红岩
The site of Sizewell A occupies 245 acres (99 hectares) north of Sizewell. It is on a low plateau above flood level. The geological foundation comprises Norwich Crag Formation and Red Crag Formation bedrock of Pleistocene age above Eocene London Clay. The Crag deposits predominantly consist of medium dense and dense sands with thin layers of clay and silt and fossiliferous shelly horizons. The Crag strata extend to a depth of 200 feet (60 metres) below ground level. In 1972/73 Sizewell A was awarded the Christopher Hinton trophy in recognition of good housekeeping