These are three views of Mare Serenitatis, taken by the mapping camera of the Apollo 17 mission in 1972, facing north-northeast from an average altitude of 107 km. At the right is the east margin of Mare Serenitatis, with the 95 km diameter crater Posidonius at the central horizon, the basalt-flooded Le Monnier crater to the south, the mare ridge (or wrinkle ridge) Dorsa Aldrovandi at center, Littrow crater at the right, and the landing site of Apollo 17 in the lower right corner in the
Some of the strongest tonal, color, and structural contrasts among mare materials occur in Mare Serenitatis. This color Apollo 17 image shows that the dark materials were emplaced before the lighter materials near the top.