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- Q= What is the Bentley Sub-Glacial trench?A= The Sub-Glacial is about 2,540 meters (8,333 feet) below sea level, the Bentley Sub-glacial Trench is the world's lowest dry elevation. Located in Western Antarctica, it was named for geologist Charles R. Bentley, currently a professor at the University of Wisconsin. Oddly enough, the the trench floor is covered by over 3,000 meters of snow and ice, which actually puts its surface above sea level.
Wiki User
∙ 13y ago
Wiki User
∙ 8y agoFrom the CIA World Fact Book: "The Bentley Subglacial Trench is a vast topographic trench in Marie Byrd Land, West Antarctica, 80°S, 115°W. At 2,555 meters (8,382 ft) below sea level, it is the lowest point on the surface of the earth not covered by ocean, although it is covered by ice."
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What are types of bacteria that live in Antarctica?
Generally, bacteria requires a host in order to multiply and remain viable. However, there are endospores that can remain viable for millions of years withstanding the freezing environment. Dormant bacteria are extremely difficult to identify. However, in recent years, as scientists have drilled access to sub-glacial lakes -- Lake Vostok and Lake Whillins -- bacteria have been found. As of February 2013, scientists were analyzing the DNA of these organisms to determine their identity. It is possible that these organisms have never been seen before on earth. What's interesting to learn is that these sub-glacial lakes are liquid, possibly because of their proximity to the molten core of the earth.
What is in rock cores from Antarctica?
Probably a plethora of minerals, as well as some extremophile bacteria that can survive in the sub-zero temperatures.
How do glaciers move rocks?
Glaciers advance downhill on a thin film of glacial meltwater produced by heat from friction of the moving glacier melting sub-glacial ice. This is how they 'slide' but there are other ways of advance like laminar flow where individual layers of ice-pack slide over one another.
What continent is almost covered by a Hugh ice cap?
Antarctica is the worlds southernmost continent. It is covered by ice and snow and has sub zero temperatures daily.
How thick are the South Pole's ice sheets?
At the South Pole, the ice is more than 9,300 feet thick. Since not all of the ice that covers Antarctica has been measured, it's difficult to say what other thicknesses there may be. There is another example, however: Lake Vostok. The elevation of the ice at Vostok Station is 11,444 feet above sea level and the surface of the sub-glacial lake is -1,640 feet. This is thicker than the ice at the South Pole.
What is the lowest point of the arctic?
The lowest point is the Bentley Subglacial Trench at -8,327 ft. (-2,538 m) below sea level.This is also the lowest point on Earth not covered by seawater, although it is covered in ice.Another AnswerBecause Antarctica is so unexplored, indeed, the lowest point has not yet been identified. The Bentley Sub-glacial Trench is the deepest discovered to date.
What is the lowest and highest elevation in Antarctica?
The highest point is Vinson Massif, which measures 4,892 metres above sea level. Since not all of the continent under the ice sheet has been measured, the lowest point found to date is the Bentley sub-glacial trench, at 2,555 metres below sea level.
Why is the lower layer of Antarctica warm?
Some theorize that the sub-glacial lakes under Antarctica's ice sheet are melted because of being closer to the Earth's molten core.
Where is the thickest ice in the Antarctic?
The thickest ice is found in East Antarctica. For example, Lake Vostok, a sub-glacial lake found in East Antarctica has a surface measured at -1,640.4′.
What are the names of canyons in Antarctica?
Ninety-eight percent of Antarctica is covered with an ice sheet, and most of the lower parts of the continent under the ice sheet are called trenches. According to the CIA, notably, the Bentley Subglacial Trench in Marie Byrd Land of West Antarctica: [ 80°S, 115°W] lies 2,555 meters or 8,382 feet below sea level. Named, then, there is no lower point on earth not covered by water. In 2014, according to the Geological Society of America Bulletin, a massive sub-glacial valley up to 3 kilometers -- 1.9 miles -- deep and more than 25 kilometers -- 15.5 miles was discovered under the Ellsworth Mountains. To date, it has not been named. Because not all trenches have been identified, there is no comprehensive list of trench names.
What type of volcano is an ice volcano?
A Sub Glacial Volcano
How can there be rivers under the Antarctica Ice Caps?
Rivers on the surface of Antarctica are a seasonal melt-water phenomenon near the coasts. Under the ice sheet, there are sub-glacial lakes, not rivers. Some theorize that the bottoms of the ice sheet melt due to geo-thermal heat.
Is the subarctic on Antarctica?
No. Sub-arctic is in the northern hemisphere -- Antarctica is in the southern hemisphere.
What is a Sub-Antarctic coast?
Anything labeled 'sub-Antarctica' implies that the land lies near the Antarctic continent. A sub-Antarctic coast would be land -- possibly an island -- near Antarctica.
What is so special about Lake Vostok?
Lake Vostok is the largest sub-glacial lake in Antarctica. It is 13,000 feet under the surface of Antarctic ice. It is about the size of Lake Ontario. Scientists believe the lake could have ancient organisms, bacteria, and even fish.
Is it necessary to do work at Antarctica?
This is probably the only place on our planet where we can look back up to 650K years ago in the planet's history. There is a sub-glacial lake under the Russian Vostok station. The work of all scientists is vital.Another AnswerAny temporary assignment that gives you the opportunity to live and work in Antarctica is directly related to your ability to work. Governments fund scientists and workers to study the health of planet earth on Antarctica.
What is timbering in trenches?
When the depth of trench is large or when the sub - soil is loose, the sides of the trench may cave in. The problem can be solved by adopting a suitable method of timbering.
