Geological period (3)
'geological period' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for era that I've seen before include "Period of alteration" , "Cycle" , "quite some time" , "8" , "Important historical period" .)
'geological period' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for eon that I've seen before include "Age, epoch" , "In time, long division" , "billion years" , "thousand million years" , "Very long period (US and technical spelling)" .)
'geological period' is the definition.
(I know that Jurassic is a geological period)
This is all the clue.
(Other definitions for jurassic that I've seen before include "Film about dinosaurs" , "Age of dinosaurs" , "remote age" , "'... Park', novel/film about dinosaurs" , "period in past" .)
'geological period' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for epoch that I've seen before include "Geological time period" , "Period, era" , "Historical era" , "Age, time span" , "Major division or period of history" .)
(Other definitions for pleistocene that I've seen before include "denoting an ancient epoch" , "When people first were seen" , "Era when humans emerged" .)