Precipitation in the form of snow from a convective cumulus-type cloud, are known as flurries. They are characterized by the suddenness with which they start and stop, by their rapid changes in intens
ity, and usually by rapid changes in the appearance of the sky.
Tall lateral moraines on the sides of receding valley glaciers are commonly so steep that rapid erosion and gullying takes place on their side facing the glacier and causes vertical channels (flutes).
A set of low ridges formed parallel to ice flow, metre-scale in width, 100 metre-scale in length. They commonly extend down-valley from a boulder, and consist of till.
Steep, strongly ribbed and gullied snow slopes produced by a combination of rime on the ribs and avalanching in the gullies. These slopes form the upper parts of the accumulation area of tropical and
Himalayan glaciers.