Finally, a new dating of the four sites together with other structures of similar age was carried out using the Pavón-Carrasco model.
The rate of decrease is 1/2 the quantity at death every 5,730 years. Comparing the amount of C-14 in a dead organism to available levels in the atmosphere produces an estimate of when that organism died. Radiocarbon dates provide a statistical range instead of an absolute year (eg., A. 950 ± 20 years), meaning that the plant died sometime between A. The earth’s north magnetic pole moves back and forth over time due to magnetic changes in the earth’s core.The sampled material came from four areas, covering different geological contexts: Katerini, Olympiada, and Polymylos in mainland Greece, and the island of Paros.Extensive rock-magnetic experiments, including identification of the dominant ferromagnetic minerals present, their domain state, and mineralogical alterations during laboratory treatments, have been carried out in order to examine the magnetic properties of the studied materials and prove their suitability for reliable archaeomagnetic determinations.Because secular variation is a repetitive looping motion through time, it is possible to have multiple date options for a feature.All date options are reported to the archaeologist, then makes a decision as to which best matches the other data from the site (Sternberg 1982, Eighmy 1990).