This image shows graben features (red), strike slip faults (green) and wrinkle ridges (blue) as determined with SMART-1 AMIE in a context Clementine image of the Humorum basin.

Graben features are elongated, trench-like erosional structures which form as the crust is deformed due to the presence of a mascon (mass concentration or 'local overweight').

Strike-slip faults are faults where the rupture is vertical and one side slides past the other. An example is the San Andreas fault along the western United States, however there is no multi-plate tectonic activity on the Moon.

Wrinkle ridges in the Humorum basin are believed to be caused by thermo-mechanical deformation of the mare basalts, rather than mascon tectonics (due to mass concentration, or local 'overweight').