Grantham

Sister cities

• Sankt Augustin

Geography

Grantham is a town in the South Kesteven district of Lincolnshire, a non-metropolitan county in the East Midlands of England. Until 1974, it was a municipal borough; it is now a civil parish and bounded by the parishes of Great Gonerby to the north-west, Belton and Manthorpe to the north, Londonthorpe and Harrowby Without to the north-east and east, Little Ponton and Stroxton to the south, Harlaxton to the south-west, and Barrowby to the west. Its urban area is almost entirely within the parish, The town lies in the valley of the River Witham, its core at the Witham's confluence with the Mowbeck (or Mow Beck). The Witham flows south–north through Grantham. The Mowbeck, which rises from springs at Harlaxton about to the south-west of the town, is culverted behind Westgate and Brook Street The floor of the Witham valley – 50–60 m above sea level in the town centre – is underlain by mudstone of the Charmouth formation of the Lower Jurassic period (199–183 million years ago). This formation is overlain by Belton sand and gravel laid down in estuaries and rivers in the Quaternary period up to 3 million years ago. The river courses are overlain by Quaternary alluvium and to the north by river terrace deposits. The soil around the route of the Witham is wet, acidic, sandy and loamy; its fertility is poor. As the ground rises on the town's eastern and southern fringes, it is underlain by Jurassic Marlstone rocks of ferruginous sandstone and ironstone formed 190–174 million years ago, and then by Whitby Mudstone of 174–183 million years ago. The land rises sharply to form the Lincoln Cliff that marks the edge of the urban area and start of the Lincoln Heath and Kesteven Uplands, which are capped by Jurassic Oolitic Limestone, mostly overlain by shallow, free-draining,…