Answer: eocene

AnswerCrossword Clue
EOCENEA Tertiary Period epoch
EOCENEEpoch when bats first appeared
EOCENEEpoch 50 million years ago
EOCENEEpoch of the Tertiary period
EOCENEEpoch of 50 million years ago
EOCENEEpoch when mammals arose
EOCENEOccurring 40 to 55 million years ago
EOCENETertiary Period part
EOCENEEpoch in which mamals arose
EOCENEEpoch when horses first appeared
EOCENEEpoch of the Tertiary Period
EOCENEEpoch in the Tertiary Period
EOCENEEpoch of the mammal
EOCENEEpoch.
EOCENEEarly epoch.
EOCENEGeologic age.
EOCENEPeriod in geology.
EOCENEOf an early epoch.
EOCENEEpoch when mammals began
EOCENEEpoch between Paleocene and Oligocene
EOCENEEpoch characterized by the rise of mammals
EOCENEEpoch of modern birds and mammals
EOCENECertain geologic epoch
EOCENECertain geological epoch
EOCENEDawn horse epoch
EOCENECertain epoch
EOCENEOne of the epochs
EOCENEEpoch that saw the advent of mammals
EOCENEEpoch when modern mammals arose
EOCENEPeriod of great climate change
eocenenoting or pertaining to an epoch of the Tertiary Period, occurring from 55 to 40 million years ago and characterized by the advent of the modern mammalian orders
eoceneof rock formed in the second epoch of the Tertiary geological period
eocenethe Eocene Epoch or Series
EOCENEDawn-of-mammals epoch
EOCENEEpoch when mammals evolved
EOCENEEpoch that saw the dawn of modern mammals
EOCENEEpoch when mammals emerged
EOCENEEpoch in which modern mammals emerged
EOCENEEpoch in which mammals became dominant
EOCENEEpoch when monkeys first appeared