The Ancient Draa of Mars are Epic Waves of Sand
The Juventae Chasma on Mars contains dunes of all sizes, from the smallest ripples through the largest draa towering hundreds of meters tall. A giant draa, superimposed with dunes, transverse aeolian ridges, and tiny ripples. Click for huge version. Like water waves, sand dune landforms have a wavelength measured from crest-to-crest. The smallest wavelengths are…
