PNAS: Diamond peak confirmed at YDB — and Bronze Age collapse, perhaps?

 Table 1.

Bement video

Earlier GSA abstract

Co-author spotlight: Andrew S. Madden

Carter, Simms, Benamara….

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

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