A graben is a downdropped block of material bounded on both sides by faults. The graben in this image from NASA 2001 Mars Odyssey spacecraft follows the trend of the nearby Sirenum Fossae graben.
A graben is a downdropped block of material bounded on both sides by faults. The graben in this image from NASA 2001 Mars Odyssey spacecraft follows the trend of the nearby Sirenum Fossae graben.