Clue: Billion-year span
We have 1 possible answer for the clue Billion-year span which appears 4 times in our database.
Possible Answers:
Related Clues:
- Section of geological history
- Incredibly long geological span
- Geological span of many, many years
- A real long time
- Period in the geologic time scale
- Geologist’s time period
- Long period in Spain, working
- Hyperbolic wait time
- Length of time spent on hold, it often seems
- Long time to wait, facetiously
- Time period of 1 billion years
- Interminable span
- It's quite a long time
- Period divided into eras
- Mega years