Erebus Ice Tongue

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The Erebus Ice Tongue is a mountain outlet glacier that projects 11–12 km into McMurdo Sound from the Ross Island coastline near Cape Evans, Antarctica. The glacier tongue varies in thickness from 50 m at the snout to 300 m at the point where it is grounded on the shoreline. Explorers from Robert F. Scott’s Discovery Expedition (1901–1904) named and charted the ice tongue.
Erebus Ice Tongue is about 10 m high and is centred upon 77.6 degrees south latitude, 166.75 degrees east longitude. The portion of the ice tongue extending beyond the shoreline or grounding line floats upon the water.
Ice tongues emerge when a glacier ice stream flows rapidly (relative to surrounding ice) into the sea or a lake, usually in a protected area. For instance, Capes Evans and Royds extending from Ross Island protect the Erebus Ice Tongue from the open waters of the Ross Sea. Hut Point Peninsula to the south helps deflect icebergs propelled by prevailing southerly winds.
The long, narrow Erebus ice stream drains from the western slope of Mount Erebus, an active volcano rising 3,794 m (12,448 ft) in elevation. The mountain constantly replenishes the glacial ice stream, as annual snow fall exceeds annual snow melt. The Erebus Ice Tongue is a dynamic structure subject to a host of internal and external stresses which affect its shape, size, and durability.

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