Cataclysmic Comet Crash In Canada Changed World Climate 12,900 Years Ago, Wiped Out Many Large Mammals And Mammoths
Credit: Barry Roal Carlsen, University of Wisconsin
The findings appear next week in the online Early Edition of the Proceedings of the National Academy of Sciences.
The impact occurred about 12,900 years ago, at the beginning of the Younger Dryas period, and marks an abrupt global change to a colder, dryer climate with far-reaching effects on both animals and humans. In North America, the big animals all vanished, including mastodons, camels, giant ground sloths and saber-toothed cats. Their human hunters, known to archaeologists as the Clovis people, set aside their heavy-duty spears and turned to a hunter-gatherer subsistence diet of roots, berries and smaller game.
The high temperatures of the meteorite impact 12,900 years ago produced mm-sized spherules of melted glass with the mullite and corundum crystal structure shown here.
Credit: Mukul Sharma
“The Younger Dryas cooling impacted human history in a profound manner,” says Dartmouth Professor Mukul Sharma, a co-author of the study. “Environmental stresses may also have caused Natufians in the Near East to settle down for the first time and pursue agriculture.”
It is not disputed that these powerful environmental changes occurred, but there has long been controversy over their cause. The classic view of the Younger Dryas cooling interlude has been that an ice dam in the North American ice sheet ruptured, releasing a massive quantity of freshwater into the Atlantic Ocean. The sudden influx is thought to have shut down the ocean currents that move tropical water northward, resulting in the cold, dry climate of the Younger Dryas.
But Sharma and his co-authors have discovered conclusive evidence linking an extraterrestrial impact with this environmental transformation. The report focuses on spherules, or droplets of solidified molten rock expelled by the impact of a comet or meteor. The spherules in question were recovered from Younger Dryas boundary layers at sites in Pennsylvania and New Jersey, the layers having been deposited at the beginning of the period. The geochemistry and mineralogy profiles of the spherules are identical to rock found in southern Quebec, where Sharma and his colleagues argue the impact took place.
Using a binocular microscope, Dartmouth geochemist Mukul Sharma examines impact-derived spherules that he and his colleagues regard as evidence of a climate-altering meteor or comet impact 12,900 years ago.
Credit: Eli Burakian
“We have for the first time narrowed down the region where a Younger Dryas impact did take place,” says Sharma, “even though we have not yet found its crater.” There is a known impact crater in Quebec — the 4-kilometer wide Corossal crater — but based on the team’s mineralogical and geochemical studies, it is not the impact source for the material found in Pennsylvania and New Jersey.
People have written about many impacts in different parts of the world based on the presence of spherules. “It may well have taken multiple concurrent impacts to bring about the extensive environmental changes of the Younger Dryas,” says Sharma. “However, to date no impact craters have been found and our research will help track one of them down.”
Contacts and sources:
John Cramer
Dartmouth College
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Wow
Definitely the big bang!
All the scientists agree; the debate is over! The mammoths were living in America so this automatically makes them evil and responsible for all of the World’s ills…unless they were Liberals of course.
This could have been the very reason for constructing the pyramids after the last great flood – in around 9,200 BC.
1 43 The texts hidden
PYRAMIDS DIVERT IMPEDIMENTS ~ ENNUI.
FURTHERS MOLECULAR LEX TALIANUS
LEX (statute, uncommon law of) TALIONIS
(lesser retaliation/path of least resistance)
4 29 Iƒ (is) FREQUENCIES OPENED MOLECULAR
SELF EVIDENT PARAMETER CHAFFEUR (drive)
1) the word pyramid means PYRE AMID. (PER-NET-ER obsolete)
2) the date of construction of the great pyramid is ca 9,200BC
according to the sky calendar on the ceiling of one of the “air shafts”.
3) according to the hidden texts as follows they (the big pyramids)
were for diverting celestial visitors per Tunguska ( as one example )