Related Clues:
- A seeming eternity
- Some collars and jackets
- The time it takes mountains to rise
- Billion-year increments, in geology
- Ages and ages (Var.)
- Long, long times
- Hundreds of centuries
- Mammoth time units
- Nigh-infinite periods
- Extremely long time periods
- Many lifetimes
- Geologic stretches
- Geologic time spans
- Interminable times
- Gobs of time