Ben Knowle () is a 1.5

hectare The hectare (; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), or 10,000 m2, and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre 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 ...

Somerset ( en, All The People of Somerset) , locator_map = , coordinates = , region = South West England , established_date = Ancient , established_by = , preceded_by = , origin = , lord_lieutenant_office =Lord Lieutenant of Somerset , lord_ ...

, notified in 1984. Ben Knowle is a natural outcrop of Celestine rising from the

Somerset Levels The Somerset Levels are a coastal plain and wetland area of Somerset, England, running south from the Mendip Hills, Mendips to the Blackdown Hills. The Somerset Levels have an area of about and are bisected by the Polden Hills; the areas to ...

where contacts with the host rock, Tea Green

Marl Marl is an earthy material rich in carbonate minerals, clays, and silt. When hardened into rock, this becomes marlstone. It is formed in marine or freshwater environments, often through the activities of algae. Marl makes up the lower part o ...

, can be seen which illustrate the

stratigraphic Stratigraphy is a branch of geology concerned with the study of rock layers (strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy has three related subfields: lithostrati ...

setting of the mineral deposit.English Nature citation sheet for the site
(accessed 7 August 2006)

References

External links

English Nature website
(SSSI information) Sites of Special Scientific Interest in Somerset Sites of Special Scientific Interest notified in 1984 Geology of Somerset {{Somerset-geo-stub