This site exposes loess, probably dating to the glacial Wolstonian Stage between 352,000 and 130,000 years ago. It contains the fossils of land snails, and as loess in Britain is usually unfossiliferous, it is one of the few sites where loess fauna can be studied.[5]
^"Spot Lane Quarry (Mass movement)". Geological Conservation Review. Joint Nature Conservation Committee. Archived from the original on 12 January 2018. Retrieved 12 January 2018.
^"Spot Lane Quarry citation"(PDF). Sites of Special Scientific Interest. Natural England. Retrieved 17 March 2018.