Ophir Chasma Dunes

THEMIS has taken some great pictures of Valles Marineris, the largest canyon in the solar system. If this canyon were on Earth, it would stretch from New York to Los Angeles. Image of the Day toured some of the canyons that make up this vast system.
In this image of Ophir Chasma, layered rock formations and wind etched rocks are present. The southern part of the image contains a dune field.