Crossword clue: from 25 million to 13 million years ago; appearance of grazing mammals
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
miocene
7 letters
wn-def
from 25 million to 13 million years ago; appearance of grazing mammals
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from 63 million to 58 million years ago; appearance of birds and earliest mammals
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→ paleocene