Snow drift

I still do not understand, why sand forms dunes but snow forms drifts. After all, their physical process of formation is not all that different, and when you look at them in black and white, they look just the same, you cannot tell. Especially when you photograph with delicate fim grain, adding to grittiness of fresh snow. Although, after closer examination, I think sand and snow reflect light differently, so you can actually tell them apart.

I was looking for this image- snow drift with wide S-curve, whole winter this year. Mission accomplished…