The
Millstone Grit forms the edge of the high peat
moorland plateau on the eastern side of the valley above
Ladybower Reservoir, the edges being the last remains of the gritstone which originally covered all of the Peak District, most of which was scraped off by glaciers in the last
ice age. The Edge itself is notable for its unusual gritstone
tors and its views of the Derwent Valley and the
Dark Peak landscape; these features along with its proximity to
Sheffield have made it a popular venue for walkers. Its popularity has led to substantial path erosion and the most affected parts of the edge between The Salt Cellar and Lost Lad Hillend have been paved with natural stone slabs to reduce further damage as part of the Lottery Paths Project. == Tors ==