Answer: miocene

AnswerCrossword Clue
MIOCENEA Tertiary epoch
miocenethe Miocene Epoch or Series
miocenenoting or pertaining to an epoch of the Tertiary Period, occurring from 25 to 10 million years ago, when grazing mammals became widespread
mioceneof, relating to, or being an epoch of the Tertiary between the Pliocene and the Oligocene or the corresponding series of rocks see geologic time table
miocenedenoting the fourth epoch of the Tertiary period
MIOCENEEpoch that produced grazing animals
MIOCENEWhen mammals appeared
MIOCENEA geological epoch
MIOCENEGeological epoch when mastodons appeared
MIOCENETertiary epoch
MIOCENEGeological period
MIOCENEDivision of the tertiary system.
MIOCENEGeological period.
MIOCENEPeriod of the Age of Mammals.
MIOCENEGeological epoch
MIOCENEEpoch in which grazing mammals became widespread
MIOCENELong-ago epoch
MIOCENEEpoch with big birds