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
Kingdom of Kent county of Kent. Knowledge of Anglo-Saxon Kent comes from scholarly study of Late Anglo-Saxon texts such as the "Anglo-Saxon Chronicle" and the "Ecclesiastical History of the English People", as well as archaeological evidence such as that left by early medieval cemeteries and settlements, and toponymical (place-name) evidence. In the Romano-British period, the area of modern Kent that lay east of the River Medway was a "civitas" known as "Cantiaca". Its name had been taken from an older Common Brittonic place-name, "Cantium" ("corner of land" or "land on the edge") used in the preceding pre-Roman Iron Age, although the extent of