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Hudson Mountains

成層火山 · Antarctica · 749m

Hudson Mountains volcanic field comprises about 20 volcanic nunataks. These are peaks protruding from ice, and here represent the surface expression of multiple volcanic vents. At least four nunataks can be seen faintly in this image, looking across the southern Hudson Mountains from the west. The exposed ridge in the left foreground is Webber Nunatak. The uppermost, largely ice-covered nunatak seen here is Mount Manthe, one of the largest peaks in this volcanic field and dated to about 5 million years ago. A tephra layer from this field was erupted about 2,000 years ago.
Hudson Mountains volcanic field comprises about 20 volcanic nunataks. These are peaks protruding from ice, and here represent the surface expression of multiple volcanic vents. At least four nunataks can be seen faintly in this image, looking across the southern Hudson Mountains from the west. The exposed ridge in the left foreground is Webber Nunatak. The uppermost, largely ice-covered nunatak seen here is Mount Manthe, one of the largest peaks in this volcanic field and dated to about 5 million years ago. A tephra layer from this field was erupted about 2,000 years ago. · 写真: U. S. Navy photo TMA 2035 F31 203. · Wikimedia Commons
タイプ
成層火山
国
Antarctica
地域
Antarctic-Scotia Volcanic Regions / Western Antarctica Volcanic Province
標高
749m
座標
-74.330, -99.420
最終噴火
-207年
テクトニクス環境
Intraplate / Continental crust (> 25 km)
火山地形
Composite
主要岩石
Basalt / Picro-Basalt
地質学的概要

The Hudson Mountains, located along the Walgreen Coast in Antarctica's western Ellsworth Land, contain many only slightly eroded cones forming nunataks protruding above the Antarctic icecap. The cinder cones apparently rest on three extensively eroded Miocene stratovolcanoes, Teeters Nunatak, Mount Moses, and Mount Manthe. Subaerial basaltic lava flows dominate, but subglacial or subaqueous tuffs and lava flows are also present. A tephra layer from an eruption of a subglacial volcano in the Hudson Mountains was dated from ice thickness at about 200 BCE. The possible presence of steam was reported at one of the Hudson volcanoes during 1974. Satellite data suggested that an eruption of Webber Nunatak took place during 1985, although this has not been confirmed (LeMasurier and Thomson, 1990).

Wikipedia の要約

英語版の要約

The Hudson Mountains are a mountain range in western Ellsworth Land just east of Pine Island Bay at the Walgreen Coast of the Amundsen Sea. They are of volcanic origin, consisting of low scattered mountains and nunataks that protrude through the West Antarctic Ice Sheet. The Hudson Mountains are bounded on the north by Cosgrove Ice Shelf and on the south by Pine Island Glacier. The mountains were volcanically active during the Miocene and Pliocene, but there is evidence for an eruption about two millennia ago and uncertain indications of activity in the 20th century.

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噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
207 BCE~8 BCE · 1件 · 最大 VEI 41786~1985 · 1件 · 最大 VEI ?207 BCE39178913871786

詳細タイムライン

  1. 1985年VEI ?地質学的推定
    1985-07-02 ~ 進行中
    Webber Nunatak
  2. 紀元前 207年 (±240年)VEI 4地質学的推定
    BCE 207 ~ 進行中
    Hudson Mountains Subglacial Volcano

外部リンク

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