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Re: Meteor May Not Have Destroyed Dinosaurs Afterall?
Thanks for the correction... My data was from my visit there in the mid 80's and
I can accept that I remembered wrong or that there are better calculations since then.
Regards,
Elton
Bernd Pauli HD wrote:
>
> GeoZay@aol.com schrieb:
>
> > Elton: I recall a "fact" that the Meteor Crater impact released
> > such a thermal blast that "all life" (sic) within a 800 mile
> > diameter was killed immediately.<<
>
> > I can't seem to find my little "brochure" about meteor crater when
> > I visited it last, but it seems to me that the region of "all life"
> > that was killed from the thermal blast covered a diameter of 75 miles
> > or 200 miles...I can't remember which? Perhaps neither, but I don't
> > think it was 800 miles?
>
> No, it wasn't. See the latest issue of S&T, Nov. 1999, pp. 48-53:
>
> Calamity at Meteor Crater by David A. Kring, excerpts:
>
> The resulting pressure gradient generated a wind exceeding 2,000 km per
> hour, which stripped any grass and flattened all the trees within 14 to
> 22 km of the impact. Roughly a third of the trees several kilometers
> farther out might have fallen victim to the gale as hurricane-force
> winds buffeted the landscape as far away as 40 km. The blast completely
> destroyed the vegetation over an area of 800 to 1,500 square kilometers
> around the impact site.
> Past studies suggest that the pressure wave from the Meteor Crater event
> would have killed all large mammals within 3 to 4 km of the impact and
> damaged the lungs of others out to distances of 6 to 12 km.
>
> Best wishes and good night around the globe,
>
> Bernd
>
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