Crossword puzzle clue "major time periods"

Here are the possible solutions for major time periods clue

Answer
Clue
Relevancy
eons
Clue
Major time periods
Definition
EON, a long period of time, also AEON
eras
Clue
Major time periods
Major periods
Definition
ERA, a main division of geological time
eon
Clue
Periods upon periods
Definition
a long period of time, also AEON
aeons
Clue
Time periods
Long periods of time
Long time periods
Immense time periods
Definition
AEON, the largest division of geological time, composed of several eras, also EON

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