Geology
Upper Wensleydale is high, open and remote U shaped valley overlying Yoredale Beds. The gradient is gentle to the north end of the valley, becoming steeper further south. Drumlins lay either side of the river, which is shallow but fast flowing. The river is fed from many gills cutting through woodland and predominantly sheep farmsteads. The Settle to Carlisle railway runs along the western side of the valley here.
Mid Wensleydale is made of Great Scar limestone under Yoredale beds that make up the valley sides which are marked with stepped limestone scars. The valley floor is made from glacial drift tails and moraine. The river here is broad and gently flowing in meanders in a stony channel. There are four tributary valleys that contribute to several waterfalls in this area.
Lower Wensleydale is a broader version of mid Wensleydale with the river gently meandering until it drops significantly at Aysgarth over the platformed waterfalls. The valley sides become increasingly wooded.
From Middleham onwards the river is a typical mid-age river and meanders in wider arcs as it flows south east.
Read more about this topic: River Ure