Gigas Sulci
file:Gigas Sulci based on THEMIS Day IR.png|thumb|Gigas Sulci as seen from THEMIS day-time infrared
Gigas Sulci is an area of subparallel furrows and ridges in the Tharsis quadrangle of Mars, located at. It is 398 km across and was named after a classical albedo feature name. The term "sulci" is applied to subparallel furrows and ridges.