There are fine examples close to Lambley and to the south of Southwell both in Nottinghamshire where the clay bedrock plateau made up of Mercia Mudstone is dissected by a number of streams, forming steep sided, wooded valleys. This gives a pleasing undulating landscape, locally known as 'The Dumbles'.
There are notable illustrations near Lambley and to the south of Southwell in Nottinghamshire where the Mercia Mudstone plateau is dissected by a number of streams, forming steep-sided, wooded valleys. This gives rise to a picturesque undulating landscape, referred to locally as 'The Dumbles'.