Supplemental Data

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New Ages for the Last Australian Megafauna: Continent-Wide Extinction About 46,000 Years Ago
Richard G. Roberts, Timothy F. Flannery, Linda K. Ayliffe, Hiroyuki Yoshida, Jon M. Olley, Gavin J. Prideaux,Geoff M. Laslett, Alexander Baynes, M. A. Smith, Rhys Jones, and Barton L. Smith

Supplementary Material

Supplemental Figure 1. Optical ages for megafauna-bearing sediments dated in this study. A single weighted-mean age is plotted for stratigraphic units dated using more than one sample or grain-size fraction. Sites are arranged from youngest (top) to oldest (bottom). Filled circles designate samples associated with remains in articulated anatomical position, and open circles represent samples from sites where remains are not articulated or articulation is uncertain. The shaded band indicates the 51-40 ka time interval (the calculated 95% confidence interval for megafaunal extinction). Articulated remains may not have been recovered from the upper megafaunal unit at Mammoth Cave (site 24), so the weighted mean age (68 ± 7 ka) of the articulated museum specimens is plotted. The Cuddie Springs (site 6) samples are shown with a left-pointing arrow to indicate that younger sediments also occur in the dated units. The Montford's Beach (site 12) and Du Boulay Creek (site 27) samples are marked with a right-pointing arrow to indicate the presence of partially bleached grains in these samples, and the Victoria Fossil Cave samples from Grant Hall (site 18) and Fossil Chamber (site 19) are likewise flagged because the dated samples were collected from near the top of both deposits, so the underlying megafauna-bearing sediments must be older.

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