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Some named Antarctic iceshelves. Ice shelf extending approximately 6 miles into the Antarctic Sound from Joinville Island. An ice shelf is "a floating slab of ice originating from land of considerable thickness extending from the coast (usually of great horizontal extent with a very gently sloping surface), resulting from the flow of ice sheets, initially formed by the accumulation of snow ...
Shelf ice is a floating mat of ice, but unlike a pond or a small lake that freezes over, the shelf is not a uniform sheet of ice. Created by the wind and waves, the shelf ice is a jumble of ice chunks, pushed onto each other. It is as if you took a pile of rubble and pushed up against a wall.
In mid-May 2021, A-76 was, before it broke into three, [1] the world's largest floating iceberg, calved from the Filchner–Ronne Ice Shelf in Antarctica. [ 2 ] [ 3 ] [ 4 ] The new iceberg, effectively a piece of floating ice shelf, detached from the western side of the ice shelf.
An iceberg is a piece of fresh water ice more than 15 meters (16 yards) long [1] that has broken off a glacier or an ice shelf and is floating freely in open water. [ 2 ] [ 3 ] Smaller chunks of floating glacially derived ice are called "growlers" or "bergy bits".
The WAIS is classified as a marine-based ice sheet, meaning that its bed lies below sea level and its edges flow into floating ice shelves. [7] [14] The WAIS is bounded by the Ross Ice Shelf, the Filchner-Ronne Ice Shelf, and outlet glaciers that drain into the Amundsen Sea. [15]
Drift ice, also called brash ice, is sea ice that is not attached to the shoreline or any other fixed object (shoals, grounded icebergs, etc.). [ 1 ] [ 2 ] [ 3 ] Unlike fast ice , which is "fastened" to a fixed object, drift ice is carried along by winds and sea currents , hence its name.
Ice rafting is the transport of various materials by floating ice. [1] Various objects deposited on ice may eventually become embedded in the ice. When the ice melts after a certain amount of drifting, these objects are deposited onto the bottom of the water body , e.g., onto a river bed or an ocean floor .
An ice shelf basal channel is a type of subglacial meltwater channel that forms on the underside of floating ice shelves connected to ice sheets. Basal channels are generally rounded cavities which form parallel to ice sheet flow.
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