Stone Farm Rocks or Stone Hill Rocks is a 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 of

East Grinstead East Grinstead is a town in West Sussex, England, near the East Sussex, Surrey, and Kent borders, south of London, northeast of Brighton, and northeast of the county town of Chichester. Situated in the extreme northeast of the county, the civ ...

West Sussex West Sussex is a county in South East England on the English Channel coast. The ceremonial county comprises the shire districts of Adur, Arun, Chichester, Horsham, and Mid Sussex, and the boroughs of Crawley and Worthing. Covering an ar ...

. It is a

Geological Conservation Review The Geological Conservation Review (GCR) is produced by the UK's Joint Nature Conservation Committee and is designed to identify those sites of national and international importance needed to show all the key scientific elements of the geological a ...

site. This is typical of many sandstone crags in mid-Sussex which expose the

Tunbridge Wells Sand Formation The Tunbridge Wells Sand Formation is a geological unit which forms part of the Wealden Group and the uppermost and youngest part of the unofficial Hastings Beds. These geological units make up the core of the geology of the Weald in the English c ...

, part of the

Wealden Group The Wealden Group, occasionally also referred to as the Wealden Supergroup, is a group (a sequence of rock strata) in the lithostratigraphy of southern England. The Wealden group consists of paralic to continental (freshwater) facies sedimentary ...

which dates to the

Early Cretaceous The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pro ...

between 140 and 100 million years ago. It displays a variety of sedimentary structures in three dimensions and is described by

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, ...

as "an important site for the study and interpretation of sedimentary structures in the upper Lower Tunbridge Wells Sand". The site has been owned by the

British Mountaineering Council The British Mountaineering Council (BMC) is the national representative body for England and Wales that exists to protect the freedoms and promote the interests of climbers, hill walkers and mountaineers, including ski-mountaineers. The BMC ...

since 2001, who run it for the benefit of climbers. There are 74 identified climbs on the rocks. Bolt belays have been installed at the top of many of the climbs to reduce erosion of the site.

References

{{SSSIs West Sussex Sites of Special Scientific Interest in West Sussex Geological Conservation Review sites East Grinstead Climbing areas of England Sport in West Sussex