[Rockhounds] Another extinction impact-13 KYA-No Red Herring

[Kreigh Tomaszewski]

 From burning vegetation. See 
http://news.bbc.co.uk/2/hi/science/nature/7808171.stm



On Saturday, Jan 3, 2009, at 08:51 America/Detroit, J Bryan Kramer 
wrote:

> So where did all the carbon come from if this was a hit totally 
> absorbed by
> the ice sheet. Would a carbonaceous chondrite not break up before 
> impact?
>
> BK
>
> On Sat, Jan 3, 2009 at 01:33, Mr EMan <mstreman53 at yahoo.com> wrote:
>
>> Red Herring?   I have to disagree.  As one who is a part time 
>> researcher--
>> sampling glacial outwash planes in the northeastern US for glass 
>> microsphere
>> deposits. I've kept abreast of this topic before it became a topic.  
>> There
>> is evidence mounting weekly that a major cometary impact occurred 
>> over north
>> eastern North America approx. 12,900-13,100ybp. Strata of "black sand 
>> mats"
>> containing glass microspheres, charcoal, nano-diamonds, and
>> Buckyballs are bening located all over eastern North America: From
>> caves in near both Cinncinatti and Sandusky Ohio over to the enigmatic
>> "Carolina
>> Bays" features up and down the east coast.  Meteoric iron embedded in
>> Mammoth Tusks and Bison horns from other times suggest large impacts 
>> occured
>> several times earlier in the present ice age.
>>
>>  Ice dam breaching  ( if that is what it was) apparently  occurred at
>> several places along the icesheet front simultaneously. While it is 
>> true
>> that massive meltwater runoff is likely to have changed ocean 
>> currents, an
>> impact can account for causing that sudden melting. The present lack 
>> of
>> identified impact crater is understandable given the true depth of the
>> existing ice sheet(2miles?) is not known but, could have absorbed 
>> most or
>> all of the impact whithout leaving easily located deposits of insitu
>> impactites.  There is no primary strata left to analize--as of yet 
>> but many
>> are working on it finding evidence in situ not just in outwash 
>> deposits. If
>> we look at the rock called Ice and think of melting as erosion, it 
>> puts
>> erosion on a accelerated timescale never seen before. Which has good 
>> and bad
>> points for reconstructing the events.
>>
>> Hardly a red herring but a mounting body of evidence which ties 
>> together
>> the younger dryas anomomally, regional extinction of large ice age 
>> animals
>> populations which never returned and, dissapearance of the Human 
>> Clovis
>> culture in mid and northern North America for approximately 800 years.
>>
>> Eman
>>
>> --- On Fri, 1/2/09, Dora Smith <tiggernut24 at yahoo.com> wrote:
>> Thanks.  The article is a red herring.   It has been satisfactorily
>> demonstrated that the abrupt cooling was the result of the massive
>> outpouring of melted ice into the northern Atlantic when an ice 
>> bridge that
>> had held it back melted.
>>
>>
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>
>
>
> -- 
>
> ""It often seems to me that the night is much more alive and richly 
> colored
> than the day."
>
>                       Vincent van Gogh
> J Bryan Krämer
> North Florida, USA
> photos at:
> http://pbase.com/photoburner
>
>
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