Corrections and Clarifications


See allHide authors and affiliations

Science  05 Oct 1984:
Vol. 226, Issue 4670, pp. 7
DOI: 10.1126/science.226.4670.7


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]