Crossword puzzle clue "long geological span"

Here are the possible solutions for long geological span clue

Answer
Clue
Relevancy
eon
Clue
Long long long long long long long time
Long geological span
Geological span
Great geological time span
Definition
a long period of time, also AEON
aeon
Clue
Geological span
Definition
the largest division of geological time, composed of several eras, also EON
epoch
Clue
Geological span
Definition
an important period of time, also EPOCHA
era
Clue
Geological span
Geological time span
Definition
a main division of geological time

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