So September is officially mass wasting month. Since it was my suggestion, I suppose I had better make a contribution.

Here is probably England's most famous landslide at Mam Tor in Derbyshire. Actually initiated about 4,000 years ago, the landslide way traversed by a salt trading route across the Peak District which later became the A625 trunk road. It was continuously plagued by movement, particularly after heavy rains. The road, finally abandoned in 1979, shows several generations of tarmac and gravel several metres thick. The landslide, displaying the classic crescentic back scar and debris flow toe, is monitored by the University of Manchester and moves on average about 25cm per year, more after heavy rain.

Mam Tor - or the Shivering Mountain, is comprised of Namurian turbiditic sandstones and mudstones. The summit shows the earthworks from a late Bronze Age to early Iron Age hill fort, probably occupied from about 1200 BC.

More details from the British Geological Survey.

The flashearth link is here but the Google Earth imagery is better.