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Antartide · Vulcano a scudo

Mount Takahe

Takahe

Tipo
Vulcano a scudo
Altitudine
3460 m
Ultima eruzione
-5550
Mount Takahe
Foto: NASA ICE · Public domain · Wikimedia Commons
Tipo
Vulcano a scudo
Paese
Antartide
Regione
Antartide e Scotia / Western Antarctica Volcanic Province
Altitudine
3460 m
Coordinate
-76.280, -112.080
Ultima eruzione
-5550
Contesto tettonico
Intraplacca / Crosta continentale (> 25 km)
Forma vulcanica
A scudo
Roccia principale
Trachite / Trachidacite
Sintesi geologica

Mount Takahe is an isolated shield volcano in eastern Marie Byrd Land with an 8-km-wide summit caldera. The massive 780 km3 volcano displays a conical, youthful morphology, and the oldest dated rocks are only 310,000 years old. Three samples were too young to date by Potassium-Argon, and some tephra layers younger than 30,000 years in the Byrd Station ice core are thought to have originated from Takahe. Two early Holocene phreatomagmatic tephra layers in the Antarctic ice core were attributed to Takahe (Palais et al., 1988). The latest stage of activity constructed cinder cones on the upper southern flanks and tuff cones and cinder cones on the lower SW and NE flanks.

Sintesi da Wikipedia

Riassunto in inglese

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. Most of the volcano is formed by trachytic lava flows, but hyaloclastite is also found. Snow, ice, and glaciers cover most of Mount Takahe. With a volume of 780 km3 (200 mi3), it is a massive volcano; the parts of the edifice that are buried underneath the West Antarctic Ice Sheet are probably even larger. It is part of the West Antarctic Rift System along with 18 other known volcanoes.

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Storia delle eruzioni

3 registrateGlossario
Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni · Usa le frecce per spostarti tra le barre, Invio per aprire
7050 a.C.~6900 a.C. · 1 eruzioni · VEI max. ?6300 a.C.~6150 a.C. · 1 eruzioni · VEI max. ?5700 a.C.~5550 a.C. · 1 eruzioni · VEI max. ?7050 a.C.6750 a.C.6300 a.C.6000 a.C.5700 a.C.

Cronologia dettagliata

  1. 5550 a.C.VEI ?Stima geologica
    5550 a.C. – fine sconosciuta
  2. 6250 a.C. (±5400 anni)VEI ?Stima geologica
    6250 a.C. – fine sconosciuta
  3. 7050 a.C.VEI ?Stima geologica
    7050 a.C. – fine sconosciuta

Vulcani nelle vicinanze

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.