Alternate timeline
(covers information from an alternate timeline)
(covers information from an alternate timeline)
An iceberg is a massive chunk of ice that has broken off of a glacier and floats in the ocean until it melts.
In 2371, Captain Kathryn Janeway compared fractures in time to floating around like icebergs on the surface of an unnamed planet in the Delta Quadrant. (VOY: "Time and Again")
The script of "Playing God" described the verteron nodes in the wormhole as being "like icebergs blocking the Titanic."