Geological periods (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">geological periods</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for eons that I've seen before include "Divisions of archaeological time" , "Years and years" , "Nose (anag)" , "Divisions of geological time" , "Very long periods (US)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">geological periods</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for eras that I've seen before include "typeface" , "At least two times" , "Epochs" , "Periods of time" , "Periods, ages" .)