Definition of "zastruga"

Later winds, if of sufficient force, will erode away the kalutoqaniq, producing sculptured forms which have great beauty but which are exceeding difficult to traverse. The sculpturings are widely known by the terms zastrugi (Russian) or skavler (Norwegian), but are more accurately known as kaioqlaq (Eskimo [Inuit]). Zastrugi or skavler refer to surface sculpturings in general. Kaioqlaq refers to large, hard sculpturings while the word tumarinyiq (Eskimo [Inuit]) refers to small zastrugi or "ripple marks."

2003, William C. Wonders, Canada's changing North‎, McGill-Queen's Press, page 40