In the Weald Basin, the Wealden Group consists of four formations: the Ashdown Formation, the Wadhurst Clay Formation, the Tunbridge Wells Sand Formation and the Weald Clay Formation. The lower three formations are sometimes collectively referred to as the Hastings Beds.
The Wealden Group in the Weald Basin is composed of four formations: the Ashdown Formation, the Wadhurst Clay Formation, the Tunbridge Wells Sand Formation, and the Weald Clay Formation. The lower three formations are sometimes referred to collectively as the Hastings Beds.