In the lower course of the river, it opens into the Tees Estuary: there is a lot of deposition evidence by mudflats at low tide.
The mud of the estuary is an important ecosystem, supporting a wide range of birds and other flora and fauna
The River Tees - Landforms of Erosion
High force waterfall
Interlocking spurs
Meanders
The River Tees - High force waterfall
High force, the UK's largest waterfall by volume when in full flow is located in the upper course. An area of hardrock (whinestone) is located above a layer of soft rock (sandstone and shale) and together they create this waterfall.
The River Tees - Interlocking spurs
The interlocking spurs and found near Cauldron Snout.
The upper course has hard impermeable rocks. Here, vertical erosion has formed a v-shaped valley.
The River Tees - Meanders
The meanders are found near Yarm.
In its lower course, the river Tees has a lot of meanders, particularly between Darlington and Yarm. The meandering river has widened the river valley to create a floodplain. There are also levees along this stretch of the river which have formed from previous floods.
