The geology of South Trafford is Keuper marl with some Keuper waterstone and sandstone, whilst the geology of North Trafford is Bunter sandstone.[14] The River Mersey runs east to west through the area, separating North Trafford from South Trafford; other rivers in Trafford include the Bollin, the River Irwell, Sinderland Brook, and Crofts Bank Brook.