Mareotis Fossae is a group of fossae (troughs) in the Arcadia quadrangle of Mars, located at 44° north latitude and 75.3° west longitude. It is about 1,860 km long and was named after an albedo feature at 32N, 96W.
Mareotis Fossae Region, as seen by HiRISE.
Map of Arcadia quadrangle with major features labeled. Several large cracks called Fossae are in this area.