The Eocene epoch lasted from about 56 to 33.9 million years ago.
the Eocene period
Frequency:
70
%
During the Eocene period, mammals underwent a major diversification.
the Eocene climate
Frequency:
65
%
The Eocene climate was much warmer than it is today.
the Eocene era
Frequency:
60
%
The Eocene era saw the rise of modern mammal groups.
Idiomatic Expressions for the Eocene
Phrase: As rare as an Eocene mammal
Meaning: Describes something extremely uncommon or scarce.
Usage: Finding a complete skeleton of an Eocene mammal is as rare as an Eocene mammal itself.