Crossword puzzle clue "long geologic time period"

Here are the possible solutions for long geologic time period clue

Answer
Clue
Relevancy
eon
Clue
Long long long long long long long time
Extremely long geologic time period
Long, long, long time period
Geologic time period
Huge geologic time period
Definition
a long period of time, also AEON
epoch
Clue
Long geologic time period
Geologic time period
Period on a geologic time scale
Definition
an important period of time, also EPOCHA

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