Related Clues:
- Cold spell (a very long one!)
- Frozen era
- Very long cold spell
- Freezing era
- 2002 animated movie
- Big freeze
- When mammoths roamed
- Great Lakes creator
- Skate over silver ecstasy for the big chill
- Mammoth occasion?
- Frigid stretch
- Film featuring a mammoth named Manny
- Animated film with Scrat
- One from church is seventy years old when hell freezes over we presume
- Frigid historic period