Matches in DBpedia 2016-04 for { ?s ?p "The Younger Dryas impact hypothesis, also known as the Clovis comet hypothesis, is one of the competing scientific explanations for the onset of the Younger Dryas cold period after the last glacial period. The hypothesis, which scientists continue to debate, proposes that the climate of that time was cooled by the impact or air burst of one or more comets.The general hypothesis states that about 12,900 BP calibrated (10,900 14C uncalibrated) years ago, air burst(s) or impact(s) from a near-Earth object(s) set areas of the North American continent on fire, disrupted climate and caused the Quaternary extinction event in North America. This resulted in the extinction of most of the megafauna, and the rapid demise of the North American Clovis culture. The Younger Dryas ice age lasted for about 1,200 years before the climate warmed again. These events are also seen as part of the Holocene extinction phenomenon.One or more big explosions may have occurred above or possibly on the Laurentide Ice Sheet in the region of the Great Lakes. Though no major impact crater has been identified, the proponents argue that it would be physically possible for such an air burst to have been similar to but orders of magnitude larger than the Tunguska event of 1908. The hypothesis proposed that animal and human life in North America not directly killed by the blast or the resulting wildfires would have suffered due to the disrupted ecologic relationships affecting the continent.The impact of this postulated event (or series of events) goes beyond the Americas. A number of studies reported evidence of this impact around the world. For example, James Wittke et al. argued for the deposition of impact spherules 12,800 years ago across four continents, including Europe and the Middle East."@en }
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- Younger_Dryas_impact_hypothesis abstract "The Younger Dryas impact hypothesis, also known as the Clovis comet hypothesis, is one of the competing scientific explanations for the onset of the Younger Dryas cold period after the last glacial period. The hypothesis, which scientists continue to debate, proposes that the climate of that time was cooled by the impact or air burst of one or more comets.The general hypothesis states that about 12,900 BP calibrated (10,900 14C uncalibrated) years ago, air burst(s) or impact(s) from a near-Earth object(s) set areas of the North American continent on fire, disrupted climate and caused the Quaternary extinction event in North America. This resulted in the extinction of most of the megafauna, and the rapid demise of the North American Clovis culture. The Younger Dryas ice age lasted for about 1,200 years before the climate warmed again. These events are also seen as part of the Holocene extinction phenomenon.One or more big explosions may have occurred above or possibly on the Laurentide Ice Sheet in the region of the Great Lakes. Though no major impact crater has been identified, the proponents argue that it would be physically possible for such an air burst to have been similar to but orders of magnitude larger than the Tunguska event of 1908. The hypothesis proposed that animal and human life in North America not directly killed by the blast or the resulting wildfires would have suffered due to the disrupted ecologic relationships affecting the continent.The impact of this postulated event (or series of events) goes beyond the Americas. A number of studies reported evidence of this impact around the world. For example, James Wittke et al. argued for the deposition of impact spherules 12,800 years ago across four continents, including Europe and the Middle East.".
- Q1092095 abstract "The Younger Dryas impact hypothesis, also known as the Clovis comet hypothesis, is one of the competing scientific explanations for the onset of the Younger Dryas cold period after the last glacial period. The hypothesis, which scientists continue to debate, proposes that the climate of that time was cooled by the impact or air burst of one or more comets.The general hypothesis states that about 12,900 BP calibrated (10,900 14C uncalibrated) years ago, air burst(s) or impact(s) from a near-Earth object(s) set areas of the North American continent on fire, disrupted climate and caused the Quaternary extinction event in North America. This resulted in the extinction of most of the megafauna, and the rapid demise of the North American Clovis culture. The Younger Dryas ice age lasted for about 1,200 years before the climate warmed again. These events are also seen as part of the Holocene extinction phenomenon.One or more big explosions may have occurred above or possibly on the Laurentide Ice Sheet in the region of the Great Lakes. Though no major impact crater has been identified, the proponents argue that it would be physically possible for such an air burst to have been similar to but orders of magnitude larger than the Tunguska event of 1908. The hypothesis proposed that animal and human life in North America not directly killed by the blast or the resulting wildfires would have suffered due to the disrupted ecologic relationships affecting the continent.The impact of this postulated event (or series of events) goes beyond the Americas. A number of studies reported evidence of this impact around the world. For example, James Wittke et al. argued for the deposition of impact spherules 12,800 years ago across four continents, including Europe and the Middle East.".