Barrington Chalk Pit is a 97.1 hectare geological Site of Special Scientific Interest near Barrington in Cambridgeshire. It is a Geological Conservation Review site. This large quarry is the only surviving exposure of the Cretaceous Cambridge Greensand. Fossils include brachiopods and fish teeth. It is overlain by thick sequences of chalk and Totternhoe Stone. Large parts of the site are a working quarry which is closed to the public, while other areas have been filled in and are now fields which are crossed by footpaths.