EOCENE

• 15-million-year epoch

• A Tertiary Period epoch

• Cenozoic epoch

• Certain epoch

• Certain geologic epoch

• Dawn horse epoch

• Dawn-of-mammals epoch

• Early era

• Epoch 50 million years ago

• Epoch between Paleocene and Oligocene

• Epoch characterized by the rise of mammals

• Epoch in the Cenozoic Era

• Epoch in the Tertiary period

• Epoch in which mamals arose

• Epoch in which mammals became dominant

• Epoch in which modern mammals emerged

• Epoch in which modern mammals first emerged

• Epoch of 50 million years ago

• Epoch of mammals' appearance

• Epoch of modern birds and mammals

• Epoch that saw the advent of mammals

• Epoch that saw the rise of mammals

• Epoch when bats first appeared

• Epoch when horses appeared

• Epoch when mammals appeared

• Epoch when mammals arose

• Epoch when mammals began

• Epoch when mammals emerged

• Epoch when mammals evolved

• Epoch when modern mammals appeared

• Epoch when monkeys first appeared

• Extremely warm epoch in which mammals became dominant

• Geologic epoch

• Mammalian epoch

• Modem mammal era

• Occurring 40 to 55 million years ago

• One of the epochs

• Tertiary division

• Tertiary epoch

• Tertiary Period part

• Tertiary Period segment

• Time of the first modern mammals

• From 40 million to 58 million years ago

• Presence of modern mammals