Vertical evolution of petrographic and organic geochemical parameters in Las Dueñas mire (Cantabrian Coast, North Spain)

►Organic petrology and geochemistry of Las Dueñas mire (North Spain) is included. ►The mire is at a coastal cliff location. It is a low maturity high ash profile (49 cm depth). ►The sediment age is around 9500 cal BC whereas the plant material dates back 200 years. ►Geochemical parameters indicate more humid conditions at the top of the profile