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 K/T
boundary core from ODP Site 1049 showing from bottom to top sediment
containing a diverse assemblage of latest Cretaceous microfossils (white),
impact ejecta (green), layer rich in extraterrestrial material (orange),
and sediment containing a newly evolving assemblage of Tertiary microfossils
(white and gray).
Click for larger image.
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 Changes
in the strontium isotopic composition of seawater across the
K/T boundary which suggests massive weathering likely related to acid
rain in the aftermath of the K/T impact (after MacLeod et al., 2001).
Click for larger
graph in pdf.
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