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10-Apr-2015 00:49

ABSTRACT: After a 20-year hiatus (1955–1975) during which few archaeologists discussed fluoride dating, the method again received attention in the 1980s and 1990s when some argued for its validity.

As a dating method, fluoride dating depends on the rate at which fluorine ions replace hydroxyl ions in osseous tissue.

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Multiple dating methods are usually required before dates are accepted.In social sciences there are many key concepts and terms that are crucial for students to know and understand.Absolute dating relies on biological, chemical (radiometric), geological/electromagnetic, or historical investigation to obtain the date range of a deposit.(Examples of each method, respectively, are dendrochronology, carbon-14, archaeomagnetism, and the known year a city was destroyed.) Relative dating is based on stratigraphy (the tendency of younger layers to lie over older layers) and comparison of artifacts from undated sites to sites where dates are established.All dating methods have limitations and can be complicated by turbation, or mixing, of layers by human or natural actions.

Often it can be hard to determine what the most important social sciences concepts and terms are, and even once you’ve identified them you still need to understand what they mean.To help you learn and understand key social sciences terms and concepts, we’ve identified some of the most important ones and provided detailed definitions for them, written and compiled by Chegg experts.