Fenny Bentley, Derbyshire

Landslide case study

The landslide at Fenny Bentley is located approximately 3 km north of Ashbourne in Derbyshire. As a result of this landslide, the B5056 road became dangerous and has been closed. Movement on this section of road had been reported in local and national news for some time.

The BGS Landslide Response Team made a visit to the landslide on 13 August 2009 to investigate the failure. Information was collected for the BGS National Landslide Database and geological maps.


The geology underlying this slope is part of the Bowland Shale Formation, previously known as the Edale Shale. This is Carboniferous in age (Namurian) and belongs to the Craven Group. The Chesterfield Landslide Report and Derby Landslide Report highlight other areas where landslides occur in the Bowland Shale Formation.

The Bowland Shale Formation is composed of mainly dark grey, fissile mudstones, weakly calcareous, interbedded limestones, and sandstones. It is fossiliferous in discrete bands and is commonly associated with landslides throughout Derbyshire.

Alluvial deposits present in a flattened area at the bottom of the slope are associated with the Bradbourne Brook.


Fresh landslide features known as mud flows were mostly seen in the upper part of the slope, below the road. The landslide reported is actually a reactivation of part of an older and larger landslide.

The 1:10 000-scale geological map shows the extent of the older and larger landslide. This landslide has not been printed on our 1:50 000-scale geological map, as it was too small to represent cartographically at that scale.

All the information about the landslide was collected by the Landslide Response Team using BGS·SIGMAmobile technology.

Contact the Landslide Response Team

Tel: 0115 936 3143 Email: landslides@bgs.ac.uk

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