Image: Was first nuclear test the start of new human-dominated epoch, the Anthropocene? [Click image to enlarge]
Calhoun CZO PI Dan Richter is one of several authors of a new paper in Quaternary International that attempts to define and delineate the Anthropocene: "When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal".
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When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal. Zalasiewicz J., C.N. Waters, M. Williams, A.D. Barnosky, A. Cearreta, P. Crutzen, E. Ellis, M.A. Ellis, I.J. Fairchild, J. Grinevald, R. Leinfelder, J. McNeill, C. Poirier, D. Richter, W. Steffen, D. Vidas, M. Wagreich, A.P. Wolfe, and A. Zhisheng (2015): Quaternary International 383: 204-207