Data for: The geochemical and mineralogical fingerprint of West Antarctica's weak underbelly: Pine Island and Thwaites glaciers

The full dataset is based on seafloor surface sediment from 26 sites and consists of strontium and neodymium isotope, and major and trace element compositions of fine-grained sediments, as well as 40Ar/39Ar ages of individual ice-rafted hornblende and biotite grains, clay mineral compositions and rock magnetic properties of bulk sediment fractions.