Valles Marineris is an enormous canyon on Mars, over 4,000 kilometres in length, up to 600 km wide and 10 km deep. It was named after the Mariner spacecraft which first imaged it, and is believed to be a giant tectonic fault.
Valles Marineris is an enormous canyon on Mars, over 4,000 kilometres in length, up to 600 km wide and 10 km deep. It was named after the Mariner spacecraft which first imaged it, and is believed to be a giant tectonic fault.