This former quarry exposes rocks from the Rutland Formation and up to nearly the top of the White Limestone Formation, dating to the Middle JurassicBathonian stage, 169 to 166 million years ago. The site is the type section for a freshwater clay bed which is thought to result from a widespread storm deposit.[4]
There is no access to the site, but the southern end can be viewed from a footpath from Cranford St John.
^"Cranford St John citation"(PDF). Sites of Special Scientific Interest. Natural England. Archived from the original(PDF) on 4 March 2016. Retrieved 17 April 2017.