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[[File:Icesheet-Map.jpg|thumb|300px|left]]
[[File:Wesley LeMasurier.png|250px|left]]
The '''[[West Antarctic Ice Sheet]]''' (WAIS) is the segment of the continental ice sheet that covers [[Westarctica]] and the portion of [[Antarctica]] on the side of the [[Transantarctic Mountains]] which lies in the Western Hemisphere. The WAIS is classified as a marine-based ice sheet, meaning that its bed lies well below sea level and its edges flow into floating [[ice-shelf|ice shelves]]. The WAIS is bounded by the [[Ross Ice Shelf]], the [[Ronne Ice Shelf]], and outlet [[glacier]]s that drain into the [[Amundsen Sea]].
'''[[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.


Under the force of its own weight, the ice sheet deforms and flows. The interior ice flows slowly over rough bedrock. In some circumstances, ice can flow faster in ice streams, separated by slow-flowing ice ridges. The inter-stream ridges are frozen to the bed while the bed beneath the ice streams consists of water-saturated sediments. Many of these sediments were deposited before the ice sheet occupied the region, when much of West Antarctica was covered by the ocean. The rapid ice-stream flow is a non-linear process still not fully understood; streams can start and stop for unclear reasons.
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.


'''([[West Antarctic Ice Sheet|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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