A number of lesser ridges radiate out eastwards from High Raise, centred upon the subsidiary top of Sergeant Man.

Westward it broadens considerably, swinging southward around the head of Codale Tarn before becoming indistinct in the general rising ground towards Sergeant Man and the High Raise massif.

Codale Tarn is a shallow pool, its original outlet blocked by a moraine so that it now overflows via a rock lip.

The summit area is composed of the dacitic welded lapilli tuff and volcaniclastic sandstone of the Lincomb Tarns Formation.

The southern crags reveal andesite sills and the pebbly sandstone and breccia of the Pavey Ark Member.