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TPO-9 Colonizing the the Statess via the newtonwest sliding board It has long been accepted that the Americas were colonized by a migration of peoples from Asia, slowly traveling across a land straddle called Beringia (now the Bering Strait between northeastern Asia and Alaska) during the last frappe Age. The ascendent water craft theory about the migration was that around 11,000-12,000 eld ago there was an internal-combustion engine-free corridor stretching from eastern Beringia to the areas of magnetic north America south of the great northern glaciers. It was the midcontinental corridor between fray massive nut case 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) radiocarbon 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 utilize watercraft, possibly skin boats, move southward from Beringia on the disjunction of Alaska and then southward along the northeastwardwest Coast of North America possibly as other(a) as 16,000 years ago.

This lane would have enabled macrocosm to enter southern areas of the Americans prior to the dissolve of the continental glaciers. Until the early 1970s, most archaeologists did not consider the playground slide a managea ble migration route into the Americans becau! se geologists originally believed that 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 crack 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 good essay, order it on our website: BestEssayCheap.com

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