Crossword puzzle clue "one billion years geologically"

Here are the possible solutions for one billion years geologically clue

Answer
Clue
Relevancy
eon
Clue
One billion years, geologically
365 billion days, geologically
Years and years and years
Definition
a long period of time, also AEON
eons
Clue
One billion years, geologically
A billion years, geologically
Billions of years, geologically
Definition
EON, a long period of time, also AEON
kauai
Clue
Hawaiian isle that's geologically the oldest one
ages
Clue
Years and years and years
Definition
AGE, to grow old

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