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Re: Extinction scenarios



My family was once above the Yubaheebie crater (sorry for the
spelling-this is phonetic) in California when an underground Nuclear
test was going on in Nevada.  This was about 5 pm and we felt a slight
quake-like tremor.  That evening there was a sandstorm as the quake had
shifted every single rock in the desert JUST ENOUGH for the prevading
wind to scower out any dust trapped underneath and to blow this sudden
(overburden?) in front of it.  
So not only would you have this secondary heat wave, you've have
sandstorms and dust storms where conditions suit.

-Betty Cunningham

TomHopp@aol.com wrote:
>     That said, I'd urge you to take a look at file footage of nuclear blasts
> that are occasionally trotted out for TV dramatic purposes.  In most, you can
> see an initial white flash from the detonation, followed shortly by a shock
> wave of air pushed outward by the explosion.  This shows in aerial film as an
> expanding circle of atmospheric disturbance, or if viewed from the ground, the
> detonation flash followed a few moments later by a sudden outward pressure
> blast against buildings, trees, etc., which soon are pulled back toward the
> center again as the overpressure is relieved and results in a momentarily
> lowered air pressure.  Somewhere in between is the time spent within the
> hyperpressurized front of the wave.  This pressure is not white hot in footage
> of nuclear blasts, because they are so miniscule compared to the K/T event.
> How long would the time of white-hotness last?  I don't know - best ask an
> astrobleme specialist or nuclear bomb engineer.  However, it might be long
> enough (a second or two) to parboil the skin off your hadrosaur, and to light
> up a pretty big conflagration of bushes and trees.