Hook Norton Cutting is a nature reserve along two stretches of a disused railway line separated by a tunnel. Most of it is unimproved calcareous grassland with a rich variety of flora. The site is notable for its bee species, including one which has only been recorded at three other sites in the country, Andrena bucephala. The cutting exposes rocks dating to the Middle Jurassic, around 167 million years ago, which are the type section of the Hook Norton Member of the Chipping Norton Formation. Hook Norton Bank is a steeply sloping limestone grassland by the River Swere.[5]