Geology of Kent into northern France. The fold arises from the continuing Alpine orogeny and results in the general northward dip of the rock strata in most of Kent. There are extensive spreads of coastal and estuarine alluvium on the Thames Estuary coast, in the low ground surrounding the Isle of Thanet and across Romney Marsh. Alluvium also floors the valleys of the River Medway and Stour. 'Clay-with-flints' is a commonly occurring deposit across the North Downs which is a product of periglacial conditions during the last ice age. Loessic deposists, of aeolian origin i.e. windblown, are common in east Kent, especially on
Vale of Kent landscape of "Low Weald", of which the Vale of Kent is a part. The Weald-Artois Anticline continues some further south-eastwards under the Straits of Dover, and includes the Boulonnais of France. Vale of Kent The Vale of Kent, located in Kent, England, is the name given to the broad clay vale between the Greensand Ridge and the High Weald. The area is drained by a number of rivers, including the Beult, Eden Medway, Stour and River Teise. Principal settlements in the Vale include Ashford and Tonbridge. The Weald is the eroded remains of a geological structure, an anticline, a dome