Pleistocene deposits of the Thames valley. Iver, Bucks. Stack of brickearth with some included chalk, left standing in purser's Pit, Iver Terrace.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Pleistocene deposits of the Thames valley. Iver, Bucks. Stack of brickearth with some included chalk, left standing in purser's Pit, Iver Terrace. Wellcome Collection. Source: Wellcome Collection.