page_title: Desert pavement
section_title: Local names
hierarchical_section_title: Desert pavement / Local names
caption_attribution_description: English: Reg in Adrar (Mauritania) Français&#160;: Reg dans l'Adrar mauritanien
context_page_description: A desert pavement, also called reg, serir, gibber, or saï is a desert surface covered with closely packed, interlocking angular or rounded rock fragments of pebble and cobble size. They typically top alluvial fans. Desert varnish collects on the exposed surface rocks over time.
  Geologists debate the mechanics of pavement formation and their age.
context_section_description: Stony deserts may be known by different names according to the region. Examples include:
  Gibbers:  Covering extensive areas in Australia such as parts of the Tirari-Sturt stony desert ecoregion are desert pavements called Gibber Plains after the pebbles or gibbers. Gibber is also used to describe ecological communities, such as Gibber Chenopod Shrublands or Gibber Transition Shrublands.
  In North Africa, a vast stony desert plain is known as reg. This is in contrast with erg, which refers to a sandy desert area.
caption: The desert known as Reg de l'Adrar in Mauritania
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