Tunbridge Wells Sand Formation
![A climber scales the Ardingly Sandstone at Bowles Rocks near Crowborough](/Images/godic/202502/18/Bowles_Rocks3409.jpg")
![Translational landslip at the boundary of the Wadhurst Clay and Tunbridge Wells Sand near Etchingham](/Images/godic/202502/18/Translational_landslip_between_Wadhurst_Clay_and_Tunbridge_Wells_Sand3409.jpg")
The Tunbridge Wells Sand Formation is a geological unit which forms part of the Wealden Group and the uppermost and youngest part of the unofficial Hastings Beds. These geological units make up the core of the geology of the Weald in the English counties of West Sussex, East Sussex and Kent.