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In this paper, the growth characteristics of coarse-grained quartz and polymineral fine-grains are examined using data obtained as part of the SAR procedure.

Following standardisation of these data for differences in the test dose response and the magnitude of the test dose used, distinct and reproducible patterns of growth are observed and mineral-specific standardised growth curves (SGCs) are defined for multiple-grain aliquots.

Although there is stratigraphic correlation based on archaeological finds of Ahmarian origin, numerical age estimates are lacking.

We applied single-aliquot optical dating of coarse grained quartz of wadi deposits and investigated the luminescence properties in detail to achieve more accurate age information about the time of human occupation.

The dose distributions of all samples are broadly scattered and have overdispersion values between 25 and 43%, some samples are significantly skewed.

The shape of the dose distributions points to other sources of scatter, in addition to partial bleaching.

Others can only distinguish between samples bleached for a very long time and for a short time.

Empirical methods are introduced to evaluate the possible values of equivalent dose accumulated since the grains were deposited.

These methods involve the analysis of the equivalent doses and the natural IRSL signals obtained using single-disc dose determination methods.

Moreover, comparison of equivalent dose (De) values of 1 mm and 8 mm aliquots shows higher equivalent doses for the large aliquots.

Both experiments indicate that the luminescence signal is partially bleached prior to deposition.


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