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A giant impact crater beneath the Wilkes Land ice sheet was first proposed by Richard A. Schmidt in 1962 on the basis of the seismic and gravity discovery of the feature made by the U.S. Victoria Land Traverse in 1959–60 (VLT), and the data provided to Schmidt by John G. Weihaupt, geophysicist of the VLT (Geophysical Studies in Victoria Land, Antarctica, Report No. 1, Geophysical and Polar ...
In studying the cores, ANDRILL scientists from various disciplines are gathering detailed information about past periods of global warming and cooling. [2] A major goal of the project is to significantly improve the understanding of Antarctica's impact on the world's oceans currents and the atmosphere by reconstructing the behavior of Antarctic sea-ice, ice-shelves, glaciers and sea currents ...
The main features of the range formed before 34 million years ago, when the area was covered by the present ice sheet. [6] Current models suggest that the East Antarctic ice sheet was formed from the glaciers that began sliding down the Gamburtsev range at the end of the Eocene . [ 1 ]
The frozen continent of Antarctica was the last continent humanity set foot on. The first documented landings made below the Antarctic Circle took place in 1820, when Admiral Fabian Gottlieb von Bellingshausen and the crew of the Vostok and Mirny, as part of the Russian Antarctic Expedition, made land at Peter I Island and Alexander Island.
The Bransfield Strait, the result of this extension, is presumed to be four million years old or less; [2] magnetic anomalies created by the formation of new basaltic crust [6] and aligned with the axis of the Bransfield Rift [2] indicate that the newly formed oceanic crust in the Bransfield Strait is roughly 1.3 million years old. [2]
Mount Takahe is a 3,460-metre-high (11,350 ft) snow-covered shield volcano in Marie Byrd Land, Antarctica, 200 kilometres (120 mi) from the Amundsen Sea.It is a c. 30-kilometre-wide (19 mi) mountain with parasitic vents and a caldera up to 8 kilometres (5 mi) wide.
Earth’s magnetic field was once 30 times weaker than it is today. This change may have played a pivotal role in the blossoming of complex life, new research found.
The South Atlantic Ocean opened around 140 million years ago as Africa separated from South America, and about the same time, India separated from Antarctica and Australia, forming the central Indian Ocean. [citation needed] The final major phase of breakup occurred in the early Cenozoic, as Laurentia separated from Eurasia. [5]