Other Dunes and Other Sand Deposits - Dune Worlds: How Windblown Sand Shapes Planetary Landscapes - page 91

Fig. 7.5 Without wind
information it is hard to judge if
this is a climbing dune or a
falling dune, but most probably
the former. In a human sense,
however, it is literally a climbing
dune! Sand has piled up against a
rock massif in the popular Wadi
Rum area in Jordan. Tourists (just
visible silhouetted at the top of
the dune) are invited to climb up
the steep sand slope. Photo R.
Lorenz

Fig. 7.7 Dunes on the lee side of plateau (right) on Mars. Towards
the top the dunes are short, and might be classified as falling dunes, but
grade to much more definitely lee dunes towards the bottom. As the
linear lee dunes peter out, a chain of barchans takes their place. Image
NASA

Fig. 7.6 Cat dune in the Mojave Desert—an example of a falling
dune. Photo J. Zimbelman

present on the downwind side of the arcuate central section,
indicating formation under a unimodal wind regime. The
slip face on parabolic dunes occurs on the side opposite to

that of the horns, so that the horns point in the upwind
direction, the opposite to the wind orientation for the horns
of a barchan dune.