Radiometric dating techniques available to anthropologists

This principle presumes that the oldest layer of a stratigraphic sequence will be on the bottom and the most recent, or youngest, will be on the top.The earliest-known hominids in East Africa are often found in very specific stratigraphic contexts that have implications for their relative dating.This also works with stone tools which are found abundantly at different sites and across long periods of time.

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They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years.These strata are often most visible in canyons or gorges which are good sites to find and identify fossils.Understanding the geologic history of an area and the different strata is important to interpreting and understanding archaeological findings.Cultural seriations are based on typologies, in which artifacts that are numerous across a wide variety of sites and over time, like pottery or stone tools.If archaeologists know how pottery styles, glazes, and techniques have changed over time they can date sites based on the ratio of different kinds of pottery.

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