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Many ancient peoples, such as the Egyptians living along the Nile, depended on annual floods and alluvial deposits to replenish the soils they were farming.Alluvial soils are usually nutrient-rich and good for agriculture.It is generally a raised area above the rest of the city where the most important sacred and secular buildings are brought together.

In the United States, anthropology is divided into four sub-disciplines: archaeology, biological/physical anthropology, cultural anthropology, and linguistics.

Linguists study languages, especially their development and their function within human culture. Back dirt - The excavated, discarded material (sediment, dirt) from a site that has generally been sifted for artifacts and is presumed to be of no further archaeological significance.

Antiquarian - A term generally indicating a pre-20th-century collector of ancient artifacts before the development of scientific archaeology and the establishment of standards for excavating and preserving finds. This material may later be used to refill test pits, an action referred to as "back filling." Balk - A side wall of an excavated unit (square) or a partition of earth left standing between adjoining excavation units.

It was characterized by large bifaces, particularly hand axes.

This tool-making technology was a more complex way of making stone tools than the earlier Oldowan technology.

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