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Atlantis: The Cataclysm of Mauritania
Graham Hancock Ancient Civilizations are being worked out finally
Evidence from a historic site appears to confirm the date of a comet strike that killed thousands, wiped out many large animal species, and triggered a mini ice age, according to research led by Dr Martin Sweatman of the School of Engineering (The University of Edinburgh).
Analysis of symbols carved onto stone pillars at Gȍbekli Tepe in southern Turkey – one of the world’s most important archaeological sites – suggests that a swarm of comet fragments hit Earth around 11,000BC. They ushered in a cold climate that lasted more than 1,000 years.
Engineers studied animal carvings made on a pillar – known as the vulture stone – at the site. By interpreting the animals as astronomical symbols, and using software to match their positions to patterns of stars, researchers dated the event to 10,950BC.
The dating from the carvings agrees well with timing derived from an ice core from Greenland, which pinpoints the event – probably resulting from the break-up of a giant comet in the inner solar system – to 10,890BC.
The carvings appear to have remained important to the people of Gobekli Tepe for millennia, suggesting that the event and cold climate that followed likely had a very serious impact.
Researchers from the University of Edinburgh suggest the images were intended as a record of the cataclysmic event, and that a further carving showing a headless man may indicate human disaster and extensive loss of life.
Furthermore, symbolism on the pillars indicates that the long-term changes in Earth’s rotational axis was recorded at this time using an early form of writing, and that Gȍbekli Tepe was an observatory for meteors and comets.
https://www.research.ed.ac.uk/portal/files/33194700/MAA_TEMPLATE_Decoding_Gobekli_Tepe_final.pdf
The Younger Dryas (c. 12,900 to c. 11,700 years BP) was a return to glacial conditions which temporarily reversed the gradual climatic warming after the Last Glacial Maximum.
Physical evidence of a sharp decline in temperature over most of the Northern Hemisphere has been discovered by geological research. This temperature change occurred at the end of what the earth sciences refer to as the Pleistocene epoch and immediately before the current, warmer Holocene epoch. In archaeology, this time frame coincides with the final stages of the Upper Paleolithic in many areas.
The change was relatively sudden, taking place in decades, and it resulted in a decline of 2 to 6 degrees Celsius (3.6 to 10.8 degrees Fahrenheit) and advances of glaciers and drier conditions, over much of the temperate northern hemisphere.
Since 1916 and the onset and then the refinement of pollen analytical techniques and a steadily-growing number of pollen diagrams, palynologists have concluded that the Younger Dryas was a distinct period of vegetational change in large parts of Europe during which vegetation of a warmer climate was replaced by that of a generally-cold climate, a glacial plant succession that often contained Dryas octopetala. The drastic change in vegetation is typically interpreted to be an effect of a sudden decrease in (annual) temperature, unfavorable for the forest vegetation that had been spreading northward rapidly. The cooling not only favored the expansion of cold-tolerant, light-demanding plants and associated steppe fauna but also led to regional glacial advances in Scandinavia and a lowering of the regional snow line.[2]
The change to glacial conditions at the onset of the Younger Dryas in the higher latitudes of the Northern Hemisphere, between 12,900–11,500 calendar years BP, has been argued to have been quite abrupt.[12] It is in sharp contrast to the warming of the preceding Older Dryas interstadial. It has been inferred that its end occurred over a period of a decade or so,[13] but the onset may have even been faster.[14] Thermally-fractionated nitrogen and argon isotope data from Greenland ice core GISP2 indicate that its summit was approximately 15 °C (27 °F) colder during the Younger Dryas[12][15] than today.
In Great Britain, beetle fossil evidence suggests that mean annual temperature dropped to −5 °C (23 °F),[15] and periglacial conditions prevailed in lowland areas, and icefields and glaciers formed in upland areas.[16] Nothing of the period's size, extent, or rapidity of abrupt climate change has been experienced since its end
The current impact hypothesis states that the air burst(s) or impact(s) of a swarm of carbonaceous chondrites or comet fragments set areas of the North American continent on fire, causing the extinction of most of the megafauna in North America and the demise of the North American Clovis culture after the last glacial period.[8] The Younger Dryas ice age lasted for about 1,200 years before the climate warmed again. The Hiawatha Glacier impact crater in Greenland is offered as evidence for the Younger Dryas impact hypothesis, due to its location and the speculative possibility that could be simultaneous with the start of the Younger Dryas cold period and megafauna extinctions which occurred approximately around the same era
In 2018, evidence of a 31km diameter impact crater along with evidence of shocked quartz, was found below the Hiawatha Glacier in Greenland, which may be connected with the Younger Dryas period.
https://en.wikipedia.org/wiki/Younger_Dryas_impact_hypothesis