Figure 5. The occurrence of limber pine (Pinus flexilis) in packrat middens from the Yucca Mountain region during the late Pleistocene (plotted by age on the horizontal axis and elevation on the vertical axis). Blue circles indicate that limber pine was present, yellow circles indicate that it was absent. As illustrated here, the site of the proposed repository at approximately 1524 m elevation at Yucca Mountain was at (or below) the lower limit of limber pine through the late Pleistocene.
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