Between the areas of chalk and limestone downland are clay valleys and vales. The largest of these vales is the Avon Vale. The Avon cuts diagonally through the north of the county, flowing through Bradford-on-Avon and into Bath and Bristol. The Vale of Pewsey has been cut through the chalk into Greensand and Oxford Clay in the centre of the county. In the south west of the county is the Vale of Wardour. The southeast of the county lies on the sandy soils of the northernmost area of the New Forest.