The Cataclysm That Erased History 12,000 Years Ago

The Younger Dryas stadial, also referred to as the Big Freeze, was a geologically brief (1,300 ± 70 years) period of cold climatic conditions and drought which occurred between approximately 12,800 and 11,500 years BP. The Younger Dryas stadial is thought to have been caused by the collapse of the North American ice sheets, although rival theories have been proposed

The Younger Dryas impact event is a contested hypothesis that an air burst from a purported comet above or even into the Laurentide Ice Sheet north of the Great Lakes set all of the North American continent ablaze around 12,900 years ago. The hypothesis attempts to explain the extinction of many of the large animals in North America and the unproven population decreases in the North American stone age Clovis culture about at the end of the Pleistocene epoch. Proponents claim the existence of a charred carbon-rich layer of soil found at some 50 Clovis-age sites across the continent. It has been criticized for not being consistent with paleoindian population estimates.
Impact specialists have studied the claim and concluded that there never was such an impact, in particular because various physical signs of such an impact cannot be found. Evidence supporting the theory however has been further suggested by the 2012 paper presented to the PNAS (T.E. Bunch et al.) which looked at apparent high temperature impact melt products found in multiple sites of the ‘black mat’ across three continents dating to 12 900 years ago, This is further indicated by the discovery (Kurbatov et al. 2010) of the presence of a rich layer of nanodiamonds in the Greenland ice sheet coinciding with this date
The Younger Dryas stadial, also referred to as the Big Freeze, was a geologically brief (1,300 ± 70 years) period of cold climatic conditions and drought which occurred between approximately 12,800 and 11,500 years BP. The Younger Dryas stadial is thought to have been caused by the collapse of the North American ice sheets, although rival theories have been proposed.
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 try the sahara dessert as well then we we have a large earth quake

The Cataclysm That Erased History 12,000 Years Ago | Beyond Science