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Re: "Forensic" Evidence Of Dinosaur Killer
>The problem is that in every version of the impact theory I've ever
>seen, the upper limit and lower limit cross. A ten-mile-diameter
>planetoid is simply too large to have produced _only_ the effects that
>we see in the fossil record. It should have done much, much more.
Why should it? Look at the extreme cases.
1) The object is needle-shaped and comes in end-on. It slices through the
crust like butter and expends all its energy warming up the mantle and
pushing the Earth. Result: a little local vulcanism, an earthquake or two,
and we're done. Romulus and Remus are suckled by a cyanodont, and this
message is written to you by a descendant of Sinraptor.
2) The object is pancake-shaped and "laid out across the sky like a patient
etherized upon a table." It comes in at an acute angle like a frisbee and
explodes just under the surface. Result: the biosphere looks like Venus for
a few millenia. Romulus and Remus are raised on algae and this message is
written to you by an annelid worm, if at all.
There's a lot of room for almost any result. The geological record, as I
understand it, is consistent with something in between. That is, Romulus
and Remus were raised by a canid and this message is written to you by
someone who is only politically a dinosaur.
P.S. It occurs to me that we've had this exchange before, and perhaps too
recently for it to be edifying or amusing to anyone on the list. For that
reason, I think this will be my last on the topic. You're invited to take
the last swing, if you like. I'll spend months plotting my revenge (Fools
-- I'll show them all! Bwahahaha!)