Andes: Prehistoric Period
After the Last Glacial Maximum (LGM), immigrants from Asia and probably other parts of the world entered the American continent. Once established in this ample territory, some settled in North America, while others peopled the Pacific shore, intra-mountain areas, and Amazonia of South America. Some people remained on the western side of South America, a territory whose common denominator is the Andean chain. Although it is difficult to say why Ice Age people decided to stay in the Andes, one possible reason is (and was) its extremely diverse and rich ecological environment (Lavallée 1999). From west to east, the tropical warm waters in the north, cold currents in the south, temperate and microthermal Interandean chain, the cold southern Altiplano, and the evergreen Amazonia certainly provided a number of resources for food and raw materials, depending on seasonal productivity. Besides, a combination of natural rivers resulted in a cool and extremely rich ocean stream (the...
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