folder Filed in Random Tusks
PNAS: Diamond peak confirmed at YDB -- and Bronze Age collapse, perhaps?
event January 22, 2014 comment 166 Comments

Screen Shot 2014-01-24 at 11.17.44 PM

 Table 1.

Bement video

Earlier GSA abstract

Co-author spotlight: Andrew S. Madden

CarterSimmsBenamara….

PNAS Lexus lane? 46,000 hits!

Significance

In 2007, scientists proposed that the start of the Younger Dryas (YD) chronozone (10,900 radiocarbon years ago) and late Pleistocene extinctions resulted from the explosion of a comet in the earths atmosphere. The ET event, as it is known, is purportedly marked by high levels of various materials, including nano-diamonds. Nanodiamonds had previously been reported from the Bull Creek, Oklahoma, area. We investigate this claim here by quantifying the distribution of nanodiamonds in sediments of different periods within the Bull Creek valley. We found high levels of nanodiamonds in YD boundary deposits, supporting the previous claim. A second spike in nanodiamonds during the late Holocene suggests that the distribution of nanodiamonds is not unique to the YD

 

Quantifying the distribution of nanodiamonds in
pre-Younger Dryas to recent age deposits along Bull Creek, Oklahoma Panhandle, USA
by George Howard

bull creek clovis comet nanodiamonds younger dryas boundary younger dryas impact event