Crossword puzzle clue "major time span"

Here are the possible solutions for major time span clue

Answer
Clue
Relevancy
eon
Clue
Major time span
Definition
a long period of time, also AEON
week
Clue
Time's time span
age
Clue
Major span
Definition
to grow old
era
Clue
Major span
Definition
a main division of geological time
aeon
Clue
Geologic time span
Vast time span
Time span in a geology book
Really long time span
Definition
the largest division of geological time, composed of several eras, also EON

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