Figure 3
From: The antiquity of Nullarbor speleothems and implications for karst palaeoclimate archives

A history of Nullarbor speleogenesis. A compilation of available U-Pb ages, plotted vs. latitude. The size of individual circles indicates the analytical uncertainty on each age determination while the colours code with age – Quaternary samples are orange while Pliocene and late Miocene samples are coloured blue. Dotted lines indicate one possible interpretation of the north-south structure in the data.