Bare rock on the mountain slopes is no longer smooth 4 m facets. Within about 120 m it is redrawn finely and split by long joints, with cross joints ending in T junctions, so slabs break into irregular plates; since October 28 the joints in new worlds bend in shared arcs and the blocks between them are 3 to 6 m across. The cracks wander, swell and taper, and since October 27 they shade softly into the rock, one edge lit and the other in shallow shade, while the wide ones are clean slots with straight walls. You can collide with the plates, and plants sit in the cracks.

Thin joints stay visible out to about 60 m, and farther off they fade so walls show their big joints and shadows. New worlds only.