Crossword Genius

Geological era (8)

Ross

I believe the answer is:

mesozoic

'geological era' is the definition.
(I know that Mesozoic is a geological era)

This is all the clue.

(Another definition for mesozoic that I've seen is " Ice zooms during this geological period".)

I've seen this clue in The Sun, the King Feature Syndicate and the Canadiana.
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