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Subject: Re: Is the Permian extinction tied to a nearby Pulsar star?
From: meredith lamb mlamb1@..........
Date: Sat, 27 May 2000 14:49:00 -0700

Tom Schmitt wrote:

> Question
> At one or more of the mass extinctions Iridium spikes are found in the
> sediments.  I think it was
> Walter Alverez who first found this but I can not remeber where it was.  I
> think in one of the
> limestones in Italy, well anyway.
> If there is a large Iridium spike associated with the Permian mass extection
> (which I think there is) then it would suggest
> the comet hypotheseis.
> Yes a pulsar produces alot of energy but with 1/(r^2) r being
> 600x365x1440x60x300000 km,  there is
> lot  of attenuation.
> Interesting idea I will look at the web sites.  Back in the late 70's Karl
> Felessa looked at the fossil
> record in terms of  plate tectonics and showed that many major faunal
> changes correlated with tectonics.
> Tom Schmitt
> tschmitt@..............

Thanks Tom,

A big part of this explosion (or implosion), would be a massive
amount of gamma rays radiation.  I've read where (no immediate
reference) this could cause alot of devastation, even for the

Another web site says that the plant life went on unattenuated,
during this event.  In a way...this doesn't make sense either, if
radiation was there in massive amounts.  One theory casts
some speculation on climate change.

Arriving much later than any radiation, would probably be a
shock wave/s from such an explosion.  Whether such a impact/s
would do in conjunction with it is somewhat speculation.  Could
visualize a disruption of some geo-magnetic earth fields, for
some time.  To add to the complexity...its possible this shock
front/s, could have disrupted the Ort cloud comets toward earth.

Interesting stuff.  Total arm chair/web speculation on my part.

Meredith Lamb


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Larry Cochrane <cochrane@..............>