Earth Dunes - Dune Worlds: How Windblown Sand Shapes Planetary Landscapes - page 125

Fig. 11.16 Timelapse image of
a dune at Bruneau. The dark-
bright patterning is the result of
emerging transverse bedforms
(dry sand over rain-produced wet
sand) along the flanks of this
somewhat linear dune. Streamers
of sand are visible in the center
of the image, while sand blowing
off the dune is visible at upper
right. Photo J. Zimbelman
Fig. 11.17 Dunes formed in
snow, on a 'blue ice' plain in
Antarctica. Image courtesy Ted
Scambos and Rob Bauer,
National Snow and Ice Data
Center
Fig. 11.18 Aerial view of
Antarctic megadunes. The
irregular but repeating pattern is
striking, as is the subtle shading.
At lower left, the orthogonal
downwind pattern of ridges
(sastrugi) is evident. Image
courtesy of Ted Scambos and
Rob Bauer, National Snow and
Ice Data Center