmosphere to allow liquid to survive for long.

Its diet has had to change quite a bit over the geological eras.

The area in between is counted among the geological era of Holocene.

It was obvious to Niall that this had been carved by water in some remote geological era.

If it is, it may be the shortest of all geological eras.

The north is counted among the geological era of Holocene.

We in Wisconsin thought more in terms of geological eras.

The rock types in Nordaustlandet stem from many different geological eras.

His particular interest was the Quaternary period, the most recent geological era, roughly the last 1.8 million years.