HiRISE: Light-toned layers in Tithonium Chasma

Tithonium Chasma is a part of Valles Marineris, the largest canyon in the Solar System. If Valles Marineris was located on Earth, at more than 4,000 kilometers long and 200 kilometers wide, it would span across almost the entire United States. Tithonium Chasma is approximately 800 kilometers long. A “chasma”, as defined by the International Astronomical Union, is an elongate, steep-sided depression.[More at link]