Supplementary Material – Neogene Plant Macrofossils from West Antarctica Reveal Persistence of Nothofagaceae Forests into the Early Miocene

This supplementary material includes supporting data and figures for the study “Neogene Plant Macrofossils from West Antarctica Reveal Persistence of Nothofagaceae Forests into the Early Miocene”. The dataset comprises: U–Pb zircon isotopic data from ash layer samples, including standard reference materials Concordia diagrams and weighted mean age plots Fieldwork photographs and outcrop images Locality maps and ablation point data used for site referencing and sample collection These materials provide additional context for the geochronological interpretation and field setting of the fossil-bearing strata on King George Island, West Antarctica.