The most common and most likely answer to this crossword clue is the 8 letter word STONEAGE which also is the latest solution we found used in New York Times in 1955.
Circa 12 million years ago crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| STONEAGE | 100 % | 8 | 
Words with a meaning similar to the clue: Circa 12 million years ago
These words may or may not be a possible solution to this crosswords clue.- miocene
 - oligocene
 - pleistocene
 - carboniferous
 - mesozoic
 - triassic
 - ordovician
 - mississippian
 - phanerozoic
 - jurassic
 - cambrian
 - paleozoic
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution