An aminostratigraphy for the British Quaternary based on Bithynia opercula

► A stratigraphy using the intra-crystalline protein from the calcitic opercula of Bithynia is presented. ► Focused on Britain, but also using samples from a few continental sites, the coverage has been extended back to ∼3 Ma. ► This aminostratigraphy is consistent with independent geochronology, terrace stratigraphy and biostratigraphy. ► The aminostratigraphic framework has been linked to the marine oxygen isotope stratigraphy.