Significados de cretaceous epoch en inglés

During the chalk period, or " cretaceous epoch," not one of the present great physical features of the globe was in existence.

But the relative age of the cretaceous epoch may be determined with as great ease and certainty as the long duration of that epoch.

Upon these followed the chalk deposits of the Cretaceous epoch, until the basin was gradually filled, and partially, at least, turned to dry land.