This site is controversial as it exposes the Lenham Beds, the date of which has been disputed, but they are now thought to be Pliocene, on the basis of their marine bivalves and gastropods.[4]
There is no access to the site, which has been built on, but geology is visible from the Pilgrims' Way.
^"Map of Hart Hill". Sites of Special Scientific Interest. Natural England. Retrieved 17 February 2018.
^"Hart Hill, (Neogene)". Geological Conservation Review. Joint Nature Conservation Committee. Archived from the original on 12 January 2018. Retrieved 11 January 2018.
^"Hart Hill citation"(PDF). Sites of Special Scientific Interest. Natural England. Retrieved 17 February 2018.