Related Clues:
- Periods of two or more of 40-Across
- Really, really long time
- Immensely long stretches
- A divine power
- A lot more than a minute
- Billion-year time divisions
- Gorges are carved over them
- A devine power
- Immeasurable stretch
- Many, many, many, many, many moons
- Practically an eternity
- Loooooooong time
- Hadean, for example
- Long, long stretch
- Immensely long span