Dealing with outliers and offsets in radiocarbon dating

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Green indicates presence of sapwood, black indicates that pith or last ring under the bark is present. Hd = Heidelberg; MAMS = Curt-Engelhorn-Zentrum Archaeometrie.C data and placement of the 10-year tree-ring samples (mid-points) within the 213-year chronology.Ibises were regarded as physical manifestations of the god Thoth and worshiped by the ancient Egyptians.A small number of Sacred Ibis were chosen as ‘sacred animals’, based on physical markings, and were reared for the temples.Dendro sample SOF-14 comes from the lower levels of the structure and includes the waney edge (the last ring formed under the bark): this is placed at AD 538 12/-14.

Every model in Figure 5 provides a wiggle-match consistent within its 95.4% probability range with the tentative dendro-dating of the 213-year dendrochronology.

The mean (µ) best fit point ranges vary only by 4 years across these models.

Figure 6 (bottom of diagram) shows the two possible placements of the 213-year dendrochronology within 95.4% probability ranges for Model 3 (i) and Model 10 (ii).

Models 6–10 consider the 22-date set, with the data from YMK-359 included (see Figures 5 & 8).

The enlarged dataset offers placements consistent with the 16-date set.

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