what is the difference between sand dunes and loess?
WHEN WIND BLOWS IT LIFT AND TRANSPORTS SAND FROM 1 PLACO ANOTHER.WHEN IT STOP BLOWING THE SAND FALLS AND GET DEPOSITED IN LOW-HILL LIKE STRUCTURES.THESE R CALLED SAND DUNES.
WHEN THE GRAINS OF SAND R VERY FINE AND LIGHT , THE WIND CAN CARRY IT OVER VERY LONG DISTANCES. WHEN SUCH SANDIS DEPOSITED IN LARGE AREAS, IT IS CALLED LOESS.