Westarctica: Created page with "Map of Mount Takahe showing the location of Gill Bluff '''Gill Bluff''' (76°14′S 112°33′W) is a rock bluff on the northwest side of [..."

2019-12-01T22:05:48Z

Created page with "350px|thumb|Map of Mount Takahe showing the location of Gill Bluff '''Gill Bluff''' (76°14′S 112°33′W) is a rock bluff on the northwest side of [..."

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[[File:Gill-Bluff.jpg|350px|thumb|Map of Mount Takahe showing the location of Gill Bluff]]
'''Gill Bluff''' (76°14′S 112°33′W) is a rock bluff on the northwest side of [[Mount Takahe]] in [[Westarctica]].

==Paleological ice levels==
In 1999, a team from Albion College and the New Mexico Bureau of Mines conducted an extensive survey of Mount Takahe in an attempt to determine if the [[West Antarctic Ice Sheet]] was higher in the past than it is in modern time. They determined that vertical expansions of the West Antarctic Ice Sheet up to 575 meters above the present [[ice]] level are recorded in three volcanic passage zones around Mt. Takahe. The horizontal passage zones at Stauffer Bluff, Gill Bluff and [[Möll Spur]] formed where the late-stage lower flank eruptions emerged above the level of ice-magma interaction. The passage zones are inferred to represent approximate paleo-ice-levels at the time of eruptions.

Descending and climbing passage zone sequences at Gill Bluff may indicate the draining and refilling of an ice-marginal lake during the eruption interval. In addition to glaciovolcanic deposits, an ablation till at Roper Point, located 292 meters above the present ice-sheet level, overlies an in-situ lava deposit.

==Discovery and name==
Gill Bluff, with the rest of Mount Takahe, was mapped by the United States Geological Survey utilizing ground surveys and [[U.S. Navy]] air photos collected during the 1959–66 seasons. The bluff was named by the Advisory Committee on [[Antarctic]] Names in honor of Allan Gill, an aurora researcher at [[Byrd Station]] in 1963.

==External links==
* [https://www.researchgate.net/publication/330183703_Higher_inland_ice_levels_of_the_West_Antarctic_Ice_Sheet_at_Mt_Takahe_volcano_during_Early_and_late_Wisconsinan_times Research paper on Gill Bluff]

[[Category: Geography of Westarctica]]

Gill Bluff - Revision history

Westarctica: Created page with "Map of Mount Takahe showing the location of Gill Bluff '''Gill Bluff''' (76°14′S 112°33′W) is a rock bluff on the northwest side of [..."