Details & Abstract

calcite crystals: Fossils: All that stuff is many million years old, a time where the sahara was an ocean. Our guide found several great looking shark-teeth, I guess I was too fascinated for taking photos of them. The photos below show shells, snails, shells, ammonite, petrified wood, sea urchin, shell, shell. Everything just lying on the ground. Other stuff:

Black to white What's there? A layer of white sand, covered by a layer of brown sand, covered partially with black minerals. What happens? A car driving above such ground sinks the black minerals down into the sand, and blows away the brown sand at the same thime -- therefore converting black into white.

Erosion The shapes that erosion by sandy wind form are no less impressive than the stuff that water shapes in caves.

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