Silted rivers, swamps, beels and oxbow lakes forms the area. Tropical peat forms on low-lying areas, such as river deltas, floodplains or shallow oxbow lakes. Langham Pond was created when the meandering River Thames formed an oxbow lake. Swamps, beels and oxbow lakes characterises the scenery. Pictures from orbit show winding valleys, branched valleys, and even meanders with oxbow lakes. Oxbow lakes are also known as cutoff lakes. Oklahoma's only natural lakes are oxbow and playa lakes. It will collect in large numbers on peninsular floodplains associated with a river oxbow. Horseshoe Lake in Woodland is a former oxbow of the North Fork. During floods, the flood waters deposit fine-grained sediment into the oxbow lake. The river curves in an oxbow around an exclave of Fulton County, Kentucky. One proposed method to restore these oxbow lakes has been dredging. Those that did exist were either oxbow or playa lakes. When deposition finally seals off the cutoff from the river channel, an oxbow lake forms. It is near Bookbhora Oxbow Lake.