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. 2014 Dec 1;111(52):18460–18465. doi: 10.1073/pnas.1416072111

Fig. 3.

Fig. 3.

Summary of late Pleistocene climatic changes, Marine Isotope Stages, vegetation in eastern Beringia, and inferred biogeographic history of American mastodons. Age (ka) = 103 years ago. The marine δ18O data for foraminifera are from ref. 36, and vegetation data are from refs. 21 and 37.