K-T Boundary

[Ethical At]

I'm currently reading _Dinosaurs, Diamonds, and Things from
Outer Space: The Great Extinction_ by David Brez Carlisle,
1995. In it, Carlisle suggests that the K-T extinction may
have been due to a supernova or comet instead of the widely
held view of an asteroid impact. He says that the Yucatan
submerged crater may just be the result of many asteroid or
comet-like objects being thrown off or diverted from a
supernova event.

1. Has anyone read his book?
2. What are your thoughts on it?

If the K-T extinction was a result of the Yucatan asteroid
impact, it seems that the K-T boundary layer (with iridium and
shock-metamorphosed quartz grains) would be thicker the closer
one went to the impact. And these phenomenon would also be
more concentrated.

3. Does anyone know of any studies, papers, books that
analyze the K-T boundary thickness in this way?

Thanks!

[Charles]

I am certain that Science News reported on this phenomena many
times over the last ten years. Several of their articles
report that the depth of the K-T layer is significantly
thicker as one approaches the Yucatan. It is going to be
difficult for reviewers to disprove the K-T connection because
the dates work out... it is the proverbial "smoking gun." Good
luck to these new theorists.

a search at any library will give you multiple references. Try
this one and see if you make any progress
http://www.lib.ncsu.edu/ but you cannot get to the electronic
journals unless you are on campus, or have an ID. try
searching for "extinction" or "dinosaurs" and etc.... --chas

Ethical Atheist wrote:

> I'm currently reading _Dinosaurs, Diamonds, and Things from
> Outer Space: The Great Extinction_ by David Brez Carlisle,
> 1995. In it, Carlisle suggests that the K-T extinction may
> have been due to a supernova or comet instead of the widely
> held view of an asteroid impact. He says that the Yucatan
> submerged crater may just be the result of many asteroid or
> comet-like objects being thrown off or diverted from a
> supernova event.
>
> 1. Has anyone read his book?
> 2. What are your thoughts on it?
>
> If the K-T extinction was a result of the Yucatan asteroid
> impact, it seems that the K-T boundary layer (with iridium
> and shock-metamorphosed quartz grains) would be thicker the
> closer one went to the impact. And these phenomenon would
> also be more concentrated.
>
> 1. Does anyone know of any studies, papers, books that
> analyze the K-T boundary thickness in this way?
>
> Thanks!

[Pete]

on Fri, 10 May 2002 15:20:49 GMT, Ethical Atheist
<ethical@ethicalatheist.com> sez: ` I'm currently reading
_Dinosaurs, Diamonds, and Things from Outer Space: The ` Great
Extinction_ by David Brez Carlisle, 1995. In it, Carlisle
suggests ` that the K-T extinction may have been due to a
supernova or comet instead of ` the widely held view of an
asteroid impact. He says that the Yucatan ` submerged crater
may just be the result of many asteroid or comet-like `
objects being thrown off or diverted from a supernova event. `
` 1. Has anyone read his book? ` 2. What are your thoughts on
it? ` ` If the K-T extinction was a result of the Yucatan
asteroid impact, it seems ` that the K-T boundary layer (with
iridium and shock-metamorphosed quartz ` grains) would be
thicker the closer one went to the impact. And these `
phenomenon would also be more concentrated. ` ` 1. Does anyone
know of any studies, papers, books that analyze the K-T `
boundary thickness in this ` way? ` Wrong newsgroup. This
belongs in sci.geo.geology, with sci.bio.paleontology a
possible second. Here we deal strictly with anthropoid
evolution, so you're about 40My too early.` `

--
==========================================================================

vincent@triumf[munge].ca Pete Vincent
Disclaimer: all I know I learned from reading Usenet.

[Ethical At]

Thanks for the info. As I was reading the book, and he
theorized on a supernova - the K-T boundary thickness was the
first thing that came to my mind. I try to dig up the Science
News articles you referenced. I'm just starting to study the
K-T boundary (for personal interest only). The Carlisle book
seems to have many other questionable claims too

Charles <lmno@mindspring.com> wrote in message
news:3CDBEFAF.D7CDEC94@mindspring.com...
> I am certain that Science News reported on this phenomena
> many times over
the
> last ten years. Several of their articles report that the
> depth of the
K-T
> layer is significantly thicker as one approaches the
> Yucatan. It is going
to be
> difficult for reviewers to disprove the K-T connection
> because the dates
work
> out... it is the proverbial "smoking gun." Good luck to
> these new
theorists.
>
> a search at any library will give you multiple references.
> Try this one
and see
> if you make any progress http://www.lib.ncsu.edu/ but you
> cannot get to the electronic journals unless you are on
> campus, or
have
> an ID. try searching for "extinction" or "dinosaurs" and
> etc.... --chas
>
> Ethical Atheist wrote:
>
> > I'm currently reading _Dinosaurs, Diamonds, and Things
> > from Outer Space:
The
> > Great Extinction_ by David Brez Carlisle, 1995. In it,
> > Carlisle
suggests
> > that the K-T extinction may have been due to a supernova
> > or comet
instead of
> > the widely held view of an asteroid impact. He says that
> > the Yucatan submerged crater may just be the result of
> > many asteroid or comet-like objects being thrown off or
> > diverted from a supernova event.
> >
> > 1. Has anyone read his book?
> > 2. What are your thoughts on it?
> >
> > If the K-T extinction was a result of the Yucatan asteroid
> > impact, it
seems
> > that the K-T boundary layer (with iridium and
> > shock-metamorphosed quartz grains) would be thicker the
> > closer one went to the impact. And these phenomenon would
> > also be more concentrated.
> >
> > 1. Does anyone know of any studies, papers, books that
> > analyze the K-T boundary thickness in this way?
> >
> > Thanks!