The Ozarks are old and worn mountains from the geological past.

Actually, the amount of carbon dioxide in the air and, the world average temperature are lower than they have been in the geological past.

The distant geological past is immediately present in Johns Valley.

In the geological past of the Earth, however, geological research has shown that much larger events have occurred.

In the geological past, a much larger number of species of Strombus existed.

This family is a very ancient lineage; there were numerous species in the geological past.

In the geological past, many more species existed than are now extant.

It suggests a monument to pasts both geological and architectural.

Studies of the underwater debris fields tell much about the islands' geological past and future.

At certain times in the geological past, corals were very abundant.