Mareotis Fossae
Encyclopedia
Mareotis Fossae is a group of troughs in the Arcadia quadrangle
Arcadia quadrangle
The Arcadia quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey Astrogeology Research Program. The quadrangle is located in the north-central portion of Mars’ western hemisphere and covers 240° to 300° east longitude and 30° to 65° north latitude...

 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. Troughs, like this one are called Fossae on Mars. More information and more examples can be found at Fossa (geology)
Fossa (geology)
Fossa is a term used in planetary geology to describe a long, narrow depression on the surface of an extraterrestrial body, such as a planet or moon...

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