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I just heard a lecture on hadrosaurs of the
Cretaseou[D[D[D[D[D[D[D[D[DLate Cretaceous, afterwards
an interesting discussion took place. The speaker, Sandy Ludlum, says
that the marine K-T boundry and the terrestrial K-T boundry may not
coincide with each other. Anyone have any ideas on this?
Also, di[During the same s[Ddiscussion, it was pointed out that many specie of
dinosaur were already extinct and numbers of existing specie were decreasing
at the time slightly before the K-T incident. This was due to the inter-
continental see[Da during the Cretaceous expanding and contracting its east to
west boundries, in the e[Dwest limiting the range of habitat east of the
to a narrow strip of deltaic environments. It is entirel[D[Dley possible
vast majority of all genera were extinct or becoming so before thi[De K-T
incident due to environmental factors (dictated by techto[D[D[Dtonics).
What do you fl[Dolks think?