a) Google Earth image of crossbeds upwind of the windward slope of a barchan in Namibia. White arrows highlight particularly prominent examples
b) Ground image of crossbeds showing general relief of interdune (<10cm)
c) Wall of pit excavated in interdune (location seen in b) shows dipping sediment layers in subsurface are contiguous with protruding layers on the surface. Alternating high and low albedo layers have different salt composition and grainsize. The darker layer forms the more pronounced micro-ridges.