| Answer | Crossword Clue |
|---|---|
| EON | Phanerozoic ... (current period in the earth's history) |
| EON | Period in the earth's history |
| PERMIAN | Period marked by the largest mass extinction in earth's history |
| NEOCENE | Period in Earth's history |
| Answer | Crossword Clue |
|---|---|
| EON | Phanerozoic ... (current period in the earth's history) |
| EON | Period in the earth's history |
| PERMIAN | Period marked by the largest mass extinction in earth's history |
| NEOCENE | Period in Earth's history |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.