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[′īs ‚fȯl]
That portion of a glacier where a sudden steepening of descent causes a chaotic breaking up of the ice. Also known as ice cascade.



the section of a glacier that is broken by deep fissures into separate blocks of varying shape and size. Icefalls form on the site of steep declivities in the longitudinal profile of the glacier bed, where there is an increase in the rate of the ice’s movement, resulting in crevasses.

References in periodicals archive ?
To have time to make the summit, climbers have to cross the icefalls in the dark, before the sun warms the ice, causing it to shift.
As we climb to the top of a compression ridge, the clouds lift a little--enough so that we can see several miles up the convoluted, moraine-striped glacier to Stairway Icefall.
e strenuous journey in November 2015 will take in stunning national parks, mountain ridges, beautiful lakes, amazing icefalls and stunning views of the snow capped Andes.
Everest" takes audiences across creaking icefalls and gaping chasms, up dangerous, towering cliffs, through a harrowing rescue, and into the danger zone of oxygen-thin altitude.
e 11-day itinerary encompasses national parks, mountain ridges, beautiful lakes, stunning icefalls and views of the snow-capped Andes.