Related Clues:

• Moment in time, in astronomy
• A unit of geological time
• Cold snap to the max?
• The Eocene, for one
• Pleistocene epoch nickname
• Glacial era
• Pleistocene Epoch event
• Geologic time period
• Pliocene, for one
• Frigid era
• Time of global cooling
• Time of advancing glaciers
• Unit of geologic time
• Part of a period, geologically
• Film with the acorn-chasing Scrat