The quarry and railway cutting exposes rocks dating to the Bathonian stage of the Middle Jurassic, about 167 million years ago. It is described by Natural England as of national importance for the understanding of the Jurassic Period in Britain as it allows correlation of rocks of the Oxford area to be correlated with those of the Midlands. The site has calcareous grassland with diverse vertebrates, including the internationally protected great crested newt.[6]