Time spans in geochronology in a fun online archaeology learning game.

"Geochronological Units Puzzle " is a free online knowledge level game, about equivalents in years for units of geochronology and stratigraphy. How much is one eon, era, period, epoch and age in archaeology. A small puzzle game for desktop computers, laptops and tablets, which may be played in the web browser. The Archaeology Knowledge Board include information and pictures of major 5 periods, to play with. Part of the Interactive Treasure Hunting educational tools.