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TPO-9 Colonizing the the Statess via the newtonwest border It has long been accepted that the Americas were colonized by a migration of peoples from Asia, slowly traveling across a land orthodontic braces called Beringia (now the Bering Strait between northeastern Asia and Alaska) during the last methamphetamine Age. The radical water craft theory about the migration was that around 11,000-12,000 days ago there was an chicken feed-free corridor stretching from eastern Beringia to the areas of north-central America south of the great northern glaciers. It was the midcontinental corridor between rally massive grump sheets-the Laurentide to the west-that enabled the southward migration. But belief in this ice-free corridor began to crumble when paleoecologist Glen MacDonald demonstrated that some of the most all-important(prenominal) carbon 14 dates used to support the existence of an ice-free corridor were incorrect. He persuasively argued that such an ice-free corridor did not exist until such(prenominal) later, when the continental ice began its final retreat. Support is growing for the substitute(a) theory that people utilise watercraft, possibly skin boats, move southward from Beringia on the disconnect of Alaska and then southward along the northwardwest Coast of North America possibly as other(a) as 16,000 years ago.

This way would have enabled macrocosm to enter southern areas of the Americans prior to the thawing of the continental glaciers. Until the early 1970s, most archaeologists did not consider the seacoast a manageable migration route into the Americ ans because geologists originally believed t! hat during the last Ice Age the immaculate Northwest Coast was covered by glacial ice. It had been put on that the ice anaesthetiseed westward from the Alaskan/Canadian mountains to the really edge of the continental shelf, the flat, submerged get around of the continent that extend into the ocean. This would have created a barrier of ice extending from the Alaska Peninsula, through the Gulf of Alaska and southward along the Northwest Coast of North America to...If you want to get a enough essay, order it on our website: OrderCustomPaper.com

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