One glacier calves 10% of all Greenland's icebergs, and probably sank the Titanic

Jakobshavn Isbræ, on Greenland's west coast, is one of the fastest-moving glaciers on Earth, discharging huge volumes of ice into Disko Bay each year. Ocean currents carry icebergs from that bay south along a well-documented drift path, and researchers have identified it as the most likely source of the iceberg that sank the Titanic in 1912, though no direct proof can ever confirm which exact iceberg was responsible. It remains one of the single largest sources of Greenland's ice loss today.

— Wikipedia contributors, Jakobshavn Glacier — Standard glaciological accounts; iceberg drift research