Holbeck Hall landslide, 1993

• The cliff consists of glacial till (sands, silt and clay) resting on a low cliff of sandstone. 

  Why did it happen?

  The likely cause of the landslide was a combination of: 

  • Heavy rainfall of 140 mm (in the two months before the slide took place)
  • Drainage of the slope (pore water pressure built up in the slope and the geology)