Edge of a Glacier Where It Breaks Up Into Blocks

This page is the CodyCross answer for the clue below from Small World, Group 695, Puzzle 4 (The Borrowers).

Question is: Edge of a Glacier Where It Breaks Up Into Blocks

and the answer is: ICEFALL

Word Meaning:

ICEFALL — A relatively rapid and turbulent flow of ice, somewhat analogous to a waterfall.

Definitions from Wiktionary.