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Snowfingers, which are regions of hoar crystals growing above the surface.
The genesis of the triangular shapes are unknown.
Photograph by Steven Arcone, USA CRREL in West Antarctica December 7, 2000

Workshop on the Microstructure and Properties of Firn
Thayer School of Engineering
Dartmouth College
14 Engineering Drive
Hanover, NH 03755

(603) 646-2184

Firn Workshop