[meteorite-list] Altithermal and Impact? WS: Crackpot Impact Theory

From: drtanuki <drtanuki_at_meteoritecentral.com>
Date: Sun Sep 25 17:55:00 2005
Message-ID: <20050925215457.41617.qmail_at_web53215.mail.yahoo.com>

Dear Paul, Darren and List,
  Thank you both for your postings on this topic.
  I had the opportunity to work for the Smithsonian
Institution under Dr. Dennis Stanford from 1979-1981.
 We were excavating a bison kill site in NE Colorado
near my home. Part of my work was to study the soils
at the site to determine the paleosoil layer that
marks the Altithermal (a period of higher temperature
and dryer environment) and to map thm in relation to
the bison kill. The paleosoil layer is a distinct
clay layer that interrupts two different climatic
soils. At that time I wondered if there was a
connection between to the megafauna and other
extinctions and impact; but no REE analysis was done.
The particular site yielded camel, dire wolf and
bison. Date 6000+/- BP. Site name: Drier-Frasca,
Logan County, CO.
   Sincerely, Dirk Ross...Tokyo

--- Paul H <bristolia_at_yahoo.com> wrote:

> Darren Garrison, Sat Sep 24 22:42:22 EDT 2005,
> wrote:
>
> "Here's what another real scientist
> http://www.thesolarsystem.org/davidmorrison.html
> has to say about his new "theory":"
>
> Scientists say cosmic debris killed mammoths
> Keay Davidson, Chronicle Science Writer
> Saturday, September 24, 2005
>
http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2005/09/24/BAGG9ET78M1.DTL
>
> The article stated:
>
> "The particles appear to be of cosmic origin,
> judging by their chemical contents, which include
> titanium, iron, manganese, vanadium, rare earth
> elements, thorium and uranium. Such chemical
> composition is similar to lunar rocks brought
> back to Earth by astronauts. It also resembles
> meteorites of lunar origin that fell in the
> Middle East 10,000 years ago."
>
> Given that the Moon consists of material virtually
> identical to that composing parts of the Earth and
> very
> likely largely came from the Earth, Firestone and
> West
>
> by noting that their particles are similar in
> composition
> to lunar material are presenting evidence that
> actually
> refutes their claim that the particles of cosmic
> origin.
>
> Marco, Pleistocene archaeologist, wrote:
>
> "The other point is, that mammoths did *not* get
> extinct all at once at ~13 000 BP. On Wrangel Island
>
> in the arctic for example, they survived untill 4000
> BP.
> In Eurasia, they disappear between ~15000 and 12000
> bp, in what seems to be a gradual process."
>
> This is an excellent point among others. In
> addition,
> in
> "Quaternary Paleobiology Update Debate continues
> over
> the cause of Pleistocene megafauna extinction" in
> The
> Quaternary Times Newsletter of the American
> Quaternary
>
> Association, vol. 29, no. 1, May 1999 at
>
http://www4.nau.edu/amqua/v29n1/quaternary_paleobiology_update.htm
> ,
> it is stated:
>
> "It now appears that the major megafaunal exinction
> event took place at 11,400 14C yr B.P. This event
> included the extinction of camels, horses, giant
> sloths,
> Pleistocene bison, and all other genera of
> megafaunal
> mammals that did not survive beyond 11,400 14C yr
> B.P. , with the exception of the proboscideans.
> Mammoths and mastodons persisted beyond 11,400 yr
> B.P. Stafford et al. have dated the extinction of
> North
> American mammoth and mastodon to 10,900-10,850 yr
> B.P. So it now appears that there were two distinct
> extinction episodes."
>
> Also, a person can look at "14C-Chronostratigraphy
> of
> Late Pleistocene Megafauna Extinctions in Relation
> to
> Human Presence in the New World by Thomas W.
> Stafford, Jr., Russell Graham, Ernest Lundelius,
> Holmes Semken, Greg McDonald, and John Southon
> for the Clovis in the Southeast Technology Time
> and Space October 26-29, 2005 conference at:
> http://www.clovisinthesoutheast.net/stafford.html
> and http://www.clovisinthesoutheast.net/speakers.htm
> .
>
> In terms of megafauna in North America, there were
> two
>
> extinction episodes separated by 500 years. The
> event
> argued for by Firestone and West does not make any
> sense in terms of how such an event would
> selectively
> cause the extinction of camels, horses, giant
> sloths,
> Pleistocene bison, and other genera of megafaunal
> mammals about 11,400 BP and then 500 years later
> wipe out North American mammoths and mastodons
> some 500 years later.
>
> They have a lot of questions to answer about their
> theory.
>
> People can also look at "Evidence of a Catastrophic
> Impact Event at the End of the Clovis Era" at:
> http://www.clovisinthesoutheast.net/firestone.html
>
> Best Regards,
>
> Paul
>
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Received on Sun 25 Sep 2005 05:54:57 PM PDT