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A river valley civilization is an agricultural nation or civilization situated beside and drawing sustenance from a river. A river gives the inhabitants a reliable source of water for drinking and agriculture. Some other possible benefits for the inhabitants are fishing, fertile soil due to annual flooding, and ease of transportation.
The 14th century in America probably also brought decline of the Mississippian culture, especially in the northern states. Dendroclimatology suggests that severe droughts ravaged the American Southwest and especially the Southern Plains early in the period, leading to a rapid cultural decline.
From the 10th to 13th centuries, the Medieval Warm Period in the northern hemisphere aided agriculture and led to population growth in parts of Europe and Asia. [201] It was followed by the Little Ice Age , which, along with the plagues of the 14th century, put downward pressure on the population of Eurasia. [ 201 ]
2500 – 1800 BCE Poverty Point culture: 2200 – 700 BCE by Location Great Basin: Desert Archaic: Middle Archaic: Late Archaic: Great Lakes: Old Copper complex: c. 4000 – c. 1000 BCE Red Ochre people: c. 1000 – 100 BCE Glacial Kame culture: c. 8000 – 1000 BCE Great Plains: Plains Archaic: c. 9500 – 5500 BCE Mesoamerica: Mexican Archaic
The first major unit of time it contained was the Cambrian period of the Paleozoic era. [6] At the time, Earth's continents were in a very different arrangement and were generally smaller than they are today. The southeastern part of the US was connected to South America and Africa and located in the polar latitudes of the southern hemisphere.
The archaeology of the Americas is the study of the archaeology of the Western Hemisphere, including North America (Mesoamerica), Central America, South America and the Caribbean. This includes the study of pre-historic/ pre-Columbian and historic indigenous American peoples , as well as historical archaeology of more recent eras, including the ...
In 1833, his exploring party discovered a route along the Humboldt River across present-day Nevada, ascending the Sierra Nevada following the Carson River and descending via Stanislaus River drainages to Monterey. His return route across the southern Sierra was via Walker Pass, named after Walker by John Charles Fremont.
The Basque language remains from that era, as do the indigenous languages of the Caucasus. The Sami are genetically distinct among the peoples of Europe, [citation needed] but the Sami languages, as part of the Uralic languages, spread into Europe about the same time as the Indo-European languages.