Syrtis Major Planum

Description

Syrtis Major Planum is a massive shield volcano in the eastern hemisphere of Mars. A "dark spot", Syrtis Major Planum is located in the boundary between the northern lowlands and southern highlands of Mars just west of the impact basin Isidis in the Syrtis Major quadrangle. It was formerly believed to be a plain, and was therefore described as a planitia. Later data from the Mars Global Surveyor revealed that it is actually a broad topographic rise. The dark color of Syrtis Major Planum comes from the basaltic volcanic rock of the region and the relative lack of dust.