1. eocene - Noun
2. eocene - Adjective
3. Eocene - Proper noun
Pertaining to the first in time of the three subdivisions into which the Tertiary formation is divided by geologists, and alluding to the approximation in its life to that of the present era; as, Eocene deposits.
The Eocene formation.
Source: Webster's dictionaryAn unnamed fossil from Argentina proves that, by the Bartonian (Middle Eocene ), some 39–38 mya, Contra Baker et al. Source: Internet
And, as we now know, that is what did happen over large areas of North America from the Eocene to the Pleistocene : the ultimate causative agent was global temperature reduction (see Paleocene–Eocene Thermal Maximum ). Source: Internet
A sharp increase in atmospheric carbon dioxide was observed with a maximum of 4000 ppm: the highest amount of atmospheric carbon dioxide detected during the Eocene. Source: Internet
Although marsupials and placental mammals did coexist in Australia in the Eocene, only marsupials have survived to the present. Source: Internet
At about the beginning of the Eocene Epoch (55.8-33.9 million years ago) the amount of oxygen in the earth's atmosphere more or less doubled. Source: Internet
At the beginning of the Eocene, several new mammal groups arrived in North America. Source: Internet