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Re: "No Bolides!"
>Besides, many of the above taxa such as the dinosaurs and ammonites
>doing well beforet the catastrophe and then suddenly disappeared. In
>likelyhood, _yes_ it was a bolide that started it all!
>Thomas R. Lipka
Within the last few years some good evidence has been presented
showing a marked decline of general dinosaur diversity on the generic
level during the late Cretaceous. Although the taxa that are found
near the K/T seem to be well represented by large numbers of
individuals, faunal lists from the Western Interior of N.A. for that
time period suggest that a large number of genera had become extinct
during the late Cretaceous with out any replacement groups filling in
the empty niches. It may be misleading to say that dinos were doing
well until the impact. Rather, it would appear that select taxa were
thriving at the time.
It is also dangerous to make projections about global dinosaur
populations based on the limited data currently available from
Cretaceous terrestrial localities.
Cautous, but curious in Denver,