Hi Darren -
You pretty well summed it up. Firestone's earlier hypothesis have been all over
the place.
I know this may sound strange to you, but when you're doing cutting edge
research you can make mistakes. Note that responsible researchers disagree with
McSween on the number of parent bodies for meteorites.
I suppose that all of this is what happens when a nuclear physicist becomes
involved in trying to explain impact data, and having no one to help him. It's
really a shame the Dr. Peiser took the Cambridge Conference over to Global
Warming Scepticism, otherwise all of this would have been hashed out a long
while back.
It's also a shame the Shoemaker died in that auto accident. He was the best the
USGS had.
Finally, it's a shame that NASA spent no money studying recent Earth impacts,
but instead wasted it on the Ares 1.
The interesting part in all of this is how many new unsuspected impacts are
being evidenced by those involved with Firestone. We now have two, one in
Alaska, another in Siberia. And the other ice impacts indicated by the
orientation of secondary impact craters.
As far as the injection mechanism goes, I'll stay with Clube and Napier for the
time being, and forego the supernova hypothesis. Which leaves me with those
isotopes to explain...
But the bottom line is that 90 to 95% of the people living in North America
died at 10,900 BCE, and those that survived left their descendants memories of
what had occurred.
In closing, even I myself have been wrong in the past, and I retain the right
to be wrong both now and in the future.
PS - someday impactites from the YD event will come on the market.
E.P. Grondine
Man and Impact in the Americas
Darren wrote:
"Okay, a review-- so far this impactor has been a 500 mile wide snowflake from
the atmosphere of a supernova hitting at hundreds of kilometers per second. It
has been an airburst over ice leaving no crater. It has left craters deeper
than Death Valley in the Great Lakes. It has caused golden showers and a rain
of diamonds that lasted for months. It shotgun-blasted iron particles into the
tusks of mammoths. It has been a comet. It has been a chondrite, and all
meteorites found by or through Nininger have been debris from it, so it was
actually all types of chondrite and everything else Nininger collected. Now,
it is an extrasolar lunar meteorite from the future.
So, to sum it up, this 500 mile 10 mile very low-density metal and stone filled
comet-asteroid supernova-produced lunar snowflake that struck at hundreds of
kilometers per second did and didn't produce impact craters and left no marks
except for the Great Lakes and thousands of very shallow overlapping, highly
oblong pits exactly like craters from an impact event except for craters from
an impact event rarely being very shallow, overlapping, highly oblong pits. It
killed off all the lost Ice Age fauna at once, except for all of the Ice Age
fauna, which went extinct at different times in different locations and spread
out over thousands to tens of thousands of years (in some spots pretty darn
well timed with the establishment of human populations, coincidence or no.)
Oh, and somehow a supernova is still involved.
That isn't refining an idea-- that is throwing everything you can think of
against the wall and hoping that some of it sticks.
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