Wadhurst Clay Formation
![The Top Ashdown Pebble Bed, which marks the base of the Wadhurst Clay in East Sussex](/Images/godic/202502/20/Top_Ashdown_Pebble_Bed1719.jpg")
![Translational landslip at the boundary of the Wadhurst Clay and Tunbridge Wells Sand near Etchingham](/Images/godic/202502/20/Translational_landslip_between_Wadhurst_Clay_and_Tunbridge_Wells_Sand1719.jpg")
The Wadhurst Clay Formation is a geological unit which forms part of the Wealden Group and the middle part of the now unofficial Hastings Beds. These geological units make up the core of the geology of the High Weald in the English counties of West Sussex, East Sussex and Kent.