More on the AGU Fall Meeting

13 Feb 2010

George Howard's web site has a post on a talk by Tom Stafford, author of Redefining the Age of Clovis; Implications for the Peopling of America which was published in the journal Science in 2007. Stafford's talk at the AGU conference laid out details of a very narrow layer of evidence at the Younger Dryas boundary, at a site in Texas, a thin 1 to 2cm layer of material that was host to trillions of nano-diamonds and high levels of soot known as aciniform. In addition, the layer draws a curtain upon large mammals (the species that became extinct) as they do not occur above the layer. In addition, George has posted a guest blog by Herman Burchard. January 5th ... Neanderthal fossils from Croatia appear to be several thousand years older than originally thought. They are now being dated to 33,000 years ago when previously they had been dated at 28,000 years ago. Refinements in sample purification techniques are responsible for the more accurate dates. However, we may also note that this brings them almost into line with the event at around 35,000 years ago that witnessed widespread losses of large mammals such as mammoth and appears to mark a boundary of some kind between Neanderthals and modern humans. Details of this event can be found in Firestone, West and Warwick-Smith, The Cycle of Cosmic Catastrophes