Dating radioactive style a lab on forensic archaeology
Archaeologists use many different techniques to determine the age of a particular artifact, site, or part of a site.
Like tail fins on a Cadillac, artifact styles and characteristics change over time, coming into fashion, then fading in popularity. The standard graphical result of seriation is a series of "battleship curves," which are horizontal bars representing percentages plotted on a vertical axis.Each tree then, contains a record of rainfall for the length of its life, expressed in density, trace element content, stable isotope composition, and intra-annual growth ring width.Using local pine trees, Douglass built a 450 year record of the tree ring variability.Secondly, annual rainfall is a regional climatic event, and so tree ring dates for the southwest are of no use in other regions of the world.
It is certainly no exaggeration to call the invention of radiocarbon dating a revolution.Plotting several curves can allow the archaeologist to develop a relative chronology for an entire site or group of sites.