The Cenozoic era comprises two divisions,-theTERTIARY period and the QUATERNARY period.

The Cenozoic era had volcanic activity and geological unrest.

In geologic time, the beds are a part of the Oligocene epoch of the Cenozoic era.

The Mesozoic era has three periods, the Triassic, Jurassic and Cretaceous, while the Cenozoic era names five periods,-theEocene, Oligocene, Miocene, Pliocene and Pleistocene.