[1] The pink-brown sandstone of the pass was worn away by repeated cycles of extreme dryness interrupted by torrential rain.

[1] The bases of the steep valley walls are covered in scree, loosed by the erosion of the rainfall.

Acacias are a notable exception, as they are resistant to drought.

[1] Amojjar Pass is an important link for ground transportation in Mauritania because it provides a somewhat protected roadway connecting Mauritania's capital, Nouakchott, with other important locations such as Ouadane and Chinguetti.

[2] The Neolithic rock paintings of Agrour Amogjar are near the pass, northeast of Atar at 20°35′N 12°45′W / 20.583°N 12.750°W / 20.583; -12.750.