in contrast to the western slopes and ridge-top grass promenade, the coniston face is all crag. a short high level spur juts out from the summit, ending in the shattered cliffs of raven tor. to either side of this promontory is a corrie tarn, low water to the south and levers water to the north. low water is the smaller, its depth increased by a stone faced dam built by the nearby slate quarries. the outflow drops via a fine waterfall to join levers water beck a mile down stream. levers water was also dammed in times past for industrial use (in this case the coniston coppermines), but now provides domestic supply for coniston village. the stone faced dam has increased its depth to some 125 ft. running parallel to the ridge below low water is an unusual lateral valley, named "boulder valley" on ordnance survey maps due to the number of large erratics on its floor.