Periods of calm were often punctuated by violent ice movement.

But the snow covered all the flaws and a thing that worried me was the grumbling thunder of ice movement to the east.

The thunder of the ice movement to the east seemed to grow and grow.

New data on ice movement may call into question the model.

Marks tend to be crescent-shaped and oriented at right angles to the direction of ice movement.

The researchers say their work suggests that the effect is much more rapid, and that ice movement could be rapidly increased by climate warming.

They are formed a short distance within the receding glacier ice and record the final direction of ice movement.

The moon is almost entirely free of impact craters, suggesting they were wiped clean by ice movement and turnover.

Such lakes are also prominent in Greenland, where they have recently been understood to be large contributors to ice movement.

Periodically violent ice movements threatened both ships, which drifted north or south as dictated by the wind.