We tend to think of icebergs as jagged and pointy, with the bulk beneath the surface, and with a penchant for ruining DiCaprio romances.
Images of the unusual icebergs were captured on NASA's IceBridge flight, an airborne survey of Arctic and Antarctic ice yielding detailed, three-dimensional views of ice sheets, ice shelves and sea ice.
It even has a name: A tabular iceberg, a type of iceberg both broad and flat.
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Operation IceBridge refers to the formation as a tabular iceberg and says it was found floating in the sea ice just off the Larsen C ice shelf in the Antarctic.
"We get two types of icebergs: We get the type that everyone can envision in their head that sank the Titanic, and they look like prisms or triangles at the surface and you know they have a insane subsurface", Kelly Brunt, an ice scientist with NASA, told Live Science.
Floating off the coast of Antarctica is an iceberg, but not any normal iceberg you've ever seen. Such non-conventional icebergs can be massive, with the record-setting 11,000 square kilometer Iceberg B-15, visible from space, spotted off the Ross Ice Shelf in Antarctica in 2000.
A semi-circle shaped iceberg with vertical sides, from the Venable Ice Shelf.
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"We get two types of icebergs: We get the type that everyone can envision in their head that sank the Titanic, and they look like prisms or triangles at the surface and you know they have a insane subsurface", Brunt said.
Others simply posted photos of other majestic tabular icebergs.
Tabular icebergs form, Brunt told LiveScience, through a process that's a bit like a fingernail growing too long and cracking off at the end.
"The best thing I can say is that when a "trillion tonne" iceberg runs into an ice-covered rocky island (Bawden Ice Rise) the crystalline glacier ice will fracture along planes of weakness, much like a more typical mineral crystal might be cleaved".
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