Drift of sand (4)
I believe the answer is:
dune
(Other definitions for dune that I've seen before include "Seashore sand hill" , "Ridge of wind-blown sand" , "Mound of drifted sand" , "Film" , "Low hill of sand, called in a desert a barkhan" .)
I believe the answer is:
dune
(Other definitions for dune that I've seen before include "Seashore sand hill" , "Ridge of wind-blown sand" , "Mound of drifted sand" , "Film" , "Low hill of sand, called in a desert a barkhan" .)