Thermoluminescence dating using fine grains from pottery Xxx kenya dating site
Based on those sherds for which IR signals were sufficiently intense, we use the ratio of the IR signals to argue that these outliers do not arise from incomplete resetting during manufacture.The ages from each layer are considerably over dispersed (typically by ∼25%) but average ages for each unit are consistent with each other and with the expected age range.Sand-sized quartz extracts were unsuitable, and there was insufficient sand-sized feldspar, and so polymineral fine grains were chosen for dating.Various tests for reliability were undertaken (dose recovery, dependence of D.).
This demonstrates the need for site ages to be based on multiple samples; individual shard ages are unlikely to be sufficiently accurate.
Routine laboratory tests (recycling ratio, recuperation, and dose recovery), heating and stimulation plateaus are examined to test the reliability of our SAR protocol when applied to the heated fine-grains extracted from the Pella ceramics.
The resulting equivalent doses are used to determine luminescence ages for comparison with the known ages, and the results are discussed in terms of the reliability of the IRSL ages.
Based on studies of the source of the IR stimulated luminescence signal by Murray ).