Crossword puzzle clue "major division of geological time"

Here are the possible solutions for major division of geological time clue

Answer
Clue
Relevancy
era
Clue
Major division of geological time
Definition
a main division of geological time
ncaa
Clue
Group that labels schools as Division I, Division II, or Division III: Abbr.
aeon
Clue
Longest division of geological time
Geological time division
Longest division of geological time (var.)
Geological time division (Var.)
Definition
the largest division of geological time, composed of several eras, also EON
eon
Clue
Longest division of geological time
Geological time division
Definition
a long period of time, also AEON

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