Iceberg

An iceberg is a piece of freshwater ice more than 15 m long that has broken off a glacier or an ice shelf and is floating freely in open water. Smaller chunks of floating glacially-derived ice are called "growlers" or "bergy bits". The 1912 loss of the RMS Titanic led to the formation of the International Ice Patrol in 1914. Much of an iceberg is below the surface, which led to the expression "tip of the iceberg" to illustrate a small part of a larger unseen issue. Icebergs are considered a serious maritime hazard. Icebergs vary considerably in size and shape. Icebergs that calve from glaciers in Greenland are often irregularly shaped while Antarctic ice shelves often produce large tabular icebergs. The largest iceberg in recent history, named B-15, measured nearly 300 km × 40 km.

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Massive Antarctic Iceberg – Twice the Size of New York City – on the Move

Brunt Ice Shelf Breaks in Antarctica – Spawns Mega Iceberg 12x the Size of San Francisco

Brunt Ice Shelf in Antarctica Calves Massive Iceberg As Big as Greater London

Antarctica’s Brunt Ice Shelf Finally Breaks – Spawns Iceberg Twice the Size of New York City

Satellite Sees Iceberg Twice The Size Of New York City Breaking Away From Antarctica

Wow! Iceberg larger than London breaks off Antarctica (photos)

An Iceberg The Size of London Has Broken Free From Antarctica Ice Shelf

Breakaway iceberg raises concerns over Antarctica’s 'doomsday glacier'

World's largest iceberg is getting swept away from Antarctica to its doom, satellite image shows

World’s largest iceberg is getting swept away from Antarctica to its doom, satellite image shows

Satellite peers at a creepy iceberg's 'Halloween crack' (photo)

Here’s what happened to the Delaware-sized iceberg that broke off Antarctica

Massive Antarctic iceberg ripped in two by powerful ocean currents

Massive Antarctic iceberg was ripped in two by powerful ocean currents

Arctic 'ghost island' that vanished may have actually been a dirty iceberg

Beneath Greenland iceberg, scientists find a glowing snailfish with antifreeze coursing through its veins

Fish 'chock-full' of antifreeze protein found in iceberg habitats off Greenland

Visible ocean plastics just the tip of the iceberg

Antarctica’s ‘Doomsday Glacier’ keeps scientists at bay with iceberg and sea ice. Attempts to study the deteriorating Florida-sized glacier that could raise sea levels by 2ft if it breaks off are being frustrated