altai scarp

This massive fault is another effect of the impact which created the Mare Nectaris - part of a circular ripple thrown out by the titanic shock. This "remnant" is still 300 miles long and up to 2 miles tall.

Photo: Patrice Poyet. The full size original of this can be seen in his large annotated collection of images, Poyet's Celestial HyperBook.

Inconstant Moon