The image on the left shows Conamara Chaos, a region of Europa's surface where some process has disrupted the preexisting terrain of crosscutting ridges. In this false-color image, reddish-brown areas represent impure ice. White areas are rays of material ejected during the formation of the 25-km diameter impact crater Pwyll (see global view). Ice is blue, and coarser-grained ice is darker blue while finer-grained ice is light blue. These images were obtained by Galileo during September 7, 1996, December 1996, and February 1997.