Todays Mars Photo is jumbled terrain in Ius Chasma. The brighter areas are sulfate, a mineral which, on Earth, usually forms in the presence of water as an evaporate. The brighter sulfates are folded over themselves and jumbled. They could have been deposited this way in a landslide, or become disrupted after being deposited by tectonic activity that broke and folded the sulfates.
This image was taken by Mars Reconnaissance Orbiter's HiRISE camera. The image below will link to the original captioned image.