As published, figure 2 in the report "Disruption of the terrestrial plant ecosystem at the Cretaceous-Tertiary boundary, western interior" by R. H. Tschudy et al. (7 Sept., p. 1030) contained two errors. The break in the stratigraphic column should have been 3 m, and the iridium concentration should have been in parts per trillion. The correct figure is reproduced below. [see figure in source PDF].
已发表的报告“白垩纪-第三纪边界，西部内陆地区陆地植物生态系统的破坏”中，R.H.特舒迪等人（7 月 9 日，第 1030 页）的图 2 有两个错误。地层柱状图的中断应该是 3 米，铱浓度应该是每万亿份中的部分。下面是正确的图。[见原始 PDF 中的图]。
