During the Younger Dryas period there was an unexplained extinction of 75% of the North American megafauna. The Glacier Ice Impact Hypothesis established a mathematical foundation that can serve as a physics-based model for the Younger Dryas extraterrestrial impact. In contrast to the Younger Dryas Meteor Impact theory, an unsettled scientific study many proponents of Atlantis lately use to explain how Atlantis was lost, there is a more verifiable scientific explanation behind the flood that is said to have destroyed (the Cyclades Plateau) Plato's Atlantis. 2007; Kennett et al. A map of the places where platinum spikes have been found at layers corresponding to the Younger Dryas – including Wonderkrater in South Africa, which is the site of the latest study Details. Younger Dryas, also called Younger Dryas stadial, cool period between roughly 12,900 and 11,600 years ago that disrupted the prevailing warming trend occurring at the end of the Pleistocene Epoch (which lasted from 2.6 million to 11,700 years ago). 4)The disappearance of the Clovis People. Credit: UCSB. "They put a bad shine on it." So far, no reproducible, diagnostic evidence has, however, been reported. A monster lurks under northeastern Iowa. Called the Younger Dryas impact hypothesis, the notion is that some kind of large impact occurred in northern North America about 10,900 to 12,900 years ago, during the Younger Dryas … Credit: Wits UniversityNoting that meteorites are rich in platinum, Thackeray said “Our finding at least partially supports the highly controversial Younger Dryas Impact Hypothesis (YDIH). Map showing platinum spikes. If confirmed, its dating could establish the Younger Dryas impact hypothesis as fact. The resulting period is known as the Younger Dryas, a mysterious 1000-year blip in history. The sudden cooling is typically … The ellipticity of the Carolina Bays is used to determine the angle of impact, which is also the approximate launch angle of the ice chunks from Saginaw Bay. The Younger Dryas occurred during the transition from the last glacial period into the present interglacial (the Holocene). How the North American ice sheet vanished in such a short period is a big part of this. A map of the world showing where similar platinum spikes have been found dated to about 12,800 years ago. Many scientists have suggested – with evidence – that the Younger Dryas was triggered by a meteorite impact. Temperatures bottomed out in a way not seen in regular earth periods. At the end of the Pleistocene period, approximately 12,800 years ago — give or take a few centuries — a cosmic impact triggered an abrupt cooling episode that earth scientists refer to as the Younger Dryas. “Our evidence is fully consistent with the Younger Dryas impact hypothesis,” says Thackeray. In 24 dated stratigraphic sections in 10 countries of the Northern Hemisphere, the YDB layer contains a … THE YOUNGER-DRYAS IMPACT AND THE WORLDWIDE FLOOD The YD ImpactThe YD event is an episode marked by abrupt increases in snowfall and dramatic changes to flora, fauna, climate, and the oceans (Firestone et.al., 2007). During this time, the North American, or Laurentide, ice sheet was rapidly melting and adding freshwater to the ocean. I … Understanding what mechanisms triggered and terminated this event remains enigmatic, but it is fundamental for gaining insights into the inner workings of Earth’s climate system. The Younger Dryas impact hypothesis suggests that multiple airbursts or extraterrestrial impacts occurring at the end of the Allerød interstadial resulted in the Younger Dryas cold period. According to researchers, wonderkrater is the 30th place in the world for such evidence. The Black Mats may not be from fires The idea that the black mats at the Younger Dryas Boundary are related to burning from the passage of a meteorite through the atmosphere is not supported by the following map from Haynes (2008). The region with black mats seems to be beyond 1500 km from Saginaw … The Younger Dryas Impact. The Younger Dryas is, therefore, an even bigger mystery. Author supplied Reality check. The Younger Dryas Impact Hypothesis was adopted mainly by non earth-sciences related researchers and especially the mass media, ... accompanied by historic maps and depictions. Advocates of the Younger Dryas impact pinned too much on it, he says: the fires, the extinction of the megafauna, the abandonment of the Clovis sites. Supporters of pre-existing theories for the demise of the American megafauna and the occurrence of the Younger Dryas mini ice age have, naturally, been highly critical of this recent interloper into their long-standing stalemate. The Younger Dryas Impact Hypothesis, and the evidence to support it, is a reminder of how much can change when a … The Younger Dryas Stadial is a time of extreme cold and tundra conditions which followed the Lateglacial Interstadial and immediately preceded the sudden warming at the onset of the present interglacial. The latest find is the Wonderkrater in South Africa. Others have postulated that the Younger Dryas event was caused by a meteor impact. That monster is in the form of a giant buried basin, the result of a meteorite impact in central North America over 470 million years ago. ‘A major cosmic-impact event has been proposed at the onset of the Younger Dryas cooling episode at 12,800 years (plus or minus 150 years) before the present, forming the Younger Dryas Boundary (YDB) Layer distributed across up to 50 million square kilometers on four continents. The research debate surrounding this impact event has been very contentious. About 12,800 years ago, a giant broken-up comet. The Younger Dryas impact hypothesis proposes that fragments of a disintegrating comet struck the Earth around 12,800 years ago. In the same time period archaeologists have also noted the … study thus lays out a test for the occurrence of a Younger Dryas bolide impact, constrained by observations of the recent Tunguska impact. These fragments bombarded North … Again, the Younger Dryas is a period whose fauna is largely known from radiocarbon dates on individual bones rather than from discrete assemblages. The following image has been marked with a red arc with a radius of 1500 km from Saginaw bay. To date, the most widely accepted theory is that steady global warming affected the seas around the ice sheet. The Younger Dryas (YD) cold reversal interrupts the warming climate of the deglaciation with global climatic impacts. In this study, we used a combination of well … This map shows the Younger Dryas Boundary locations that provided data for the analysis. Scientists have been gathering evidence of events that suggest a violent extinction episode wiping the Woolly mammoths, Sabertooth tiger, and other large mammals from the planet. Find link is a tool written by Edward Betts.. Longer titles found: Younger Dryas impact hypothesis () searching for Younger Dryas 44 found (304 total) alternate case: younger Dryas Glacial relict (216 words) exact match in snippet view article find links to article in connection with a temporary advance of the ice-front during the Younger Dryas. The Younger Dryas (YD) was an ∼1,300-y period of extreme climate that dramatically reversed the course of global warming that brought the last Ice Age to a close. It was the most significant contributor to rising sea levels. ‘A major cosmic-impact event has been proposed at the onset of the Younger Dryas cooling episode at 12,800 years (plus or minus 150 years) before the present, forming the Younger Dryas Boundary (YDB) Layer distributed across up to 50 million square kilometers on four continents. the Younger Dryas impact hypothesis and was initially based on elevated concentrations (compared to background) of several markers in the Allerød-Younger Dryas boundary (~12.85 ka) at sites in North America and one in Europe. These markers include, among others, magnetic spherules, nanodiamonds, lechatelierite, and platinum group elements (Firestone et al. The linkage that Hancock makes between the hypothesized extra-terrestrial impact that triggered the Younger Dryas and the destruction of Atlantis is, when you listen closely, peculiar. Evidence for this theory includes carbon rich soil layers that mark the start of the Younger Dryas event containing nanodiamonds, metallic microspherules, carbon spherules, magnetic spherules, iridium, charcoal, soot, and fullerenes enriched in helium-3. The Melott et al. The Debate on Younger Dryas . Younger Dryas peaks in platinum have also been found in Greenland, Eurasia, North America, Mexico, and recently also in Chile.
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