Ben Knowle () is a 1.5 hectare geological Site of Special Scientific Interest in Somerset, notified in 1984.
Ben Knowle is a natural outcrop of Celestine rising from the Somerset Levels where contacts with the host rock, Tea Green Marl, can be seen which illustrate the stratigraphic setting of the mineral deposit.English Nature citation sheet for the site (accessed 7 August 2006)
References
External links English Nature website (SSSI information)