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Stratigraphic dating

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The resulting scatterplot showed the form of a horse-shoe where the graves were arranged on the curve according to their chronological order.

Similarly, a mapping of the component scores for the first two axes of the correspondence analysis result will display a parabola if the design styles considered are controlled by one factor only (like chronology).

This is called the arch effect by Hill and Gauch (1980).

Both Kendall and Jensen & Høilund Nielsen (1997) created artificial data sets to show that the parabola results in ideal circumstances.

Though according to David George Kendall (1971), Petrie's paper showed already a deep understanding of the mathematics of the seriation problem (Quote: ".my view Petrie should be ranked with the greatest applied mathematicians of the nineteenth century"). 8) list of landmarks of statistics in archaeology the paper of Robinson (1951) is the first entry.

Where absolute dating methods, such as carbon dating, cannot be applied, archaeologists have to use relative dating methods to date archaeological finds and features.Seriation is a standard method of dating in archaeology.It can be used to date stone tools, pottery fragments, and other artifacts.Of course, for a small examples like this, no computer programs are needed to find the best ordering, but for larger data sets like the 900 graves studied by Petrie they are extremely helpful.The data presented in this example was simulated by Win Basp.Contextual seriation is often used for reconstructing the chronological sequence of graves as only the presence or absence of a design style or type is important.