But there is an overall lack of terrestrial fossils in the uppermost Hell Creek fm. Stuff really thins out ~20 m below the Hell Creek/Fort Union contact in eastern MT and in many places is almost non existant, so something other than an impact must have been happening to the environment.
But wasn't the multiple-impact theory as of recently more about the Chixculub bolide breaking up on entry and thus multiple, but essentially *simultaneous* impacts? Analysis of the bolide's trajectory could help.
Eike
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