Last seen in:
- Wall Street Journal - Oct 10 2015 - October 10, 2015 - B & B's
- Wall Street Journal - Feb 27 2015 - February 27, 2015 - Positive Reinforcement
- Wall Street Journal - Mar 28 2014 - March 28, 2014 - Sloganeering
- Wall Street Journal - Sep 6 2013 - September 6, 2013 - Academia Nuts
- Wall Street Journal - Apr 23 2010 - April 23, 2010 - Presented in 3-D
- Universal - Jul 19 2009
- Wall Street Journal - Dec 8 2006 - December 8, 2006 - Caveat Emptor
- New York Times - Dec 1 2005
Related Clues:
- Great geological time span
- Geological age
- "___ Flux" (Old MTV cartoon)
- Quasi-opposite of ''flash''
- Tremendous spans
- Proterozoic ___
- Multiple millennia
- Old animated heroine Flux
- Ages upon ages of time
- Geology class periods [subscribe to the best indie xwords today at avxwords.com]
- Long geological period (var.)
- See 19 across
- A lot of the time?
- Eras upon eras
- Geologist's unit