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at first interpreted as falsifying the Alvarez theory—dissipated as
more and more data were collected. Time and again, when paleon-
tologists returned to the outcrop, they found what had eluded them
before. In contrast, as more data were collected, the foram evidence
seemed only to grow more complicated. But today, with a few noted
exceptions, most specialists believe that the foram evidence is also
compatible with an impact-induced extinction. I conclude that the
evidence from all three groups—ammonites, plants, and forams—cor-
roborates predictions 1 and 2: (1) Prior to the K-T boundary, most
species were not already going extinct; rather their disappearance was
sudden and right at the boundary. (2) Except where reworking has
occurred, species of taxa that did not survive the K-T extinction are
not found above the iridium horizon. Now it is time to turn to the
dinosaurs, the creatures that got us interested in the K-T boundary in
the first place.
