(Gr. oligos: a little; kainos: new) n. An epoch (35.4 to 23.3 million years ago) of the Tertiary Period. It follows the Eocene and precedes the Miocene Epochs. The Oligocene Epoch comprises the Rupelian and Chattian Ages.
Oligocene - An epoch or subdivision of the early Tertiary Period.
The third of the five Geologic Epochs of the Tertiary Period. It extends from the end of the Eocene Epoch (about 37 million years ago) to the beginning of the Miocene Epoch (about 22.5 million years ago).
from 40 million to 25 million years ago; appearance of sabertoothed cats
Third division of Tertiary period spanning an interval from about 40 to 25 million years ago.
third epoch of the Tertiary period, lasting 15 million years; from Greek oligos 'few' + kainos 'recent'.
An epoch of the early Tertiary period, spanning the time between 33.7 and 23.8 million years ago. It is named after the Greek words "oligos" (little, few) and "ceno" (new).
Epoch of the tertiary period, from 38 - 22.5 million years ago.
Ol-i-go-cene (oli-go-sen, oli-) Geology.adj. Of, relating to, or being the geologic time and deposits of the epoch in the Tertiary Period of the Cenozoic Era that extended from the Eocene Epoch to the Miocene Epoch.n. 1. The Oligocene Epoch. 2. The deposits of the Oligocene Epoch.
the name given to the time of earth=s history between 32 and 26 million years ago.
the thrid epoch of the Tertiary period of the Cenozoic era, after the Eocene and before the Miocene, during which the first apes appeared and modern mammals became dominant; the rocks formed in this epoch. [AHDOS
The third part of the Tertiary Period (of the Cenozoic Era); between the Eocene and Miocene
The Oligocene epoch is a geologic period that extends from about 34 million to 23 million years before the present. As with other older geologic periods, the rock beds that define the period are well identified but the exact dates of the start and end of the period are slightly uncertain. The name Oligocene comes from the Greek oligos (few) and ceno (new), and refers to the sparsity of additional modern mammalian faunas after a burst of evolution during the Eocene.