Cover and Concealment in Arid Regions
Cover and Concealment and Obscuration by Pattern Clutter:
Basins and other topographic lows
Dune fields – coppice
Hoodoos
Tafoni
Yardangs
Burn scars
Concealment by Excavation in Dune Fields
Digging in dry active dunes is futile, because of the lack of cohesion.
In damp sand areas, excavations can be made to a meter or more, but these rapidly
collapse as the exposed sand dries.
Even when a cohesive substrate is present, and excavation is practical, the void fills in
rapidly with loose sand that moves with every windstorm.