What is the composition of lithosphere of mars?

The lithosphere of Mars is primarily composed of basaltic rock, which is a result of volcanic activity. It contains a mixture of silicate minerals, including pyroxenes and olivines, and is rich in iron and magnesium. The Martian lithosphere also features sedimentary layers formed by wind and water processes, as well as polar ice caps made of water and carbon dioxide ice. Overall, its composition reflects a history of volcanic activity, tectonics, and erosion.