Enter a clue or pattern or both:
The Clue
Deposits from a geological epoch (7 letter answer)
The Answer
EOCENES
Tags
Notes
The answer EOCENES is so rare that it appears less than once every 2500 puzzles.
Definition
EOCENE as a noun:
1. (Eocene, Eocene epoch) = from 58 million to 40 million years ago; presence of modern mammals