Nubian desert

Another important point is the similarity of size distributions among the different soil samples. It made little difference whether they were taken from sand dunes in Dar Albeida, Mali alluvial soils in Matan, Senegal or gravel-covered soils from the Nubian desert in the Sudan or Tamarasset, Algeria. A secondary maximum near 20 xm radius, which is apparent from Fig. 7-11, also was frequently seen. D Almeida and Jaenicke (1981) hypothesized that the gap between this coarse size fraction and submicron particles,... 

In sum, the philosophical worldview of Ubuntu is embraced from the Nubian desert to the Cape of Good Hope and from Senegal to Zanzibar. ... 

The Nubian sedimentary formation has a different origin than the Nile sediments, and the two types of sediments can be easily distinguished on the basis of trace element contents (4). As Figure 1 shows, these ancient variegated shales and ferrugineous sandstone beds are exposed in parts of the low desert surface west of the cultivation zone, as well as in the high desert areas that border the Great Wadi. 

In most areas of the wadi floor and the low desert area, the Nubian formation is covered by an average of 5-7 m of Pleistocene Nile silts (9). These older Nile sediments represent different episodes in the evolution of the Nile River (10-13), The oldest Nile sediments (called Protonile) in the area, exposed at high (about 125 m above sea level) Pleistocene terraces, were deposited during the Lower to Middle Paleolithic period (10). 

Figure 4. Concentrations of Co and Sc in bulk samples of sediments found at Hierakonpolis. The Nubian sandstone ( ) and the Protonile sediments contain far less Co and Sc than the Neonile (Masmas, Sahaba, and El Kab) sediments ( + ). For comparison the average concentrations for Units B ( ), N (x), C ( ), and the NRSC (A) are shown. Although sediments from Units B and N are Neonile, the low concentrations suggest higher proportions of sand (dilutant) than in the older Neonile sediments from the low desert area.

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