Crossword clue: from 280 million to 230 million years ago; reptiles
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
permian
7 letters
wn-def
from 280 million to 230 million years ago; reptiles
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from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity
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→ triassic