Dendrochronology dating relative

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Archaeologists have access to various techniques for dating archaeological sites or the objects found on those sites.There are two main categories of dating methods in archaeology: indirect or relative dating and absolute dating.The main relative dating method is stratigraphy (pronounced stra-TI-gra-fee), which is the study of layers of rocks or the objects embedded within those layers.This method is based on the assumption (which nearly always holds true) that deeper layers of rock were deposited earlier in Earth's history, and thus are older than more shallow layers.He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.

Petrie's notions about Egyptology, and archaeology in general, were revolutionary.Relative dating includes methods that rely on the analysis of comparative data or the context (eg, geological, regional, cultural) in which the object one wishes to date is found.This approach helps to order events chronologically but it does not provide the absolute age of an object expressed in years.Seriation, also called artifact sequencing, is an early scientific method of relative dating, invented (most likely) by the Egyptologist Sir William Flinders Petrie in the late 19th century.Petrie's problem was that he had discovered several predynastic cemeteries along the Nile River in Egypt that seemed to be from the same period, but he needed a way to put them in chronological order.

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