The tors are formed from heavily faulted Ordovician age, grey-white quartzose sandstones known as the Stiperstones Quartzite Formation. This Arenigian age rock unit which dips steeply to the WNW is between 120 and 325m thick. The western slopes of the hill dropping to Stiperstones village are formed in the overlying Mytton Flags Formation, whereas the eastern slopes are formed in the underlying, and hence older, mudstones of the Shineton Shale Formation. Faulting narrows the outcrop of the Mytton Flags along the southern part of the Stiperstones ridge and the mudstones of the Hope Shale Formation with their interbedded volcaniclastics form much of the afforested ground to the west. The outcrop of the Stipertones Quartzite continues south-southwest to Black Rhadley Hill and peters out just beyond Heath Mynd. To the north-northeast, it continues as far as Pontesbury.