The clue "One billion years, in geology" last appeared in the Universal crossword on February 19, 2016. The correct answer for this puzzle is "EON", a 3-letter word.
Solution EON is 3 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is EON with 3 letters, and the shortest is EON with 3 letters.
No, "ONE BILLION YEARS, IN GEOLOGY" hasn´t seen a spike right now. Solvers are most interested in: Express sorrow, Dormant, Lose one's cool, church officer and NYC gallery.
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The solution is 3 letters long.