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
Sheerness only in 1948. Sheerness is located at (51.441, 0.7605), in the north-west corner of the Isle of Sheppey in North Kent. To the north, sandy beaches run along the coast of the Thames Estuary. To the west, the outlet of the River Medway flows into the Estuary. An area of wetlands known as The Lappel lies between the river and the south-western part of town. Marshland lies to the south and the east. The main rock type of the Isle of Sheppey is London Clay, which covers most of North Kent. Along with most of the Kent coast, the uninhabited