A practice of treating the Greensand Ridge regularly as part of the Weald arose in geology when natural scientists, starting in the late 18th century, began to include it in their analysis of the geological history of the Wealden dome. Geology still confuses by using interchangeably the Weald and the Wealden Anticline that embraces all the land bounded by the chalk escarpments of the North and South Downs, including the Greensand hills.