More Evidence of a Cosmic Catastrophe 10,000 B.C.

I've written before of the evidence suggesting that some cosmic catastrophe, be it a meteor impact or major solar eruption, touched off the Younger Dryas event approximately 12,000 years ago. However, there has been a lot of resistance to the idea that the Younger Dryas was caused by an impact. Much of the evidence has been gathered from sites in North America showing nanodiamonds and the laying down of layers of ash, but scientist differ on how to interpret the data.

    Now comes a paper from researchers in South Africa that have found additional evidence of an impactor 12,800 years ago in South Africa. In "New research supports hypothesis that asteroid contributed to mass extinction," it relates:

       The team, led by Professor Francis Thackeray of the Evolutionary Studies Institute at the University of the Witwatersrand in Johannesburg, South Africa, discovered evidence of a remarkable “platinum spike” at a site called Wonderkrater in the Limpopo Province, north of Pretoria in South Africa. Working with researcher Philip Pieterse from the University of Johannesburg and Professor Louis Scott of the University of the Free State, Thackeray discovered this evidence from a core drilled in a peat deposit, notably in a sample about 12 800 years old. This research was published in Palaeontologia Africana.

      Noting that meteorites are rich in platinum, Thackeray said “Our finding at least partially supports the highly controversial Younger Dryas Impact Hypothesis (YDIH). We seriously need to explore the view that an asteroid impact somewhere on earth may have caused climate change on a global scale, and contributed to some extent to the process of extinctions of large animals at the end of the Pleistocene, after the last ice age.”  

The article continues:

      Many mammals became extinct in North America, South America and Europe at the time of the Younger Dryas. In South Africa a few extraordinary large animal species became extinct, not necessarily at exactly 12 800 years ago, but close to that period. These megafauna include a giant African buffalo, a large zebra, and a very big wildebeest. 

      Human populations may also have been indirectly affected at the time in question. In North America there is a dramatic termination of the stone tool technology of Clovis people. Remarkably, archaeologists in South Africa have detected an almost simultaneous termination of the Robberg stone artefact industry associated with people in some parts of the country, including the area around Boomplaas near the Cango Caves in the southern Cape, close to the town of Oudshoorn.

      “Without necessarily arguing for a single causal factor on a global scale, we cautiously hint at the possibility that these technological changes, in North America and on the African subcontinent at about the same time, might have been associated indirectly with an asteroid impact with major global consequences,” says Thackeray. “We cannot be certain, but a cosmic impact could have affected humans as a result of local changes in environment and the availability of food resources, associated with sudden climate change.” 

Interesting stuff!