 The regional tectonics therefore contributed to a redirection of the rivers, causing the Paleo-lake Obweruka to break into smaller regional lakes and the drainage system to change.Tectonics-induced lacustrine plain formation can also be found at the Congo Lake Plain and the Lake Plain of South Sudan.While differential uplift can certainly create inland basins and lakes, many inland lakes are created due to a period of heavy and consistent rainfall that the region experiences.