Geological time span

This time we are looking on the crossword clue for: Geological time span.
it’s A 20 letters crossword puzzle definition. See the possibilities below.

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Possible Answers: ERA.

Last seen on: –USA Today Crossword – May 22 2023
LA Times Crossword 31 Jan 22, Monday
LA Times Crossword 20 Sep 19, Friday
The Washington Post Crossword – May 17 2019
Canadiana Crossword – Nov 19 2018