Crossword puzzle clue "epoch that saw the advent of mammals"

Here are the possible solutions for epoch that saw the advent of mammals clue

Answer
Clue
Relevancy
eocene
Clue
Epoch that saw the advent of mammals
Epoch that saw the dawn of modern mammals
Dawn-of-mammals epoch
Epoch when mammals arose
Epoch in which mammals became dominant
Epoch in which modern mammals first emerged
Epoch in which mammals arose
Definition
of rock formed in the second epoch of the Tertiary geological period
aeon
Clue
Epoch upon epoch
Definition
the largest division of geological time, composed of several eras, also EON

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