Materials and Methods
Known by its specific characteristics of sand dunes, N’Goussa region (Ouargla) has been chosen as a site for our investigations. This work was a continuation of previous series of comparative studies on this material [9]. Sixteen samples have been arbitrarily taken from eight different points of a quarry. For each point, two swabs have been located. One at the surface level and the other at 30 cm in depth. The exploited sand is a homogenous mixture between the different samples taken in equal quantities. The physico-chemical analysis results are collected in Table 1