[meteorite-list] The YD impact event, again and again and again and again

From: E.P. Grondine <epgrondine_at_meteoritecentral.com>
Date: Wed, 23 Jun 2010 08:52:29 -0700 (PDT)
Message-ID: <126421.70198.qm_at_web36901.mail.mud.yahoo.com>

Hi Paul, everyone -

Having worked on the Cambridge Conference as a place to deal with these kind of mistakes in a prompt manner, it is personally very frustrating to me to have had Dr. Peiser move it over entirely to global warming scepticism.

As pointed out in the wikipedia link below, there were several successors to Clovis. Among them were the Sioux, i.l. Folsom, who appear to have survived around the region noted in this paper. (The actual survival location the Sioux remembered.) However, based on the frequency of points, initial population densities were much much lower.

Note that the date for Folsom appearance is broadly in line with the YD impact event. A Sioux account of the YD event may be read at http://cosmictusk.com.

a very tired
E.P. Grondine
Man and Impact in the Americas
(some call it a great book, some a landmark book; others embarass themselves by displaying their ignorance.)

"The analyses suggest that Folsom first appeared around 12,800 calBP in the northern High Plains and spread north and south from there. They also suggest that the spread of Folsom was, at least in part, the result of population expansion. In addition, the analyses indicate that the spread of Folsom was relatively fast for a prehistoric diffusion but well below the maximum velocity that has been estimated for such events. These findings, in turn, have implications for the hypotheses that have been put forward to explain the Clovis?Folsom transition. They refute the idea that the Clovis?Folsom transition resulted from an extraterrestrial impact over northern North America at 12,900 ? 100 calBP but are consistent with the alternative proposal that the transition was a response to climate-driven environmental change."

http://en.wikipedia.org/wiki/Clovis_culture


      
Received on Wed 23 Jun 2010 11:52:29 AM PDT