Fluted snow

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.

Fluted snow on the upper slopes of Nevado Chacraraju (6112 m), Peruvian Andes. Photo J. Alean, 1979.