Which of the following is most true about ice motion in a glacier?
glaciers advance mostly by sliding along their base
glaciers often slide along their base and flow plastically below an ice depth of about 50-60m
glaciers slide along their base and break into crevasses that open and close, inching the glacier forward
glaciers move mostly by melting and breaking into pieces
The statement glaciers often slide along their base and flow plastically below an ice depth of 50-60m is the most true. The glaciers are found as ice sheets or over the mountains known as valley glaciers. Ice sheets flow plastically under its own weight below 50-60m. The valley glaciers move dominantly due to sliding along their base because of gravity.
Which of the following is most true about ice motion in a glacier? glaciers advance mostly...
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