Related Clues:

• Geologic period
• Bit of history
• Victorian or Big Band
• Major division of time
• Unbelievably long time
• The Sixties, e.g.
• It goes on and on
• Span of time
• Noteworthy time
• History chapter
• Geologic time
• Significant period
• Longish time span
• Period piece
• History division