GSSP for Upper Pleistocene Subseries


As yet undefined.

Notes on Derivation of Age:

The base is currently undefined but provisionally dated at ~129 ka relating to significant warming at the beginning of the Last Interglacial.

Additional Comments:

The term Upper Pleistocene, at the rank of subseries, was ratified by the Executive Committee of the IUGS on 30 January 2020. The selection of a GSSP for the Upper Pleistocene Subseries and its corresponding stage is in progress.


Head, M.J. 2019. Formal subdivision of the Quaternary System/Period: present status and future directions. Quaternary International 500, 32–51. [PDF]

Head, M.J., Pillans, B., Zalasiewicz, J.A., and the ICS Subcommission on Quaternary Stratigraphy, 2021. Formal ratification of subseries/subepochs for the Pleistocene Series/Epoch of the Quaternary System/Period. Episodes 44(3): 241-247