in Figure 9
(adapted from Harrell and Brown 1992: Table 4)
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Geologic
Age Name Description
Quaternary Wadi
Alluvium Sand with lithologically
diverse pebbles and cobbles
of many colors but especially white, pink, brown, dark
gray and green.
Upper Nubia Sandstone.
From a distance appears purplish-
Cretaceous Sandstone black due to a coating of ‘desert varnish’.
Late Fawakhir Granite
and granodiorite with abundant iron-
Precambrian Granite stained,
gold-bearing, hydrothermal quartz
veins.
From a distance appears pink to pale red
due
to natural coloring.
Hammamat A
variety of slightly metamorphosed sedimentary
Siliciclastics rocks, including (meta) greywacke
sandstone to
siltstone
(the ancient Egyptian bekhen-stone),
conglomerate
and shale. From a distance appears
dark
brownish-gray due to a coating of ‘desert varnish’.
Dokhen A variety of slightly
metamorphosed volcanic
Volcanics rocks,
including (meta) rhyolite, andesite and basalt.
From
a distance appears pinkish-brown due to
weathering.
Atalla Serpentinite.
From a distance appears pinkish-
Serpentinite brown
due to weathering.
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