Related Clues:

• Pieces of the past
• Prolonged period
• L-o-n-g stretch of time
• Looooong time
• Extremely long time period
• Big stretch
• Time without end
• Wait at the motor vehicle bureau, say
• It's a big stretch
• Long geological time
• Longest time
• Huge time stretch
• L-o-n-g time
• Dark __
• Geology period