Canyards Hills () is a 64.1 hectare (158.4 acre) biological and geological

site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of ...

South Yorkshire South Yorkshire is a ceremonial and metropolitan county in the Yorkshire and Humber Region of England. The county has four council areas which are the cities of Doncaster and Sheffield as well as the boroughs of Barnsley and Rotherham. In N ...

. The site was notified in 1990. This site possesses the most impressive examples in England and Wales of 'ridge-and-trough' or 'tumbled ground.' Beneath a 10 m high cliff, the north-facing valley side above Broomhead Reservoir and the hamlet of Wigtwizzle is a chaotic mass of sub-parallel ridges, separated by intervening narrow areas of marshy ground. The site is formed in Upper Carboniferous Millstone Grit and shows the most extreme form and best example of 'tumbled ground', with innumerable small Millstone Grit blocks (controlled by jointing) taking up a large landslip.

References

Canyards Hills
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Natural England Natural England is a non-departmental public body in the United Kingdom sponsored by the Department for Environment, Food and Rural Affairs. It is responsible for ensuring that England's natural environment, including its land, flora and fauna, ...

''. Retrieved on 2009-02-14 Geography of Sheffield Sites of Special Scientific Interest notified in 1990 Sites of Special Scientific Interest in South Yorkshire {{England-SSSI-stub

See also

References