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River Twiss

River in North Yorkshire, England

Summary

River in North Yorkshire, England

Field	Value
name	River Twiss
image	River Twiss and Ingleton Viaduct - geograph.org.uk - 882495.jpg
image_caption	River Twiss and Ingleton Viaduct
source1_location	Kingsdale Beck, Keld Head
source1_coordinates
mouth_location	River Doe
mouth_coordinates
subdivision_type1	Country
subdivision_name1	England
length_km	4.17
source1_elevation	264 m
mouth_elevation	118 m

The River Twiss is a river in the county of Yorkshire, England. The source of the river is Kingsdale Beck, which rises at Kingsdale Head at the confluence of Back Gill and Long Gill in the Yorkshire Dales. Beneath Keld Head, the river changes its name to the River Twiss. It has two notable waterfalls, Thornton Force and Pecca Falls, and its course follows part of the Ingleton Waterfalls Walk, then through Swilla Glen to Thornton in Lonsdale and down to Ingleton, where it meets the River Doe to form the River Greta.

The English landscape artist J. M. W. Turner was a frequent visitor to the area, and his sketch of Thornton Force in 1816 is currently part of the Tate collection.

Course

From the caves below Keld Head, water flows and combines with Kingsdale Beck to form the River Twiss. It flows south over Thornton Force and Pecca Falls and through woodland to join the River Doe at Ingleton.

Waterfalls

The drop of Thornton Force is about 14 m. Pecca Falls has three drops totalling 30 m that fall into their own deep pools.

Geology

In its upper part, the river flows through a valley carved into horizontal beds of Carboniferous Great Scar limestone. At Thornton Force, it crosses a notable unconformity into the underlying, steeply inclined Ordovician greywackes. The unconformity is clearly visible in the face of the waterfall. The Ordovician strata influence the character of the steep and narrow Swilla Glen and its waterfalls until, just north of Ingleton, the river crosses the Craven Fault and onto Carboniferous Limestone once again.

Crossings

Ravenray Bridge (foot)
Pecca Bridge (foot)
Manor Bridge (foot)
Unnamed Road, Ingleton

Gallery

|File:River Twiss - geograph.org.uk - 1125811.jpg|River Twiss, Raven Ray footbridge. To the north the limestone slopes of Keld Head Scars rise to the summit of Gragareth |File:The River Twiss - geograph.org.uk - 519068.jpg|Manor Bridge over River Twiss |File:River Twiss Ingleton - geograph.org.uk - 1125797.jpg|Cuckoo Island in the River Twiss |File:River Twiss at Ingleton - geograph.org.uk - 882494.jpg|River Twiss seen from the road bridge in Ingleton |File:Pecca Falls, River Twiss, near Ingleton - geograph.org.uk - 1469343.jpg|Pecca Falls, River Twiss, near Ingleton |File:Thornton Force, River Twiss, Ingleton - geograph.org.uk - 830353.jpg|Thornton Force, River Twiss, Ingleton

Sources

Ordnance Survey Open Data https://www.ordnancesurvey.co.uk/business-government/tools-support/open-data-support

References

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

rivers-of-north-yorkshire lune-catchment ingleton,-north-yorkshire

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