Sahara | Sands

The , the world’s largest hot desert, is famously characterized by its expansive "sand seas" known as ergs . While popular perception often depicts it as an endless landscape of dunes, sand actually covers only about 25% of its 9.2 million square kilometer surface. The remaining area consists of rocky plateaus ( hamadas ), gravel plains ( regs ), and mountains. Composition and Formation

The sands of the Sahara are primarily composed of . Their iconic reddish and orange hues are often the result of iron oxide coatings on the grains. These vast quantities of sand were formed over millions of years through: sahara sands