This shaded relief painting is based on Viking Orbiter images and shows the Valles Marineris trough system with a map of the United States for scale. Valles Marineris is 4000 kilometers long, nearly enough to stretch from New York to California. Valles Marineris reaches a maximum depth of 10 kilometers. The red box outlines the region shown in slide #6.
From Meszaros, 1985, Plate 46