Deposits of Sand: Ripples Versus Dunes - Dune Worlds: How Windblown Sand Shapes Planetary Landscapes - page 63

Fig. 5.19 Crossbedded layers in a dune exposed by digging: note the
near-horizontal layers at top, and dipping slipface layers below. Ruler
is 15 cm long (see also the boots at upper right for scale). White Sands

National Monument, at the first Planetary Dunes workshop in 2008.
Photo courtesy of Jani Radebaugh

Fig. 5.20 Exposed cemented layers of a former slipface on a barchan near the Salton Sea (visible at top left) in Southern California. View is
looking along one arm of the barchan, which has crossed and blocked a small road. Photo R. Lorenz