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[[File:AmundsenSea-map.jpg|thumb|300px|left]]
[[File:Wesley LeMasurier.png|250px|left]]
The '''Amundsen Sea''', an arm of the [[Southern Ocean]] off of [[Westarctica]] in western [[Antarctica]], lies between [[Cape Flying Fish]] (the northwestern tip of [[Thurston Island]]) to the east and [[Cape Dart]] on [[Siple Island]] to the west. Cape Flying Fish marks the boundary between the Amundsen Sea and the [[Bellingshausen Sea]]. West of Cape Dart there is an unnamed "marginal sea" of the Southern Ocean between the Amundsen and [[Ross Sea]]s. The Norwegian expedition of 1928–1929 under Captain Nils Larsen named the body of water for the Norwegian polar explorer [[Roald Amundsen]] while exploring this area in February 1929.
'''[[Wesley E. LeMasurier]]''' is an igneous petrologist/volcanologist who specializes in the study of Cenozoic volcanoes in the [[Marie Byrd Land]] region of [[Antarctica]]. He was responsible for geological research around many of [[Westarctica]]'s volcanic mountains. [[Mount LeMasurier]] was named in his honor.


The sea is mostly ice-covered, and the [[Thwaites Ice Tongue]] protrudes into it. The [[ice sheet]] which drains into the Amundsen Sea averages about 3 km (1.9 mi) in thickness; roughly the size of the state of Texas, this area is known as the Amundsen Sea Embayment (ASE); it forms one of the three major ice-drainage basins of the [[West Antarctic Ice Sheet]].
Dr. LeMasurier's work includes studying the origin and evolution of Cenozoic volcanic rocks, the nature of the tectonic environment of volcanism, and the volcanic record of glacial history. In 1990, after conducting a survey of [[Mount Berlin]], he declared the volcano to be "potentially active." Later, in 1994, during field work around [[Mount Siple]], Dr. LeMasurier knocked off a piece of rock from the mountain and sent it to Ruth Siple, the widow of [[Paul A. Siple]], for whom the mountain was named.


It is Westarctica's largest sea. '''([[Amundsen Sea|Full Article...]])'''
'''([[Wesley E. LeMasurier|Full Article...]])'''

Latest revision as of 16:11, 17 October 2025

Wesley LeMasurier.png

Wesley E. LeMasurier is an igneous petrologist/volcanologist who specializes in the study of Cenozoic volcanoes in the Marie Byrd Land region of Antarctica. He was responsible for geological research around many of Westarctica's volcanic mountains. Mount LeMasurier was named in his honor.

Dr. LeMasurier's work includes studying the origin and evolution of Cenozoic volcanic rocks, the nature of the tectonic environment of volcanism, and the volcanic record of glacial history. In 1990, after conducting a survey of Mount Berlin, he declared the volcano to be "potentially active." Later, in 1994, during field work around Mount Siple, Dr. LeMasurier knocked off a piece of rock from the mountain and sent it to Ruth Siple, the widow of Paul A. Siple, for whom the mountain was named.

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